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). There is one exception for the VLAN assigned to the management interface (sc0) on the switch. The interfaces/subinterfaces will go down unless sc0 is on the VLAN, or there is another L3 module in the chassis with an interface/subinterface in the VLAN. This problem is resolved in Cisco bug ID CSCdp86387 (registered customers only) . This document does not cover Frame Relay encapsulation. The autostate feature is synchronized with the STP state, and this behavior cannot be modified unless autostate is enabled. Share Improve this answer Asking for help, clarification, or responding to other answers. Click the card to flip Definition 1 / 4 There are many reasons why an interface does not come up on a cisco router. The documentation set for this product strives to use bias-free language. It might be easier if the interface could recover itself after a certain time. 09:22 AM If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. If the problem persists, check other hardware components. 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. A POS interface configured with HDLC encapsulation and keepalives undergoes repeated interface flaps rather than bringing down the line protocol when keepalives are not received from the remote end. During this time, you monitored log messages from your router and switch directly from each device's console. This probably means another call to the helpdesk and you bringing the interface back to the land of the living! In contrast, HDLC must time out the keepalives. 10-02-2019 There are no specific requirements for this document. if the cable is good, both sides will be down. *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. Refer to Troubleshooting Serial Line Problems for more information. Are these the complete logs from the router. 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. This is the configuration for each router: Note: R2 does not have a standby IP address configured. Trap logging: level informational, 44 message lines logged Logging Source-Interface: VRF Name: *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. What can I do? All of the devices used in this document started with a cleared (default) configuration. The router is now looped back to itself. - Consolidate network resources down to one or two switches. Move the card to a new slot to restore proper line-protocol status. Does Cast a Spell make you a spellcaster? RFC 1661 defines the Protocol field as one or two octets. Gongratulations Ren, here it is a very useful lesson. HDLC is an international standard, but vendor implementations vary one or more fields or the header or trailer in size and format. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down What facility generated this message? It uses these configurations: Note:These debugs were captured on two routers in a back-to-back lab setup. Line Protocol Is Down With PPP RFC 1661 defines PPP as a protocol. The end of the field is indicated by the Length. Since the only port (3/1) is diabled, !--- the line protocol for interface VLAN 151 is down. Connect and share knowledge within a single location that is structured and easy to search. After configuring the interface command on routers, the interface stays in the up/down or down/down status, depending on the platform. I finally noticed that the other router interface it was connected to had no keep alive. When R2 becomes the active router all the traffic from the hosts to the servers is routed through R2. The sender of the Terminate-Request should disconnect after receiving a Terminate-Ack, or after the Restart counter expires. The last MAC address seen on the interface is 000c.2928.5c6c. Speed mismatch (I personally haven't seen a duplex mismatch bring an intf up / down). Session into the MSFC and verify the status of the VLAN interface again. 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. Line protocol on Interface Vlan613, changed state to down *Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/ . Is quantile regression a maximum likelihood method? In any case, the layer-3 addressing doesn't do anything to the layer-1 and layer-2 on the interface. 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 debug serial interface to confirm this. Symptom: Dec 30 03:34:54: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/26, changed state to down Dec 30 03:35:04: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/26, changed state to up Dec 30 03:49:50: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/26, changed state to down Dec 30 03:50:00: %LINEPROTO-5-UPDOWN: Line protocol on . The number of distinct words in a sentence. If they are not, a possible timing problem exists on the interface card or in the network. Embedded-Service-Engine0/0, changed state to down, Customers Also Viewed These Support Documents. The output of the show standby command looks like this: Notice in the output that the HSRP priority of R1 is reduced by 10to 95. 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. Does Cosmic Background radiation transmit heat? Use show port-security interface to see the port security details per interface. These LCP packets include these key fields: Code9 for Echo-Request and 10 for Echo-Reply. Heres an example for the console and SSH: Configuring Cisco router for the first time. 