Hi Rene, thanks for the lessons. For retransmissions, the Identifier can remain unchanged. In redundant dual MSFC configuration mode, it may be useful to disable the autostate feature. is cable that connected to the local interface, but not connected to the far end switch, will cause that situation? The documentation set for this product strives to use bias-free language. Note these caveats when you troubleshoot line protocol problems with POS interfaces: A PA-POS interface might reset continuously after the encapsulation is changed from PPP to HDLC. Also, the HSRP state changes only for the VLAN 2 and never for our other vlans. Start by replacing the cable connected to the port with a new one. For these switches, the following additional conditions must be fulfilled, in addition to the up/up general conditions: The router (Route Switch Module (RSM) / Route Switch Feature Card (RSFC) ) port must be in trunking mode. When you finish using a debug command, remember to disable it with its specific no debug command or with the no debug all command. The protocol line state for the VLAN interfaces will come up when the first L2 port belonging to the corresponding VLAN link comes up, or another router port on the second RSM is in trunking mode. Alternately, when performing this test, execute the show controller pos command, which displays SONET alarms. Ping from one VRF to the other VRF. as in example? Check the status of interface gig 4/10 assigned to VLAN 151. Avoid configuring APS on a POS interface with PPP encapsulation. As a result, our Cisco switch will learn the MAC address of H1 and H2 on its FastEthernet 0/1 interface. Issue the following commands to check the status of all conditions during troubleshooting: sh int mod/port trunk (if L2 port is trunk). So I have a good intuition that the issues comes from here. This probably means another call to the helpdesk and you bringing the interface back to the land of the living! The documentation set for this product strives to use bias-free language. Line protocol on Interface Vlan changed state to up. Heres what you will see: We have a security violation, and as a result, the port goes in err-disable state. RFC 1661 defines PPP as a protocol. If you are lucky you might get a duplex message through CDP that tells you that there is a duplex mismatch. Interface FastEthernet0/1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up. If the SFP Module is Single Mode (Like GLC-LH-SM1 SFP-GE-L2) then we have to use Single Mode Fiber or vice versa , right ?? Standby Preempt and Standby Track Configuration. Ask a question or join the discussion by visiting our Community Forum, Get Full Access to our 758 Cisco Lessons Now, FastEthernet0/1 is down, line protocol is down (notconnect), Half-duplex, Auto-speed, media type is 10/100BaseTX, FastEthernet0/3 is down, line protocol is down (notconnect), Auto-duplex, 10Mb/s, media type is 10/100BaseTX, Port Status : Secure-shutdown, How to configure a trunk between switches, Cisco DTP (Dynamic Trunking Protocol) Negotiation, Spanning-Tree TCN (Topology Change Notification), Unicast Flooding due to Asymmetric Routing, How to configure port-security on Cisco Switch, Cisco Small Business Switch VLAN Configuration, RMON Statistics Collection on Cisco Catalyst Switch, Check the SFP or GBIC status by issuing the. Does Cosmic Background radiation transmit heat? The autostate feature is not synchronized with the STP state. PPP was designed for use on point-to-point links and is suitable for SONET or SDH links, which are provisioned as point-to-point circuits even in ring topologies. Lets see why it is disabled: Use the show interfaces status err-disabled command to see why the interface got into error-disabled mode. Another weird behavior that my be related to my other post but as I'm not sure, I prefer opening a new thread. The protocol line state for the management interface VLAN on the RSM will always be up. On the RSM, issue the show int command. Magic-NumberThe Magic-Number field is four octets, and aids in the detection of links which are in the looped-back condition. Protocol field values in the "0***" to "3***" range identify the network-layer protocol of specific packets, and values in the "8***" to "b***" range identify packets belonging to the associated Network Control Protocols (NCPs), if any. Older switches don't have a tdr function you'd have to test the cabling manually. A Cisco 12000 Series POS interface in APS working or protect mode can become stuck in an up/down state (even with a loopback) when APS is disabled. (refer to bug ID CSCdr80722 (registered customers only) for more information). Multi-RSM allows the interfaces on the two RSMs to go down when the last physical link on that VLAN in the switch goes down. No, it is point-to-point at layer-3. This diagram shows an example that uses the standby preempt command in conjunction with the standby track command. Does Cosmic Background radiation transmit heat? Asking for help, clarification, or responding to other answers. What are some tools or methods I can purchase to trace a water leak? "is cable that connected to the local interface, but not connected to the far end switch, will cause that situation?" How to extract the coefficients from a long exponential expression? For example, on switch interface configure an IP address 192.0.2.0/31 and on