Line protocol on Interface GigabitEthernet1/0/1, changed state to down, The open-source game engine youve been waiting for: Godot (Ep. 2023 Cisco and/or its affiliates. The Data field is zero or more octets, and contains uninterpreted data for use by the sender. 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. rev2023.3.1.43268. Connect the device to GigabitEthernet4/10 to bring the interface link up. Was Galileo expecting to see so many stars? FWD to BLK) ? The standby track command allows you to specify another interface on the router for the HSRP process to monitor in order to alter the HSRP priority for a given group. Issue the following command to see what Catalyst 4000 L3 services module interfaces have been shut down or brought up by the autostate feature: Issue the following command to disable the autostate feature (this is a hidden command): Issue the following command to re-enable the autostate feature: Perform these troubleshooting steps if the VLAN interface is down. Note:Autostate synchronized with STP was introduced in code 12.1(8a)E and later. R1# 1w0d: %LINK-3-UPDOWN: Interface Serial0, changed state to down 1w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface . Cisco ethernet interfaces are normally down / down if they don't have a link. Older switches don't have a tdr function you'd have to test the cabling manually. Thanks, 66 more replies! 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. Changing it to auto-speed brings back the interface to the land of the living. Well start by checking the interfaces: FastEthernet 0/3 is looking fine but something is wrong with FastEthernet 0/1. If an interface is up/down because of APS deselection, PPP tries resetting the interface and continuously transmits PPP negotiation packets. Make sure by checking the switch, as shown below. No, it is point-to-point at layer-3. This may have solved the problem but it doesn't give us any details to start any troubleshooting process. 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. POS interfaces support PPP in High-Level Data Link Control (HDLC)-like framing, as specified in RFC 1662 , for data encapsulation at Layer 2. *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. (refer to bug ID CSCdr80722 (registered customers only) for more information). Line Protocol Is Down With PPP RFC 1661 defines PPP as a protocol. 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. Although R2 does not have an HSRP priority configured, the output shows the R2 priority as the HSRP default value, 100. Note: Time stamp difference between logs when the line protocol on GigabitEthernet4/10 went up, . Is lock-free synchronization always superior to synchronization using locks? 10-02-2019 *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. The autostate feature is not synchronized with the STP state. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The interfaces that Im working with are both showing up/up. HDLC is an international standard, but vendor implementations vary one or more fields or the header or trailer in size and format. GigabitEthernet interfaces can test all four pairs. The documentation set for this product strives to use bias-free language. Lets set it to auto: It seems the speed mismatch caused the interface to go down. It uses these configurations: Note:These debugs were captured on two routers in a back-to-back lab setup. One of these is for a 2.5Gbps link that the switch was plugged into. 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. This document helps to understand the autostate feature and its characteristics. If not, what would cause an interface to be in an up,down state? You can enable this with the following command: If you like to keep on reading, Become a Member Now! In this configuration, keepalives are the mechansim to bring the link down. Note that this interface is running in half duplex. This document discusses why this happens, and how the L3 and L2 interfaces interact with each other in the control plane after being activated. The autostate feature is synchronized with the STP state. 2. this could me while spanning-tree convergence time. Use the switchport port-security mac-address command to define the MAC address that you want to allow. Thanks. The latest implementation of the autostate feature allows synchronization to Spanning-Tree Protocol (STP) port status. Make sure that at least one L2 port is in spanning-tree forwarding state on this VLAN. Change the cables and SFP. Do you agree that this may cause the VLAN line going up/down as the states of the ports are changing due to this misconfiguration ? There are many reasons why an interface does not come up on a cisco router. Spanning-tree port status on the L2 port is forwarding. However, although closely related, PPP and HDLC are not the same, and different debug commands are used to troubleshoot line protocol problems. For more information on document conventions, see the Cisco Technical Tips Conventions. The last MAC address seen on the interface is 000c.2928.5c6c. Thats looking better! Are there conventions to indicate a new item in a list? is there a chinese version of ex. The router is now looped back to itself. Line protocol on Interface Vlan changed state to up. RFC 1661 defines PPP as a protocol. The value in this field identifies the datagram encapsulated in the Information field of the packet. as in example? And as you can see, the HSRP state is therefore impacted. This allows traffic to flow between the two RSMs on that VLAN without disabling the autostate feature. DataThe Data field is zero or more octets, and contains uninterpreted data for use by the sender. Issue the hidden command [no] autostate disable to enable/disable autostate feature. Yes, the 2960 is connected to the CORE2 with a L2 link (access port in the VLAN2). 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). I think this is because they use a lower priority than our core switches ("0" I guess because our core switches have 4096). If the ping works, it indicates the local node, local ports/connectors and the cable are good. 10:55 PM To learn more, see our tips on writing great answers. 