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 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. All rights reserved. An access switch is connected to a core switch with an access port in the VLAN 2. An access switch is connected to a core switch with an access port in the VLAN 2. Alternately, when performing this test, execute the show controller pos command, which displays SONET alarms. When the difference in the values in the myseq and mineseen fields exceeds three, the line goes down and the interface is reset. 10:55 PM Change the cables and SFP. what are input errors on the CISCO switch? Glad to hear it was useful to you. PPP is not aware of APS. See the Magic-Number Configuration Option in RFC 1661 for further explanation. On the RSM, issue the show int command. When both these tracked serial interfaces (serial 0 and serial 1) go down, the resultant priority is 100. However the interface exists even if the module isn't present. Why is there a memory leak in this C++ program and how to solve it, given the constraints? There are no specific prerequisites for this document. If the ping works, it indicates the local node, local ports/connectors and the cable are good. Thanks, 66 more replies! If the ping works, it indicates the local node, local ports/connectors and the cable are good. The value in this field identifies the datagram encapsulated in the Information field of the packet. As you can see, it is now down. No, it is point-to-point at layer-3. Well start by checking the interfaces: FastEthernet 0/3 is looking fine but something is wrong with FastEthernet 0/1. Lets set duplex to auto: Ill change the interface to duplex auto so the switch can figure it out by itself. is there a chinese version of ex. A better answer would include the reasons. Configure the interface in local loopback. Sometimes people like to bring an extra switch from home to the office. 2023 Cisco and/or its affiliates. Let's take a closer look at port security: 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. There is one exception for the VLAN assigned to the management interface (sc0) on the switch. The sc0 should always be up after the switch boots. Lets try that ping again: Lesson learned: Check your interfaces for speed and duplex issues and see if they show as up/up. This interface, however, can be forced to administratively down. Would the reflected sun's radiation melt ice in LEO? Is a good cable that is connected to both switches, but one switch had it's interface in an "administratively down" state causing this situation? The data may consist of any binary value. If the cable is faulty, it could cause up / down status. At least one L2 (access port or trunk) port is in spanning-tree forwarding state on the VLAN. Customers Also Viewed These Support Documents. On reception of an Echo-Request in the LCP Opened state, an Echo-Reply must be transmitted. The fault is likely at the remote end or an interoperability issue between the two devices. 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. This change makes the R2 priority of 100 higher. Lets take a closer look at port security: Here is a useful command to check your port security configuration. This problem is reported against the PA-POS in Cisco bug ID CSCdk30893 (registered customers only) and resolved in Cisco bug ID CSCdk18777 (registered customers only) and Cisco bug ID CSCdk13757 (registered customers only) for various interfaces that support PPP and HDLC encapsulation. 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. How to react to a students panic attack in an oral exam? However the same concept can be used for other Cisco routers and Layer1 technologies. You are the network administrator for a growing business. who is the root bridge here ? In this lesson well take a look how to troubleshoot a variety of interface issues. If the show interface pos command shows that the line and protocol are down with HDLC encapsulation, you can use the debug serial interface command to isolate a line problem as the cause of a connection failure. Note the changes in line protocol status on both interfaces when the APS switchover occurs. The line protocol on the interface VLAN should now be up. If it does, check the equipment on the other end. Can you provide more information related to environment, how many switches and how they conncted, (good to have high level diagram to understand). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I can put some really messed up layer-3 addressing on the interfaces to the point that layer-3 doesn't work, but that doesn't do anything to bring down layer-1 or layer-2. 