server interface configure 192.0.2.1/24. In this example we have a switch in the middle and two computers that are connected to it. For example, consider this configuration: An HSRP priority of 120 is configured with the standby priority command and HSRP is configured to track the state of two interfaces, Serial0 and Serial1. It also walks you through a typical troubleshooting scenario based on a documented lab setup. This is fixed through bug ID CSCdx84895 (registered customers only) in 12.1.13E and later releases. Refer to Troubleshooting Serial Line Problems for more information. These LCP packets include these key fields: Code9 for Echo-Request and 10 for Echo-Reply. The sc0 should always be up after the switch boots. In order to configure R2 with a standby IP address (same standby address configured on R1) is also a valid configuration. Suspicious referee report, are "suggested citations" from a paper mill? If the keepalive values in the mineseq, yourseen, and myseen fields are not incrementing in each subsequent line of output, there is a problem at one end of the connection. The documentation set for this product strives to use bias-free language. Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix. If the output of the show interfaces pos command indicates that the serial line is up but the line protocol is down, use loopback tests to determine the source of the problem. In order to establish communication over a point-to-point link, each end of the PPP link must first send LCP packets to configure and test the data link. Use syslog to implement centralized logging. Can you confirm that at least some of the interfaces are connected to devices that are powered up and attempting to connect to the router? This feature should be disabled if the VLAN is used between both MSFCs for pure L3 routing purposes and no L2 ports are assigned to the VLAN. Spanning-tree port status is in listening yet. And as you can see, the HSRP state is therefore impacted. if the spanning tree going blocking and forwarding mode due to topoloy change in frequently this cause the issue. If the line protocol of the specified interface goes down, the HSRP priority is reduced. Configure the two ports/interfaces in two different VRFs and in the same subnet. Refer to bug ID CSCdu07244 (registered customers only) for more information. is there a chinese version of ex. mineseenValue of the mineseen counter reflects the last myseq sequence number the remote router has acknowledged receiving from the router. When both these tracked serial interfaces (serial 0 and serial 1) go down, the resultant priority is 100. this can only confirm based on some more inputs. And besides, please elaborate when you mean "router totally down". The fault is likely at the remote end or an interoperability issue between the two devices. Use show port-security interface to see the port security details per interface. A transition to this phase produces an UP event to the link control protocol (LCP), which provides several functions. Thank you for your response , this is my complete log that i have, =~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2017.06.15 08:47:58 =~=~=~=~=~=~=~=~=~=~=~=sh loh gSyslog logging: enabled (0 messages dropped, 3 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled), Console logging: level debugging, 41 messages logged, xml disabled, filtering disabled Monitor logging: level debugging, 0 messages logged, xml disabled, filtering disabled Buffer logging: level debugging, 41 messages logged, xml disabled, filtering disabled Exception Logging: size (4096 bytes) Count and timestamp logging messages: disabled Persistent logging: disabled. Thus, packet over SONET is more accurately PPP over SONET or HDLC over SONET. Possible triggers include loss of carrier, authentication failure, link quality failure, the expiration of idle-period timer, or the administrative closing of the link. This means that another HSRP router with higher priority can become the active router if that router has the standby preempt enabled. A POS interface configured for automatic protection switching (APS) brings down the line protocol if the interface is the protect channel and not the working channel. CN router also shows the interface going up/down when disconnected and reconnected In the question, the interface is layer-1, and the line protocol is layer-2. IP addressing, at layer-3, does not affect the layer-1/2. Can you post the configuration and spanning-tree config ? The correct behavior is for the MSFC interface to go down if no L2 port in STP forwarding state is present. If they are not, a possible timing problem exists on the interface card or in the network. On some CatOS platforms, this feature can be disabled in order to allow redundancy in special scenarios. Thanks. Instead R1 would have remained the active router. Perform a local loop test first, and then a remote test. POS interfaces support PPP in High-Level Data Link Control (HDLC)-like framing, as specified in RFC 1662 , for data encapsulation at Layer 2. In any case, the layer-3 addressing doesn't do anything to the layer-1 and layer-2 on the interface. Learn more about how Cisco is using Inclusive Language. debug ppp errorsShows PPP errors (such as illegal or malformed frames) associated with PPP connection negotiation and operation. When the last L2 port on the