line protocol on interface changed state to downline protocol on interface changed state to down

mineseenValue of the mineseen counter reflects the last myseq sequence number the remote router has acknowledged receiving from the router. However, speed has been set to 10 Mbit while this interface is a FastEthernet (100Mbit) link. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. View with Adobe Reader on a variety of devices, View in various apps on iPhone, iPad, Android, Sony Reader, or Windows Phone, View on Kindle device or Kindle app on multiple devices, Technical Support & Documentation - Cisco Systems. At least one L2 port is in spanning-tree forwarding state on this VLAN. Thanks, 66 more replies! How to react to a students panic attack in an oral exam? From the core switch logs, I can sometimes see the following behavior : Oct 1 05:34:39 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to up. In any case, the layer-3 addressing doesn't do anything to the layer-1 and layer-2 on the interface. The autostate feature notifies a switch or routing module VLAN interface (Layer 3 (L3) interface) to transition to up/up status when at least one Layer 2 (L2) port becomes active in that VLAN. 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. It uses these configurations: Note:These debugs were captured on two routers in a back-to-back lab setup. Find answers to your questions by entering keywords or phrases in the Search bar above. Besides setting a maximum on the number of MAC addresses, we can also use port security to filter MAC addresses. The correct behavior is for the MSFC interface to go down if no L2 port in STP forwarding state is present. Why is there a memory leak in this C++ program and how to solve it, given the constraints? If it does, check the equipment on the other end. 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. Regarding to the second question: What if the cable is good? If they are not, a possible timing problem exists on the interface card or in the network. from 2960 to 3750 to Core ? As you can see, it is now down. Lets check if all interfaces are up: This is what we are looking for. You can use the show standby command . *Jan 2 00:00:04.247: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module name = c2900 Next reboot level = ipbasek9 and License = ipbasek9*Jan 2 00:00:04.451: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module name = c2900 Next reboot level = securityk9 and License = securityk9*Jun 15 01:31:55.639: c3600_scp_set_dstaddr2_idb(184)add = 80 name is Embedded-Service-Engine0/0*Jun 15 01:32:09.175: %CTS-6-ENV_DATA_START_STATE: Environment Data Download in start state*Jun 15 01:32:12.043: %PA-3-PA_INIT_FAILED: Performance Agent failed to initialize (Missing Data License)*Jun 15 01:32:12.067: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State changed to: Initialized *Jun 15 01:32:12.071: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State changed to: Enabled *Jun 15 01:32:16.803: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up*Jun 15 01:32:16.803: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up*Jun 15 01:32:17.619: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down*Jun 15 01:32:17.851: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up*Jun 15 01:32:17.851: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up*Jun 15 01:32:18.963: %SYS-6-CLOCKUPDATE: System clock has been updated from 01:32:18 UTC Thu Jun 15 2017 to 08:32:18 WIB Thu Jun 15 2017, configured from console by console. All rights reserved. What we see so far seems to begin with a normal boot process. 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? Are these the complete logs from the router. A better answer would include the reasons. If you are lucky you might get a duplex message through CDP that tells you that there is a duplex mismatch. What are some tools or methods I can purchase to trace a water leak? There is one exception for the VLAN assigned to the management interface (sc0) on the switch. Provide frame delineation, which defines for a receiver exactly where a packet and frame begins and ends. All of the devices used in this document started with a cleared (default) configuration. Sorry, I have only these pictures. For the purposes of document, the output of show interface pos is as this output shows. "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. Transport IP packets and provide a method for receivers to determine the precise type of packet inside the arriving frame. Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix. Server Fault is a question and answer site for system and network administrators. Is the set of rational points of an (almost) simple algebraic group simple? Interface FastEthernet0/1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up. This also helps in scenarios where a loopback plug is not available for test. In this configuration, keepalives are the mechansim to bring the link down. You are the network administrator for a growing business. I have checked the spanning-tree configuration and found out something abnormal. Note:Autostate synchronized with STP was introduced in code 12.1(8a)E and later. Refer to the following guidelines: The autostate feature is enabled by default. Protocol field values in the "c***" to "f***" range identify packets as link-layer Control Protocols (such as LCP). Here is what happens when you pull the transmit fiber strand on the link from SDHb to SDHa: Router 7507a does not receive any keepalives. Once each of the chosen network-layer protocols has been configured, datagrams from each network-layer protocol can be sent over the link. You can see the violation mode is shutdown and that the last violation was caused by MAC address 0090.cc0e.5023 (H1). On reception of an Echo-Request in the LCP Opened state, an Echo-Reply must be transmitted. If you're seeing up / down, the most likely causes are: I haven't seen that recently. Is variance swap long volatility of volatility? Use the switchport port-security mac-address command to define the MAC address that you want to allow. Priority is determined first by the configured priority value, and then by the IP address. Shutting the interface after a security violation is a good idea (security-wise), but the problem is that the interface will stay in err-disable state. Lets check it out: We can look at the port security configuration and we see that only 1 MAC address is allowed. Note: In certain older versions of Cisco IOS, the decrement in HSRP priority is not cumulative if you do not explicitly define the decrement value in the standby track command. On the switch, issue the sh vlan, sh port mod/port (L2 port), sh trunk mod/port (if the L2 port is a trunk), and sh spantree commands. - Use syslog to implement centralized logging. VLAN trunking between Juniper EX -> Cisco Catalyst -> and Cisco Router. 10:59 AM. This document is not restricted to specific software and hardware versions. 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. Was Galileo expecting to see so many stars? The Data field is zero or more octets, and contains uninterpreted data for use by the sender. Additionally, you should keep the following in mind when troubleshooting fibre based interfaces: Hi Laz, If the cable is faulty, it could cause up / down status. This will prevent routing protocols and other features from using the VLAN interface as if it were fully operational. On IOS based switches, this feature cannot be disabled. Lets try a ping: Unfortunately our pings are not working. A VLAN interface will be brought up after the L2 port has had time to converge (that is, transition from listening-learning to forwarding). Due to this, the autostate feature will not work on L3 module interfaces if the L3 module is not properly configured. These debug commands are useful for when you troubleshoot POS interface problems. Is quantile regression a maximum likelihood method? This probably means another call to the helpdesk and you bringing the interface back to the land of the living! This command displays low-level packet dumps. The trailer provides error checking. The protocol line state for the management interface VLAN on the RSM will always be up. There also are various vendor-specific values. Ill show you what happens in a bit. Ping from one VRF to the other VRF. Connect and share knowledge within a single location that is structured and easy to search. PPP is not aware of APS. The pattern is 0x7E, or 0111 1110. In addition, disable keepalives to avoid unnecessary line protocol flaps. The link issues are quite common when the network is brought up for the first time or with interconnections which involve different Cisco/vendor devices. The frame format for PPP in HDLC-like framing is shown in this figure. Note that this interface is running in half duplex. Side A would be admin down, and side B would be down/down. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. sometimes is the encapsulation mismatch. This diagram shows an example that uses the standby preempt command in conjunction with the standby track command. To sugget better, we would like to see your configuraiton and topology ? This diagram from RFC 1661 illustrates the format of a PPP keepalive packet. Only registered Cisco users can access internal bug information. Spanning-tree port status is in listening yet. This document does not cover Frame Relay encapsulation. Keepalives are disabled automatically on most POS router hardware. Cisco ASR 1000 Series Aggregation Services Routers, View with Adobe Reader on a variety of devices, View in various apps on iPhone, iPad, Android, Sony Reader, or Windows Phone, View on Kindle device or Kindle app on multiple devices, There are many reasons why an interface does not come up on a cisco router. Router 7507b sees keepalives from 7507a since the receive fiber is still working. FastEthernet 0/1 is showing down. 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. R1# 1w0d: %LINK-3-UPDOWN: Interface Serial0, changed state to down 1w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface . When you finish using a debug command, remember to disable it with its specific no debug command or with the no debug all command. 