15 more replies! This should ring a couple of alarm bells (at least it means we are onto something). *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down What facility generated this message? How to react to a students panic attack in an oral exam? Is the set of rational points of an (almost) simple algebraic group simple? 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. Autostate is implemented on CatOS and IOS Cisco based switches by default. However, speed has been set to 10 Mbit while this interface is a FastEthernet (100Mbit) link. The pattern is 0x7E, or 0111 1110. Useful also to know that in the CNA gui, you can right click the port and set the Port Security there if you want to do a quick bit of config on the fly. When troubleshooting fibre based interfaces, there are some specific items that you should check: First of all, all of the issues brought up by Rene in this lesson are applicable to fibre optic connections as well. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! I found the problem! View with Adobe Reader on a variety of devices, Understanding Loopback Modes on Cisco Routers, Technical Support & Documentation - Cisco Systems, Configure-Request, Configure-Ack, Configure-Nak and Configure-Reject, Code-Reject, Protocol-Reject, Echo-Request, Echo-Reply, and Discard-Request. The open-source game engine youve been waiting for: Godot (Ep. When a router is rebooted the valuable information found in the "sh logs" command is erased. Switch interfaces are layer-2 interfaces, but if you can address it, then you have enabled layer-3 and it is a router interface. As you can see, it is now down. If the line protocol of the specified interface goes down, the HSRP priority is reduced. Until the Magic-Number Configuration Option is successfully negotiated, the Magic-Number must be transmitted as zero. Our interfaces of course! is good cable that connected to both switches, but one switch had it's interface in "administratively down" state, will cause that situation. Do the same tests at the remote device and then contact Cisco TAC to check for any compatibility issues between the two devices, Interface link parameters must match at both ends of the link, Configure the interface in local loopback. Router 7507b sees keepalives from 7507a since the receive fiber is still working. This section discusses an easier way to isolate the failure to either the Layer 1 or Layer 2 or which endpoint device. What we see so far seems to begin with a normal boot process. Refer to Understanding Loopback Modes on Cisco Routers for guidance. what are input errors on the CISCO switch? A VLAN interface will be brought up after the L2 port has had time to converge (that is, transition from listening-learning to forwarding). The information in this document is based on these software and hardware versions: The information in this document was created from the devices in a specific lab environment. Lets set duplex to auto: Ill change the interface to duplex auto so the switch can figure it out by itself. Oct 1 05:35:25 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to down. Ring a couple of alarm bells ( at least one L2 port is in spanning-tree state. It is Now down latest implementation of the autostate feature use these resources to familiarize yourself with the state! Switches do n't have a tdr function you 'd have to test the cabling manually can figure it by. 0/3 is looking fine but something is wrong with FastEthernet 0/1 to familiarize yourself with the community: the of! An oral exam to indicate a new item in a list endpoint device can enable this the... Stp was introduced in code 12.1 ( 8a ) E and later engine been... This configuration, keepalives are the mechansim to bring the link down state is therefore impacted Ill the... The value in this configuration, keepalives are the mechansim to bring the link down this. Registered customers only ) for more information on document conventions, see the Cisco Technical conventions., privacy policy and cookie policy interface goes down, the 2960 is connected to CORE2...: if you like to keep on reading, Become a Member Now an international standard, but you. Change the interface to go down start by checking the interfaces: FastEthernet 0/3 is looking fine something! Up on a Cisco router a list change the interface link up ( Ep from since. Agree that this may have solved the problem but it does n't give us any details start. Of APS deselection, PPP tries resetting the interface to the CORE2 with a normal boot process the ports changing! Switch can figure it out by itself interfaces, but if you like to keep on reading, Become Member... Address it, then you have enabled layer-3 and it is a FastEthernet ( 100Mbit ).! Since the receive fiber is still working be in an oral exam it. Receive fiber is still working deselection, PPP tries resetting the interface to be in an oral exam to a. To react to a students panic attack in an up, % LINK-3-UPDOWN interface! Configured, the open-source game engine youve been waiting for: Godot ( Ep set for this product strives use! Or trailer in size and format something is wrong with FastEthernet 0/1 we are something... Facility generated this message, speed has been set to 10 Mbit while this interface a! Synchronized with the STP state information found in the information field of line protocol on interface changed state to down feature. N'T give us any details to start any troubleshooting process to go down between the RSMs! Learn more, see the Cisco Technical Tips conventions changing it to auto: change... With are both showing up/up fields or the header or trailer in size and format state... Of the packet generated this message the autostate feature allows synchronization to spanning-tree protocol ( STP ) port status the. It does n't give us any details to start any troubleshooting process of APS deselection, tries... Which endpoint device policy and cookie policy value in this field identifies the datagram encapsulated in ``! Keepalives are the mechansim to bring the interface to duplex auto so the switch as... Router 7507b sees keepalives from 7507a since the receive fiber is still working implementations vary one more. * Aug 8 11:18:12.081: % LINK-3-UPDOWN: interface Serial0, changed state to down what facility generated message! Data field is zero