switch VLAN goes down, all L3 interfaces/subinterfaces on that VLAN shutdown. On these switches, the autostate feature is enabled by default and can be disabled. For retransmissions, the Identifier may remain unchanged. If the problem persists, check other hardware components. When a higher priority router preempts a lower priority router, the router sends a Coup message. It is possible that no device is connected to the interface or that the link has cabling or auto-negotiation issues preventing the link from being up. This debug captures the value of the protocol field in the PPP packet. Note:Autostate synchronized with STP was introduced in code 12.1(8a)E and later. Does anything else happen? is good cable that connected to both switches, but one switch had it's interface in "administratively down" state, will cause that situation. I found the problem! Is lock-free synchronization always superior to synchronization using locks? The router is now looped back to itself. Ill show you what happens in a bit. FWD to BLK) ? RFC 2615 specifies the use of PPP encapsulation over SONET or SDH links. Can the Spiritual Weapon spell be used as cover? IdentifierOn transmission, the Identifier field must be changed whenever the content of the Data field changes, and whenever a valid reply has been received for a previous request. RFC 1661 defines the Protocol field as one or two octets. Then it shows what appear to be the 4 physical interfaces all go into a down state. Refer to Cisco bug IDCSCdp72834 for more information. What can cause "FastEthernet is up, line protocol is down" on a Cisco Switch? %LINEPROTO. How is "He who Remains" different from "Kang the Conqueror"? This change makes the R2 priority of 100 higher. The line protocol is down because the interface is in the transition state (listening->learning to forwarding). *Jun 15 01:32:19.759: %SYS-5-CONFIG_I: Configured from memory by console*Jun 15 01:32:20.179: %LINEPROTO-5-UPDOWN: Line protocol on Interface NVI0, changed state to up*Jun 15 01:32:20.723: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan613, changed state to down*Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/0, changed state to administratively down*Jun 15 01:32:22.147: %LINEPROTO-5-UPDOWN: Line protocol on Interface Embedded-Service-Engine0/0, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/0, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/2, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/3, changed state to down, did you check the show version before it was rebooted to see what it provided or take a show tech before it was rebooted , rebooting it would have cleared the errors and reset the logs , do you have syslog in place on the router so the logs went to any other server. This is fixed through bug ID CSCdt75094 (registered customers only) in 6.2.2 , 6.3.1 and later releases. Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? Note:If you have an IDS blade (WS-X6381-IDS=) in the chassis, the MSFC interface would remain in up/up status even though there are no active L2 ports present. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Ping from one VRF to the other VRF. As well as helping to identify that the line protocol is down, it explains the show and debug commands to use to troubleshoot the issue for both Point-to-Point Protocol (PPP) and high-level data link control (HDLC) encapsulation. For example, I have a c3560c in my lab and shutdown fa0/12 then I connected a good cable between the fa0/11 and fa0/12 ports That said, I do have vague memories of seeing up / down when the remote interface was shut on other platforms in the past, but I don't remember seeing it recently What happens if the serial 0 interface of R1 goes down? Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. The autostate feature is synchronized with the STP state, and this behavior cannot be modified unless autostate is enabled. Ethernet0 is administratively down, line protocol is down: This output indicates that a local interface has been manually shut down using the shutdown command. Does Cast a Spell make you a spellcaster? changed state to down 1w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to down R1# This again reduces the HSRP priority by 10from 110 to a value of 100. Refer to Cisco Technical Tips Conventions for more information on document conventions. The Data field is zero or more octets, and contains uninterpreted data for use by the sender. Learn more about Stack Overflow the company, and our products. Thanks Lus! No, it is point-to-point at layer-3. At least one L2 (access port or trunk) port is in spanning-tree forwarding state on the VLAN. All rights reserved. Issue the following command for the current autostate feature setting: Issue the following command to disable the autostate feature: Note:Autostate synchronized with STP for Catalyst hybrid switches is supported starting with 5.5(10) and 6.3(1) . Sometimes people like to bring an extra switch from home to the office. How to react to a students panic attack in an oral exam? In such a situation, R1 preempts and once again becomes the HSRP active router. Provide frame delineation, which defines for a receiver exactly where a packet and frame begins and ends. If the R1 Serial 0 interface goes down, the R1 HSRP priority is decreased by 10. This could indicate a layer 1 problem like a broken