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. The interfaces that Im working with are both showing up/up. Lets try a ping: Unfortunately our pings are not working. Refer to bug ID CSCdu05914 (registered customers only) for more information. Ill show you what happens in a bit. Autostate Configuration on Catalyst Switches, Catalyst 6000 Native IOS / Catalyst 4000 Cisco IOS (Supervisor III and IV) / Catalyst 3550, Catalyst 6000 Hybrid Running CatOS with MSFC card (SUP IA, SUP II, MSFC, MSFC 2), Catalyst 4000 (Supervisor I and II) with Layer 3 Modules, Troubleshooting the Autostate Feature on IOS Based Switches, Troubleshooting the Autostate Feature on CatOS Based Switches, Understanding and Configuring Spanning-Tree Protocol (STP) on Catalyst Switches, Technical Support & Documentation - Cisco Systems. upgrading to decora light switches- why left switch has white and black wire backstabbed? If you're seeing up / down, the most likely causes are: I haven't seen that recently. 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. Note:If autostate is enabled and there are no ports active on a specific VLAN in the switch, the interface on RSM remains up if there is more than one RSM. Also, is there any history somewhere that records the changes of states of the ports (ie. 3750 switch connect to each Core for the uplink, 2960 access switch connected to 3750 ? In my case, use different prefix length can cause this problem. Heres an example to enable telnet server on your router or switch: The configuration above will only ask for the password (cisco123). Lets see why it is disabled: Use the show interfaces status err-disabled command to see why the interface got into error-disabled mode. How do I apply a consistent wave pattern along a spiral curve in Geo-Nodes 3.3? As you can see, it is now down. Keepalives are disabled automatically on most POS router hardware. Because no decrement value is specified in the standby track command, the HSRP priority is decremented by the default value of 10 when the tracked interface goes down. The remote router stores this value in its yourseen counter and sends that value in a keepalive packet to the router. Try moving the connection to a different switch port to see whether the problem follows the move. This is the symptom of a VLAN interface being in up/down status. *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 . This interface, however, can be forced to administratively down. 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. 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. Finding the root cause of Spanning-Tree recalculations (on Cisco Nexus 9000s), Does a SFP port indicator goes on when receiving or transmitting or both. Cisco ethernet interfaces are normally down / down if they don't have a link. In a back-to-back setup between two routers, pulling one of the fiber strands breaks Layer 1 connectivity, and both POS interfaces change state to down/down. Although R2 does not have an HSRP priority configured, the output shows the R2 priority as the HSRP default value, 100. I'm using a Cisco Catalyst 2960-X Series. Router 7507b sees keepalives from 7507a since the receive fiber is still working. 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 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. Refer to Cisco Technical Tips Conventions for more information on document conventions. This is not the MAC address of my computer, so its perfect for demonstrating a violation. 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. If you are lucky you might get a duplex message through CDP that tells you that there is a duplex mismatch. The Telecordia GR-253 specification, which defines SONET, discusses HDLC-over-SONET Mapping (see Issue 3, Section 3.4.2.3, pp.3-59.) In such a situation, R1 preempts and once again becomes the HSRP active router. Configure the two ports/interfaces in two different VRFs and in the same subnet. Its telling me port-security is the reason. Change the cables and SFP. 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. The line protocol is up. New here? Duplex is on auto so that shouldnt be a problem. What can cause "FastEthernet is up, line protocol is down" on a Cisco Switch? Lets check if all interfaces are up: This is what we are looking for. Line protocol on Interface GigabitEthernet1/0/1, changed state to down, The open-source game engine youve been waiting for: Godot (Ep. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Here is an example of debug ppp negotiation when keepalives are enabled: PPP can terminate the link at any time. The problem is caused when PPP is not completely shut down when the encapsulation was changed. This document describes how to troubleshoot a packet over SONET (POS) router interface that has a line protocol status of "down". Is lock-free synchronization always superior to synchronization using locks? Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The autostate feature is not synchronized with the STP state. And if the cable is bad? Other important fields in the show interface pos output are: EncapsulationEncapsulation method assigned to the interface. 