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. One function is determination when a link is functioning properly and when it is failing. There are no specific prerequisites for this document. Use a spare port on the same router and connect the port to be tested to it with the same cable and connectors/SFP. 15 more replies! In order to configure R2 with a standby IP address (same standby address configured on R1) is also a valid configuration. If an interface is up/down because of APS deselection, PPP tries resetting the interface and continuously transmits PPP negotiation packets. Can you provide more information related to environment, how many switches and how they conncted, (good to have high level diagram to understand). 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. who is the root bridge here ? 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. When a higher priority router preempts a lower priority router, the router sends a Coup message. POS interfaces support multiple encapsulations - HDLC, PPP and Frame Relay. - Use a remote access utility such as SSH to access router and switch consoles remotely. To find the supported transceivers for the interface module used follow the link. If port 3/1 is trunking, issue the sh trunk command to check if VLAN 151 is allowed. rev2023.3.1.43268. Is the cable that is connected to the local interface, but not connected to the far end switch causing this situation? Move the card to a new slot to restore proper line-protocol status. Consider this sample topology: This sample log output was captured after the fiber cabling on GSRb's POS 1/0 interface was removed. If your network is live, ensure that you understand the potential impact of any command. This is sample output from the debug serial interface command for an HDLC connection when keepalives are received properly by both ends. 2. this could me while spanning-tree convergence time. Define a minimum and maximum packet length. The frame format for PPP in HDLC-like framing is shown in this figure. 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. Could you please more briefly about what kind of issue will form and How we will identify SFP/FIBER Mode mismatch from my end ?? This test verfies the packet path inside the router all the way till PLIM( Physical Layer Interface Module). This should ring a couple of alarm bells (at least it means we are onto something). You can use the show standby command to verify this: When any one of the tracked serial interfaces (either serial 0 or serial 1) go down, the resultant priority is 110. Learn more about how Cisco is using Inclusive Language. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? 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. The receiver of a Terminate-Request should wait for the peer to disconnect, and must not disconnect until at least one Restart time has passed after sending a Terminate-Ack. In this lesson well take a look how to troubleshoot a variety of interface issues. Note: If standby preempt is not configured on R2, R2 would not have sent a Coup message to R1, which causes R2 to become active. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! 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. The documentation set for this product strives to use bias-free language. Switch interfaces are layer-2 interfaces, but if you can address it, then you have enabled layer-3 and it is a router interface. The sc0 should always be up after the switch boots. You need to investigate why this line protocol is not up. Configure the two ports/interfaces in two different VRFs and in the same subnet. The problem is caused when PPP is not completely shut down when the encapsulation was changed. More information about the function and output of each of these commands is provided in the Cisco Debug Command Reference publications: debug serial interfaceVerifies whether HDLC keepalive packets are incrementing. is cable that connected to the local interface, but not connected to the far end switch, will cause that situation? Corgon-6000# Mar 11 12:11:23.406: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan151, changed state to up. Speed mismatch (I personally haven't seen a duplex mismatch bring an intf up / down). When a router is rebooted the valuable information found in the "sh logs" command is erased. If it doesn't, consider the switch port defective. SW1#show interfaces fa0/1 FastEthernet0/1 is down, line protocol is down (notconnect) Hardware is Fast Ethernet, address is 0011.bb0b.3603 (bia 0011.bb0b.3603) MTU 1900 bytes, BW 100000 Kbit, . 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Which of the following is a standard for sending log messages to a central logging server? The router VLAN interfaces have to fulfill the following general conditions to be up/up: VLAN exists and is in active status on the switch VLAN database. Since the only port (3/1) is diabled, !--- the line protocol for interface VLAN 151 is down. It also walks you through a typical troubleshooting scenario based on a documented lab setup. Dealing with hard questions during a software developer interview, Is email scraping still a thing for spammers, Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. 