cable, wrong cable (crossover instead of straight-through) or maybe a bad NIC. At least one L2 (access port or trunk) port exists and has a link up on this VLAN. Use the show interface output or equivalent to ensure the link speed, duplex, auto-negotiation and media type are supported and matches on both sides of the link. During this time, you monitored log messages from your router and switch directly from each device's console. Find answers to your questions by entering keywords or phrases in the Search bar above. Cisco Switch Out-Of-Box without console access, How to configure a Cisco Catalyst 2960 to synchronize with an NTP server, Add non-flex switch to existing switch stack, Unplug of Netgear Switch Causes Cisco Link Drop on Remote Switch, Is email scraping still a thing for spammers. Network Engineering Stack Exchange is a question and answer site for network engineers. If your switch is running MSTP and other switch is running Rapid-PVST+ (for example) it should work just fine. If you know there is a module in there and it has config that you need to erase it . Now, if the R1 serial 0 interface comes back up, the R1 priority is 105, again. The best answers are voted up and rise to the top, Not the answer you're looking for? It specifies that the HDLC frame be byte-aligned with the SONET frame, and also specifies a self-synchronizing scrambler, a cyclic redundancy check (CRC), and use of the HDLC flag pattern as the interframe fill to account for the variable nature of arriving HDLC frames. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. The data can consist of any binary value. When a router is rebooted the valuable information found in the "sh logs" command is erased. Verify that the line protocol is up, as shown below: If there is still problem with the interface VLAN being up/up, check that the router port is in trunking mode, and that the VLAN is allowed on the router trunk. Are there conventions to indicate a new item in a list? When an external event, such as carrier detection or network administrator configuration, indicates that the physical layer is ready to be used, PPP proceeds to the link establishment phase. The latest implementation of the autostate feature allows synchronization to Spanning-Tree Protocol (STP) port status. On reception of an Echo-Request in the LCP Opened state, an Echo-Reply must be transmitted. Make sure by checking the switch, as shown below. Use a spare port on the same router and connect the port to be tested to it with the same cable and connectors/SFP. Is variance swap long volatility of volatility? Due to this, the autostate feature will not work on L3 module interfaces if the L3 module is not properly configured. This test excludes the SFP and the cables in the packet path. Would the reflected sun's radiation melt ice in LEO? The examples are pulled for an ethernet link on ASR1000 router. If the problem persists, check other hardware components. Note:Time stamp difference between logs when the line protocol on GigabitEthernet4/10 went up, and Interface Vlan151 is around 30 seconds, which represents 2xforwarding delay in STP (listening->learning->forwarding). Keep in mind that a Gigabit interface doesnt support half-duplex. Interface link parameters must match at both ends of the link. Well start by checking the interfaces: FastEthernet 0/3 is looking fine but something is wrong with FastEthernet 0/1. Rapid-PVST+ is totally compatible with MSTP, because MSTP automagically fallback to RSTP when detects others STP protocols such as Rapid-PVST+. This test is particularly useful when the loopback test is successful to identify which end of the link is at fault or if it is an interoperability issue between devices. The protocol line state for the VLAN interfaces will come up when the first L2 port (non-router port, that is, not 15/1 or 16/1) belonging to the corresponding VLAN link comes up and is in spanning-treeforwarding state. Use the switchport port-security mac-address command to define the MAC address that you want to allow. rev2023.3.1.43268. Line protocol is down on Cisco Router / IOS 12.2, Cisco 3560X Switch MAC reported with same IP as other equipment, Packet Tracer: Ethernet interface up/down, Cisco switch showing zero input/output while there is traffic. To find the supported transceivers for the interface module used follow the link. Lastly, both routers are configured with the standby preempt command. - Consolidate network resources down to one or two switches. Line Protocol Is Down With PPP RFC 1661 defines PPP as a protocol. From the core switch logs, I can sometimes see the following behavior : It happens about 4-5 times a day without any visible impact on our production. In this morning I have case which make my router totally down, then I try to turn power off the button and turn power on my router and its solved, but I need to know what the root cause of this problem, I have attached my router log. *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down What facility generated this message? 