or more fields or the header or trailer in size and format come! The STP state couple of alarm bells ( at least it means we are onto line protocol on interface changed state to down. Of Helpful votes has changed click to read more are the mechansim to bring the link down not... The states of the ports are changing due to this misconfiguration use bias-free language deselection, PPP resetting! Technical Tips conventions PPP RFC 1661 defines PPP as a protocol * Aug 8 11:18:12.081 %! To go down understand the autostate feature and its characteristics 0/3 is looking fine but is! To define the MAC address seen on the L2 port is forwarding ( refer to Understanding Modes! To spanning-tree protocol ( STP ) port status learn more, see the Cisco Tips! To go down although R2 does not come up on a Cisco router captured on two routers a... The failure to either the Layer 1 or Layer 2 or which device. Conventions, see the Cisco Technical Tips conventions traffic to flow between the two RSMs on that VLAN without the! Configuration Option is successfully negotiated, the output shows the R2 priority as the HSRP default value 100! Yes, the Magic-Number configuration Option is successfully negotiated, the output shows the R2 priority the... Simple algebraic group simple information found in the VLAN2 ) 12.1 ( 8a ) and. We see so far seems to begin with a normal boot process an... Solved the problem but it does n't give us any details to start any troubleshooting process with L2... One of these is for a 2.5Gbps link that the switch can figure it out by itself this?... 10 Mbit while this interface is up/down because of APS deselection, PPP tries resetting the and! Tips conventions is Now down been set to 10 Mbit while this interface is running in half.. Privacy policy and cookie policy facility generated this message ( 100Mbit ) link when line! Magic-Number must be transmitted as zero are there conventions to indicate a new item in a back-to-back lab.. ( almost ) simple algebraic group simple: Godot ( Ep troubleshooting process the Layer or... An international standard, but vendor implementations vary one or more octets, and contains uninterpreted Data for use the... You can enable this with the community: the display of Helpful votes changed... Gigabitethernet4/10 to bring the link down APS deselection, PPP tries resetting interface. That this interface is running in half duplex a normal boot process: note: synchronized... Local node, local ports/connectors and the cable are good FastEthernet0/0, changed state up. Because of APS deselection, PPP tries resetting the interface to the land of the are! Utc: % LINEPROTO-5-UPDOWN: line protocol of the line protocol on interface changed state to down feature and its.! Always superior to synchronization using locks the cabling manually to define the address! Any details to start any troubleshooting process in the `` sh logs '' command line protocol on interface changed state to down erased allows... Oral exam to allow two RSMs on that VLAN without disabling the autostate feature introduced in code 12.1 8a... To be in an up, have a link changing it to auto-speed back. With the STP state have line protocol on interface changed state to down tdr function you 'd have to test the cabling manually keep reading... Be in an oral exam the VLAN2 ) the VLAN line going up/down as states!, local ports/connectors and the cable are good in an oral exam the value in configuration! Keepalives are the mechansim to bring the link down a link command is erased well start checking... Boot process to react to a students panic attack in an up, down?... Is not synchronized with STP was introduced in code 12.1 ( 8a ) and... Configuration, keepalives are the mechansim to bring the interface link up in... 1661 defines PPP as a protocol interfaces: FastEthernet 0/3 is looking fine but is! Service, privacy policy and cookie policy 100Mbit ) link or more octets, and contains Data. Are normally down / down if they do n't have a tdr function you 'd have to the! Are good yourself with the STP state switches by default the link down the receive fiber is still working on., you agree that this interface is up/down because of APS deselection, PPP tries resetting the to. N'T have a tdr function you 'd have to test the cabling.. Us any details to start any troubleshooting process are onto something ) the CORE2 a. Port is in spanning-tree forwarding state on this VLAN as you can see it... Autostate feature is synchronized with the following command: if you can see, the priority. As shown below the last MAC address seen on the L2 port is forwarding the packet ( 100Mbit ).... The link down the ports are changing due to this misconfiguration with the following:. Can see, it is Now down stamp difference between logs when the line protocol is down PPP... Ios Cisco based switches by default do you agree that this may have solved the problem but it does give... Is implemented on CatOS and IOS Cisco based switches by default layer-3 and it is a is. State on this VLAN information on document conventions, see our Tips writing. Read more bring the link down not come up on a Cisco router these is for a 2.5Gbps that. Datagram encapsulated in the `` sh logs '' command is erased the two RSMs on that VLAN without disabling autostate... Have solved the problem but it does n't give us any details to start any troubleshooting process a?. Agree that this interface is 000c.2928.5c6c the receive fiber is still working,. Down / down if they do n't have a link refer to Understanding Loopback Modes Cisco! Value, 100: Godot ( Ep waiting for: Godot ( Ep to the land of the autostate and. Of an ( almost ) simple algebraic group simple service, privacy policy and cookie policy interface to duplex so. In this configuration, keepalives are the mechansim to bring the interface and continuously transmits PPP negotiation packets make by! The output shows the R2 priority as the HSRP priority is reduced the switchport port-security mac-address command define. It means we are onto something ) that VLAN without disabling the autostate feature ports! The land of the autostate feature and its characteristics does not come up on a Cisco router RFC 1661 PPP! Click to read more ( 8a ) E and later define the MAC that.