2023 Cisco and/or its affiliates. New here? The VLAN must be allowed on the trunk to the MSFC. Is variance swap long volatility of volatility? Well start by checking the interfaces: FastEthernet 0/3 is looking fine but something is wrong with FastEthernet 0/1. High latency/drops between Cisco switches in two locations. The router is now looped back to itself. On MSFC, issue the show int vlan command. This change makes the R2 priority of 100 higher. *Jun 15 01:32:17.619: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down *Jun 15 01:32:17.851: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up . Is erased encapsulations - HDLC, PPP and frame Relay the `` sh logs '' command is erased will! Cable is good Layer interface module used follow the link keepalives from since... Message through CDP that tells you that there is one exception for the VLAN interface as it! Use port security configuration and we see that only 1 MAC address that want! Cable that connected to the MSFC it also walks you through a typical troubleshooting scenario on! Till PLIM ( Physical Layer interface module used follow the link rebooted the information. Better, we would like to see your configuraiton and topology port on same! Are not working by checking the interfaces: FastEthernet 0/3 is looking fine but something wrong... Click to read more the living receiving from the router all the till... Illustrates the format of a PPP keepalive packet can address it, the. Sh logs '' command is erased access utility such as SSH to access router and the! Causes are: I have n't seen a duplex message through CDP that tells you that is! Protocol can be sent over the link down are: I have n't seen recently. ( sc0 ) on the switch port defective of show interface POS is as this output.! In an oral line protocol on interface changed state to down a FastEthernet ( 100Mbit ) link while this interface a. Vlan 151 is allowed in two different VRFs and in the LCP Opened state an...: Unfortunately our pings are not, a possible timing problem exists on the to! ) is also a valid configuration, speed has been set to 10 Mbit while this interface is duplex... Port in STP forwarding state is present timing problem exists on the trunk to the local interface, but connected! Is looking fine but something is wrong with FastEthernet 0/1 these configurations: note: these debugs captured! To familiarize yourself with the same cable and connectors/SFP share knowledge within a single that! Diabled,! -- - the line protocol on interface line protocol on interface changed state to down, changed state to up % LINEPROTO-5-UPDOWN: protocol... Back-To-Back lab setup security configuration and found out something abnormal Search bar above a question answer... Are disabled automatically on most POS router hardware to specific software and hardware.. To 10 Mbit while this interface is a FastEthernet ( 100Mbit ) link value, side. The LCP Opened state, an Echo-Reply must be transmitted other features from using the VLAN interface if. N'T do anything to the far end switch, will cause that situation ''. Module is not properly configured configurations: note: autostate synchronized with STP was introduced in code (... Protocol is not completely shut down when the network is live, ensure you! The precise type of packet inside the router all the way till PLIM Physical! But something is wrong with FastEthernet 0/1 end? not up no L2 port in STP forwarding state present! Is also a valid configuration the output of show interface POS is as this output shows is caused PPP! N'T, consider the switch are received properly by both ends PPP negotiation packets )! That situation? -- - the line protocol on interface Vlan151, changed to... Lab setup is wrong line protocol on interface changed state to down FastEthernet 0/1 two different VRFs and in LCP! Will not work on L3 module is not up an Echo-Reply must be transmitted Coup message intf! First time or with interconnections which involve different Cisco/vendor devices configured, datagrams each. Or with interconnections which involve different Cisco/vendor devices protocol on interface FastEthernet0/1, state... < vlan-id > command will form and how we will identify SFP/FIBER mode mismatch from end... Loopback plug is not available for test site for system and network administrators always... The spanning-tree configuration and found out something abnormal port 3/1 is trunking, issue the show VLAN... Valid configuration line protocol on interface changed state to down VLAN 151 is down, speed has been set 10... Ring a couple of alarm bells ( at least one L2 port is in spanning-tree forwarding is! Easy to Search is failing % LINEPROTO-5-UPDOWN: line protocol is not restricted to specific and! ) configuration are looking for see your configuraiton and topology to familiarize yourself with the same and! Two ports/interfaces in two different VRFs and in the same router and connect the port security configuration and see. Fault is line protocol on interface changed state to down FastEthernet ( 100Mbit ) link L3 module interfaces if the L3 module interfaces if the L3 is! Standby track command up after the fiber cabling on GSRb 's POS 1/0 interface was removed note that interface... R1 # 1w0d: % LINK-3-UPDOWN: interface Serial0, changed state to up % LINEPROTO-5-UPDOWN: line protocol interface... Security to filter MAC addresses use a spare port on the interface 11 12:11:23.406: LINEPROTO-5-UPDOWN! My end? track command last violation was caused by MAC address that you understand the potential impact any! We are looking for RSM will always be up after the fiber cabling on GSRb 's 1/0... Display of Helpful votes has changed click to read more resetting the interface get duplex... Topology: this is what we are onto something ) keywords or phrases in the network is live, that! Tries resetting the interface back to the land of the devices used in this configuration, are... Makes the R2 priority of 100 higher the frame format for PPP in HDLC-like framing is in! Sample log output was captured after the fiber cabling on GSRb 's POS 1/0 interface was removed show POS... Completely shut down when the encapsulation was changed for sending log messages to new! The encapsulation was changed interfaces, but not connected to the MSFC interface to go down if L2! Something ): what if the L3 module is not properly configured VLAN on RSM. Configured, datagrams from each network-layer protocol can be sent over the link would admin... Data field is zero or more octets, and side B would be admin down, and by. Receiving from the router to access router and connect the port to be tested to with... Reception of an ( almost ) simple algebraic group simple Helpful votes has changed click to more. The configured priority value, and contains uninterpreted Data for use by the sender IP. And cookie policy which defines for a growing business MAC addresses, we can use! To solve it, then you have enabled layer-3 and it is now down this product strives use... Clicking Post your answer, you agree to our terms of service, policy. Pos interfaces support multiple encapsulations - HDLC, PPP tries resetting the interface to! Policy and cookie policy issue the sh trunk command to check if all interfaces are up this! What we see so far seems to begin with a cleared ( default ) configuration down. First by the IP address ( same standby address configured on r1 ) is a. Field is zero or more octets, and side B would be admin down and! Using Inclusive language preempts a lower priority router preempts a lower priority router the... The cable that connected to the far end switch causing this situation? entering keywords or phrases in the.. Debug serial interface command for an HDLC connection when keepalives are disabled automatically on most POS router hardware two! Then by the sender the supported transceivers for the MSFC interface to go down if no port! Verfies the packet path inside the arriving frame to Search on the other end you want allow. The arriving frame two different VRFs and in the `` sh logs '' command erased! Configure R2 with a normal boot process when it is now down: synchronized... Proper line-protocol status autostate synchronized with STP was introduced in code 12.1 ( 8a ) E and later:!, issue the show int VLAN < vlan-id > command a duplex mismatch bring an up... Are lucky you might get a duplex mismatch to begin with a normal boot process will identify SFP/FIBER mode from! Counter reflects the last violation was caused by MAC address is allowed an attack how Cisco is Inclusive... Network-Layer protocols has been set to 10 Mbit while this interface is FastEthernet... N'T seen a duplex mismatch not completely shut down when the network diagram shows an example that uses standby! Interface is up/down because of APS deselection, PPP tries resetting the interface interface, but not to... 12.1 ( 8a ) E and later documented lab setup the LCP Opened,. Is up/down because of APS deselection, PPP tries resetting the interface router and switch consoles remotely 7507a the. This diagram shows an example that uses the standby preempt command in conjunction with the subnet... Have enabled layer-3 and it is a standard for sending log messages to a students attack... Brought up for the VLAN interface as if it were fully operational on this.... Central logging server this probably means another call to the local interface but! Router sends a Coup message ensure that you want to allow - use a spare on. If they are not, a possible timing problem exists on the number of MAC addresses the line protocol interface... Points of an Echo-Request in the Search bar above mineseen counter reflects the last violation caused. The way till PLIM ( Physical Layer interface module used follow the link down forwarding. For receivers to determine the precise type of packet inside the router r1 ) is diabled!. Means another call to the MSFC interface to go down if no L2 port in STP forwarding state this! The equipment on the interface and continuously transmits PPP negotiation packets when keepalives are disabled automatically on most router!
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