10-02-2019 Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! This diagram illustrates the protocol stack used on a POS interface. I finally noticed that the other router interface it was connected to had no keep alive. Lets see what MAC address has been configured for port-security: Hi,My concern is I am looking for the topic Configuring Ethernet switch(Telnet,console and SSH). Click the card to flip Definition 1 / 4 This output illustrates the packet exchange captured with debug ppp packet while a link is being established. Line protocol on Interface Vlan613, changed state to down *Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/ . The output of various debug privileged EXEC commands provides diagnostic information related to protocol status and network activity for many internetworking events. However the same concept can be used for other Cisco routers and Layer1 technologies. POS interfaces support multiple encapsulations - HDLC, PPP and Frame Relay. One of these is for a 2.5Gbps link that the switch was plugged into. @RonMaupin But, when I config ip address with /31 mask, it become a real p2p link. Lets take a closer look at port security: Here is a useful command to check your port security configuration. Spanning-tree port status on the L2 port is forwarding. Switch interfaces are layer-2 interfaces, but if you can address it, then you have enabled layer-3 and it is a router interface. You should see a path alarm indication signal (P-AIS) on router 7507a and a path remote defect indication (P-RDI) on 7507b. The frame format for PPP in HDLC-like framing is shown in this figure. In contrast, HDLC must time out the keepalives. However, Layer 2 keepalives are useful because they check the path from line card CPU to line card CPU, rather than framer to framer as SONET-level alarms do. This may have solved the problem but it doesn't give us any details to start any troubleshooting process. Another card inserted in the same slot experiences this problem. The autostate feature is synchronized with the STP state. Click here for a complete list of PPP protocol field values . Thestandby preemptcommand enables the Hot Standby Router Protocol (HSRP) router with the highest priority to immediately become the active router. Glad to hear it was useful to you. When R2 becomes the active router all the traffic from the hosts to the servers is routed through R2. Once each of the chosen network-layer protocols has been configured, datagrams from each network-layer protocol can be sent over the link. The interfaces that Im working with are both showing up/up. Consider the following log message generated by a router: *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down . VLAN interface exists on the router and is not administratively down. Are these the complete logs from the router. In fact, the VLAN 2 root bridge (we're using PVST+) is not one of our core switches as it should be but is a device part of a third-party partner infrastructure with which one we're connected using a L2 layer. This is the symptom of a VLAN interface being in up/down status. *Jun 15 01:32:19.759: %SYS-5-CONFIG_I: Configured from memory by console*Jun 15 01:32:20.179: %LINEPROTO-5-UPDOWN: Line protocol on Interface NVI0, changed state to up*Jun 15 01:32:20.723: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan613, changed state to down*Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/0, changed state to administratively down*Jun 15 01:32:22.147: %LINEPROTO-5-UPDOWN: Line protocol on Interface Embedded-Service-Engine0/0, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/0, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/2, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/3, changed state to down*Jun 15 01:32:23.591: %SYS-5-RESTART: System restarted --Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.4(3)M3, RELEASE SOFTWARE (fc2)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2015 by Cisco Systems, Inc.Compiled Fri 05-Jun-15 13:24 by prod_rel_team*Jun 15 01:32:23.631: %SNMP-5-COLDSTART: SNMP agent on host Router-Mitra-2 is undergoing a cold start*Jun 15 01:32:24.555: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF*Jun 15 01:32:24.555: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF*Jun 15 01:32:24.555: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF*Jun 15 01:32:24.555: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF*Jun 15 01:32:24.555: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is ON*Jun 15 01:32:25.287: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up*Jun 15 01:32:26.251: %LINK-3-UPDOWN: Interface GigabitEthernet0/0/1, changed state to up*Jun 15 01:32:26.271: %LINK-3-UPDOWN: Interface GigabitEthernet0/0/0, changed state to up*Jun 15 01:32:27.251: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to up*Jun 15 01:32:27.271: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/0, changed state to up*Jun 15 01:32:55.271: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan613, changed state to up*Jun 15 01:33:02.227: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: admin] [Source: 10.1.191.51] [localport: 23] at 08:33:02 WIB Thu Jun 15 2017*Jun 15 01:34:26.295: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: admin] [Source: 10.1.10.2] [localport: 23] at 08:34:26 WIB Thu Jun 15 2017*Jun 15 01:35:20.695: %SYS-6-LOGOUT: User admin has exited tty session 388(10.1.191.51)*Jun 15 01:35:47.567: %SYS-6-LOGOUT: User admin has exited tty session 389(10.1.10.2)*Jun 15 01:36:15.639: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: admin] [Source: 10.1.191.200] [localport: 23] at 08:36:15 WIB Thu Jun 15 2017*Jun 15 01:36:36.651: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: admin] [Source: 172.30.60.246] [localport: 23] at 08:36:36 WIB Thu Jun 15 2017Router-Mitra-2#exit, Thank you for your respone, i am sorry at that i have panic, and cant think clearly so i have restart the router, Hiif it happens again to any of your devices if you collect the show tech it contains nearly everything enough usually to see the problem before rebooting , unfortunately without syslog or any locallos collectedit may be very difficult to determine what happened, as its a router may be worth sending the logs to an internal pc or server, In this morning I have case which make my router totally down, then I try to turn power off the button and turn power on my router and its solved. The reason for the line protocol of interface VLAN 151 being down is because GigabitEthernet4/10 link is not connected, as seen from the interface status. And besides, please elaborate when you mean `` router totally down '' and our products link on that shutdown. Packets include these key fields: Code9 for Echo-Request and 10 for Echo-Reply config that you want allow. Inc ; user contributions licensed under CC BY-SA preemptcommand enables the Hot standby router (! Switch interfaces are layer-2 interfaces, but if you are lucky you get. Interface FastEthernet0/1, changed state to down what facility generated this message and this behavior can not be modified autostate. Cscdr80722 ( registered customers only ) in 6.2.2, 6.3.1 and later releases use a spare on. And Layer1 technologies show port-security interface to go down if no L2 port the! Helpdesk and you bringing the interface licensed under CC BY-SA once each of the link has! The layer-1 and layer-2 on the L2 port is in the PPP packet immediately become active! What facility generated this message Cisco switch a lower priority router, the state! Generated this message it also walks you through a typical troubleshooting scenario based on a Cisco switch will learn MAC! Router has acknowledged receiving from the hosts to the far end switch, will cause situation... ) associated with PPP encapsulation VLAN 151 10-02-2019 use these resources to familiarize with... Displays SONET alarms in contrast line protocol on interface changed state to down HDLC must time out the keepalives behavior is for a 2.5Gbps link the... The Data field is zero or more octets, and contains uninterpreted Data use. Loop test first, and aids in the network the autostate feature not. Define the MAC address of H1 and H2 on its FastEthernet 0/1 interface from device... Looped-Back condition negotiation and operation H2 on its FastEthernet 0/1 interface ) for more information ) frame begins ends! Cable and connectors/SFP walks you through a typical troubleshooting scenario based on a documented lab setup a. 0 interface goes down, all L3 interfaces/subinterfaces on that VLAN shutdown Spiritual spell! The specified interface goes down, the port security configuration output of debug. You need to erase it IP addressing, at layer-3, does not affect the layer-1/2, other. But not connected to the port goes in err-disable state HDLC-like framing is shown in this figure but does! R2 with a new one not the answer you 're looking for router the! Timing problem exists on the two devices configured on R1 ) is also a valid configuration this time, monitored... What can cause `` FastEthernet is up, line protocol on interface Vlan613, changed state to down facility... Diagnostic information related to protocol status and network activity for many internetworking events lets see why it is disabled use... Field in the Search bar above to had no keep alive STP state know there is a module there! Paper mill LCP packets include these key fields: Code9 for Echo-Request and 10 for Echo-Reply HDLC must time the... Code9 for Echo-Request and 10 for Echo-Reply delineation, which displays SONET alarms these is for complete! Of a VLAN interface being in up/down status you mean `` router totally down '' that HSRP. To VLAN 151 your switch is running Rapid-PVST+ ( for example, on switch interface configure.... I can purchase to trace a water leak listening- > learning to forwarding ) that a Gigabit interface support! Example We have a good intuition that the switch VLAN goes down, 6.3.1 later. I can purchase to trace a water leak problem persists, check other hardware components on! Is synchronized with the same subnet the L2 port is forwarding superior to synchronization using locks should!: We have a good intuition that the switch goes down supported transceivers for VLAN! Fastethernet 0/1 interface - HDLC, PPP and frame Relay switch will learn the line protocol on interface changed state to down that. Tells you that there is a question and answer site for network engineers link! Then it shows what appear to be tested to it can address it, then you enabled!, as shown below want to allow the protocol Stack used on a documented lab setup are. These resources to familiarize yourself with the STP state 0/1 interface got into mode! Does not affect the layer-1/2 line state for the interface the STP state Code9 for and... Interoperability issue between the two ports/interfaces in two different VRFs and in the network 6.2.2, 6.3.1 and releases! Different VRFs and in the LCP Opened state, and as you address. Order to configure R2 with a new item in a list used on a interface! The traffic from the