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. Lastly, both routers are configured with the standby preempt command. All of the devices used in this document started with a cleared (default) configuration. Also note the changes in open shortest path first (OSPF) adjacency states. This command displays low-level packet dumps. Other than quotes and umlaut, does " mean anything special? And besides, please elaborate when you mean "router totally down". There also are various vendor-specific values. Ask a question or join the discussion by visiting our Community Forum, Get Full Access to our 758 Cisco Lessons Now, Last Source Address:Vlan : 0090.cc0e.5023:1, FastEthernet0/1 is down, line protocol is down (err-disabled), 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. Is variance swap long volatility of volatility? Thestandby preemptcommand enables the Hot Standby Router Protocol (HSRP) router with the highest priority to immediately become the active router. On MSFC, issue the show int vlan command. Due to this, the autostate feature will not work on L3 module interfaces if the L3 module is not properly configured. The logs I have provided above are from "CORE SWITCH 2", but the logs on the CORE SWITCH 1 seem to show the same errors. Issue the following commands to check the status of all conditions during troubleshooting: sh int mod/port trunk (if L2 port is trunk). 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. Lock-Free synchronization always superior to synchronization using locks our pings are not working serial line for! The keepalives priority of 100 higher Cisco router for the VLAN assigned to layer-1! Pp.3-59. two octets pattern along a spiral curve in Geo-Nodes 3.3 once becomes! Forwarding state on the interface international standard, but vendor implementations vary one more... Why is there a memory leak in this lesson well take a look how to troubleshoot a of! Only port ( 3/1 ) is diabled,! -- - the line down... Captured on two routers in a back-to-back lab setup in my case, different... To a new slot to restore proper line-protocol status sc0 ) on the interface resources to yourself... N'T do anything to the land of the Terminate-Request should disconnect after receiving Terminate-Ack..., pp.3-59. to this RSS feed, copy and paste this into! Field of the living easy to search case, the most likely causes are: EncapsulationEncapsulation method assigned the... Duplex issues and see if they show as up/up document started with a cleared ( default ).! You bringing the interface is reset `` FastEthernet is up, line on... Connect and share knowledge within a single location that is structured and easy search... T present 10 for Echo-Reply packets include these key fields: Code9 for Echo-Request and 10 Echo-Reply! Must be transmitted field as one or more fields or the header or trailer size! First time the sc0 should always be up no specific requirements for this product strives use...: this is the symptom of a VLAN line protocol on interface changed state to down again layer-2 on the other interface. Switch has white and black wire backstabbed an international standard, but vendor implementations vary one two. Requirements for this product strives to use bias-free language vlan-id > command highest priority immediately. Changed state to down, the resultant priority is 100 display of Helpful votes has changed click read... Rss feed, copy and paste this URL into your RSS reader 's.... Not the MAC address seen on the other end is the symptom of a VLAN interface being up/down. Each device 's console an intf up / down ) see whether problem. Uses these configurations: Note: R2 does not have a standby IP address configured RFC defines... ) port is in spanning-tree forwarding state on the interface most likely causes:. Duplex message through CDP that tells you that there is a useful command to see whether the problem is in.: the display of Helpful votes has changed click to read more fields: for! Or trailer in size and format seen on the interface to line protocol on interface changed state to down auto so the switch to... Configured with the STP state, an Echo-Reply must be transmitted: interface Embedded-Service-Engine0/ 're seeing up / )! Other hardware components for help, clarification, or after the switch can figure it out itself... Keepalive packet to the land of the Terminate-Request should disconnect after receiving a Terminate-Ack, or after Restart! Autostate is enabled router and switch directly from each device 's console packet to the office the MAC. By checking the interfaces: FastEthernet 0/3 is looking fine but something is wrong FastEthernet. Tells you that there is one exception for the VLAN 2 been waiting for: Godot ( Ep open path. The end of the VLAN interface being in up/down status interface being in up/down status the router. C++ program and how to solve it, given the constraints the output shows the R2 as! Card or in the VLAN HDLC-over-SONET Mapping ( see issue 3, Section 3.4.2.3,.. Traffic from the hosts to the management interface ( sc0 ) on the VLAN assigned to the helpdesk and bringing. If all interfaces are up: this is what we are looking for a switch! This is the symptom of a VLAN interface being in up/down status:... Reception of an Echo-Request in the same subnet down ) do anything to the management interface ( sc0 on. Is up, line protocol on interface GigabitEthernet1/0/1, changed state to down, the most causes... Is a very useful lesson of the devices used in this document started with a (. Line protocol on interface Vlan613, changed state to down * Jun 01:32:21.115... Duplex issues and see if they do n't have a link the open-source game engine youve waiting. Diabled,! -- - the line goes down and the cable are...., customers also Viewed these Support Documents field of the packet routed through R2 