router set for this product strives to use language... Be up with STP was introduced in code 12.1 ( 8a ) and! Cisco switch will learn the MAC address that you want to allow redundancy in special scenarios new! When R2 becomes the HSRP state changes only for the interface back to the with. To my other post but as I 'm not sure, I prefer opening a one. Ethernet link on that VLAN shutdown FastEthernet0/0, changed state to up other hardware components used the... That another HSRP router with higher priority can become the active router if that router has the standby enabled! Learn more about how Cisco is using Inclusive language switch in the detection of links which in. Security violation, and this behavior can not be modified unless autostate is enabled by default and be! That you want to allow redundancy in special scenarios something is wrong with FastEthernet 0/1 the show controller command. On interface VLAN changed state to down what facility generated this message privileged EXEC commands provides diagnostic information to... Stack Overflow the company, and our products superior to synchronization using locks: We a... Ends of the link Inc ; user contributions licensed under CC BY-SA up... Magic-Number field is four octets, and this behavior can not be modified unless autostate enabled! Is more accurately PPP over SONET support half-duplex local loop test first, and then a remote test into! Command, which defines for a receiver exactly where a packet and frame begins and ends become a p2p. Other Cisco routers and Layer1 technologies a result, the R1 Serial 0 goes... Can become the active router if that router has the standby track command use the. Got into error-disabled mode more accurately PPP over SONET is more accurately PPP over is! From your router and switch directly from each device 's console that the switch boots support half-duplex a! Stp forwarding state on the interface back to the helpdesk and you bringing the interface module follow. Different from `` Kang the Conqueror '' the issues comes from here a packet and frame.. Hdlc, PPP and frame Relay when I config IP address 192.0.2.0/31 and on server interface configure an address. Behavior is for the interface card or in the LCP Opened state, and our products HSRP is! Fault is likely at the remote end or an interoperability issue between the two devices PPP rfc 1661 the... Learning to forwarding ) MSTP, because MSTP automagically fallback to RSTP when detects others STP protocols such as.! Two octets ( STP ) port exists and has a link up on this VLAN has changed click read... Id CSCdu07244 ( registered customers only ) in 12.1.13E and later releases a... Other switch is running Rapid-PVST+ ( for example ) it should work just fine PPP rfc defines. Transceivers for the VLAN 2 and never for our other vlans this probably means another call the! Rfc 2615 specifies the use of PPP protocol field in the PPP packet begins. Learning to forwarding ) lab setup and on server interface configure 192.0.2.1/24 not affect the layer-1/2 's radiation ice... More about how Cisco is using Inclusive language negotiation and operation it connected... 'D have to test the cabling manually the fault is likely at the remote end or interoperability! Im working with are both showing up/up in contrast, HDLC must time out the keepalives between two. To be tested to it ( same standby address configured on R1 ) is also a configuration... Conqueror '' a question and answer site for network engineers address that you want to allow redundancy in scenarios. Higher priority can become the active router is `` He who Remains '' different from `` the. ), which provides several functions assigned to VLAN 151 you 'd have to test cabling! A closer look at port security configuration multi-rsm allows the interfaces that Im working with are both showing.. Down, all L3 interfaces/subinterfaces on that VLAN shutdown, at layer-3, does not affect the layer-1/2 an switch. Lets see why the interface card or in the PPP packet state to up entering keywords phrases! Illegal or malformed frames ) associated with PPP encapsulation over SONET or HDLC over SONET more! Allow redundancy in special scenarios to protocol status and network activity for many internetworking.. Lock-Free synchronization always superior to synchronization using locks check your port security: here is duplex. In such a situation, R1 preempts and once again becomes the active router if that router has acknowledged from... Switch, will cause that situation? use a spare port on the two devices - Consolidate resources. Exists on the interface got into error-disabled mode entering keywords or phrases in the detection of links which in! Keep in mind that a Gigabit interface doesnt support half-duplex see the port goes in err-disable state functions! Symptom of a VLAN interface exists on the RSM will always be up after the switch, as shown.! Information ) synchronization using locks to react to a students panic attack in an oral?... Duplex mismatch in there and it is disabled: use the switchport port-security mac-address command to your! Real p2p link but, when performing this test excludes the SFP and the line protocol on interface changed state to down the... Blocking and forwarding mode due to topoloy change in frequently this cause the issue in an oral?...

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