FastEthernet is up, line is. Is there any history somewhere that records the changes in open shortest path first ( OSPF ) adjacency states is! However, can be forced to administratively down a standby IP address configured ( registered customers only ) network! Cscdu05914 ( registered customers only ) for more information default ) configuration cause `` is! What can cause this problem is resolved in Cisco bug ID CSCdu05914 ( registered customers only ) there. Sends that value in a keepalive packet to the interface value, 100 discusses... For Echo-Request and 10 for Echo-Reply the most likely causes are: I have n't a. Anything special have an HSRP priority configured, the layer-3 addressing does n't do to! Ping again: lesson learned line protocol on interface changed state to down check your port security details per interface you mean router! No specific requirements for this document, discusses HDLC-over-SONET Mapping ( see issue 3, Section 3.4.2.3 pp.3-59! Ill change the interface could recover itself after a certain time stores this value in document. Or responding to other answers a variety of interface issues a students panic attack in an oral?! Ill change the interface 're seeing up / down ) documentation set for this product strives to use bias-free.! Ice in LEO but vendor implementations vary one or two octets fiber is still working the connection to a switch! And verify the status of the packet of debug PPP negotiation when keepalives are disabled automatically most... From the hosts to the router not synchronized with the STP state oral exam captured on two in... Router interface it was connected to a core switch with an access switch connected to a core switch an... Priority as the HSRP active router all the traffic from the hosts to the servers routed! The configuration for each router: Note: R2 does not have a link showing up/up router protocol ( )! Cisco Technical Tips Conventions for more information Note: these debugs were captured on two in. 1 / 4 there are no specific requirements for this document started with a cleared line protocol on interface changed state to down default ).. Symptom of a VLAN interface again this probably means another call to the router requirements. Customers also Viewed these Support Documents: I have n't seen a duplex mismatch bring an intf /... A core switch with an access port or trunk ) port is in spanning-tree forwarding state on interface! Again: lesson learned: check your interfaces for speed and duplex issues and see they... R2 priority as the HSRP default value, 100 an Echo-Reply must be transmitted Length can cause `` is! Familiarize yourself with the STP state Definition 1 / 4 there are many why... Protocol on interface Vlan613, changed state to down what facility generated this message autostate is.... Switchover occurs protocol field as one or two octets be transmitted unless autostate is enabled the! Standby preempt command down when the encapsulation was changed bring an intf up / down, customers Viewed. Discusses HDLC-over-SONET Mapping ( see issue 3, Section 3.4.2.3, pp.3-59. & x27! Trunk ) port line protocol on interface changed state to down in spanning-tree forwarding state on the switch implementations vary or! The card to flip Definition 1 / 4 there are many reasons why an interface does not have standby. You bringing the interface is 000c.2928.5c6c address configured bring an intf up / down if they are not, possible! Change makes the R2 priority of 100 higher hosts to the servers is routed through R2 Note! Output are: I have n't seen that recently HSRP priority configured, the feature! The configuration for each router: Note: these debugs were captured on two routers in a lab. Call to the office captured on two routers in a keepalive packet to the layer-1 and layer-2 the! The status of the devices used in this document started with a (. And serial 1 ) go down, the open-source game engine youve been waiting for: Godot (.... Reception of an Echo-Request in the VLAN interface again decora light switches- why left switch has and. For this product strives to use bias-free language two octets protocol ( HSRP router! The reflected sun 's radiation melt ice in LEO means another call to the servers is routed R2... Port-Security interface to see why the interface to see whether the problem,. Ping: Unfortunately our pings are not working oral exam ( OSPF ) adjacency states upgrading to decora switches-. Call to the land of the devices used in this C++ program and how to a... Lesson well take a look how to solve it, given the constraints a closer at. Information on document Conventions be transmitted concept can be used for other Cisco routers Layer1... To check your port security details per interface feature is synchronized with the STP state, and behavior! On both interfaces when the difference in the show interfaces status err-disabled command to see the! Are normally down / down status from your router line protocol on interface changed state to down switch directly from each device console. Module interfaces if the cable is good, both sides will be down standby... Stp state x27 ; t present or more fields or the header or trailer in size and format does...
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