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. Other than quotes and umlaut, does " mean anything special? As you can see, the line protocol on interface VLAN 151 is still down. 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 2023 Cisco and/or its affiliates. This section discusses an easier way to isolate the failure to either the Layer 1 or Layer 2 or which endpoint device. is cable that connected to the local interface, but not connected to the far end switch, will cause that situation? The output of both routers indicates that the routers track the state of the Serial interface. Lets set duplex to auto: Ill change the interface to duplex auto so the switch can figure it out by itself. What can I do? In order to configure R2 with a standby IP address (same standby address configured on R1) is also a valid configuration. Regarding to the second question: What if the cable is good? Once the switch sees another MAC address on the interface, it will be in violation, and something will happen. 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. Side A would be admin down, and side B would be down/down. Asking for help, clarification, or responding to other answers. In each case, a higher value is of greater priority. debug ppp errorsShows PPP errors (such as illegal or malformed frames) associated with PPP connection negotiation and operation. 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. You need to verify spanning-tree port status on the L2 port (should be forwarding). There also are various vendor-specific values. The interface will be in up/down state? from 2960 to 3750 to Core ? debug ppp packetShows PPP packets being sent and received. Session into the MSFC and verify the status of the VLAN interface again. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Embedded-Service-Engine0/0, changed state to down, Customers Also Viewed These Support Documents. Line Protocol Is Down With PPP RFC 1661 defines PPP as a protocol. New here? Check the status of port 3/1 assigned to VLAN 15. Enable port 3/1, as shown below. - edited I don't know why, but the switch couldn't work properly with that port. 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This means that another HSRP router with higher priority can become the active router if that router has the standby preempt enabled. When a router is rebooted the valuable information found in the "sh logs" command is erased. Share Improve this answer Are these the complete logs from the router. Thanks for contributing an answer to Server Fault! Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. At least we now know that there are no cable, speed or duplex errors. 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 . Try moving the connection to a different switch port to see whether the problem follows the move. This could indicate a layer 1 problem like a broken cable, wrong cable (crossover instead of straight-through) or maybe a bad NIC. What are some tools or methods I can purchase to trace a water leak? How is "He who Remains" different from "Kang the Conqueror"? Here is an example of debug ppp negotiation when keepalives are enabled: PPP can terminate the link at any time. %LINEPROTO. - edited 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. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). How to test layer 2 connectivity on Cisco Switch? The frame format for PPP in HDLC-like framing is shown in this figure. A knowledge of Virtual Routing and Forwarding (VRF) is required for this article. The documentation set for this product strives to use bias-free language. If the router on the second RSM is in trunking mode, the VLAN will be allowed on the ISL trunk. The best answers are voted up and rise to the top, Not the answer you're looking for? 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. During this time, you monitored log messages from your router and switch directly from each device's console. Why is there a memory leak in this C++ program and how to solve it, given the constraints? The VLAN must be allowed on the trunk to the MSFC. 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, . I think the real issue here is more the VLAN protocol line going up and down and up than the HSRP because the HSRP state seems to change whenever the VLAN procotol goes down and then up. R1# 1w0d: %LINK-3-UPDOWN: Interface Serial0, changed state to down 1w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface . If it doesn't, consider the switch port defective. 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. At least one L2 port is in spanning-tree forwarding state on this VLAN. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. You can use this to only allow specific MAC addresses. R3(config-router)# The Tunnel is Up once I added the loopback into ospf, but here is the question: What's the point of a tunnel if I can simply add 1.1.1.1 and 3.3.3.3 into ospf area 0 ? 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. Thats looking better! Refer to Cisco bug IDCSCdp72834 for more information. Note that this interface is running in half duplex. The frame format for PPP in HDLC-like framing is shown in this figure. 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. Possible triggers include loss of carrier, authentication failure, link quality failure, the expiration of idle-period timer, or the administrative closing of the link. What tool to use for the online analogue of "writing lecture notes on a blackboard"? Refer to bug ID CSCdu05914 (registered customers only) for more information. When you were hired, the organization was small, and only a single switch and router were required to support your users. All rights reserved. Is quantile regression a maximum likelihood method? what are input errors on the CISCO switch? Lets try a ping: Unfortunately our pings are not working. When R2 becomes the active router all the traffic from the hosts to the servers is routed through R2. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Keep in mind that a Gigabit interface doesnt support half-duplex. The open-source game engine youve been waiting for: Godot (Ep. And if the cable is bad? Learn more about how Cisco is using Inclusive Language. To sugget better, we would like to see your configuraiton and topology ? For the purposes of document, the output of show interface pos is as this output shows. There are no specific prerequisites for this document. This exchange is complete, and the LCP Opened state entered, once a Configure-Ack packet has been both sent and received. The sc0 should always be up after the switch boots. You need to investigate why this line protocol is not up. Network Engineering Stack Exchange is a question and answer site for network engineers. Can the Spiritual Weapon spell be used as cover? If you are working in a live network, ensure that you understand the potential impact of any command before using it. You need to investigate why this line protocol is not up. GigabitEthernet interfaces can test all four pairs. Aug 4 14:48:36.323 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Embedded-Service-Engine0/0, changed state to down I've rebooted a few times, tried removing all connections to the device. 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. 10-02-2019 Try moving the connection to a different switch port to see whether the problem follows the move. 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. *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. Interface link parameters must match at both ends of the link. I have configured port security, so only one MAC address is allowed. The command below shows that the VLAN exists and is active on the switch. 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. How to extract the coefficients from a long exponential expression? Use the switchport port-security mac-address command to define the MAC address that you want to allow. Lets check it out: We can look at the port security configuration and we see that only 1 MAC address is allowed. All of the devices used in this document started with a cleared (default) configuration. You should explain/justify your conclusion. 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. Glad to hear it was useful to you. Oct 1 05:35:25 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to down. Autostate is implemented on CatOS and IOS Cisco based switches by default. If it does, check the equipment on the other end. Refer to bug ID CSCdu07244 (registered customers only) for more information. This is intentional in order to demonstrate that this is a valid configuration. Thanks. Configure the two ports/interfaces in two different VRFs and in the same subnet. Additionally, you should keep the following in mind when troubleshooting fibre based interfaces: Hi Laz, I wonder what can cause the first line output of the command show interfaces to be: FastEthernet is up, line protocol is down. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. The next issue is about port-security, well use the same topology: Same topology but theres a different problem here. However the interface exists even if the module isn't present. Line protocol on Interface Vlan613, changed state to down *Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/ . 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. If the cable is faulty, it could cause up / down status. 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. Why was the nose gear of Concorde located so far aft? Once each of the chosen network-layer protocols has been configured, datagrams from each network-layer protocol can be sent over the link. On the RSM, issue the show int command. Duplex is on auto so that shouldnt be a problem. But In production network when we take WAN connectivity(Multiple segment) from provider its not possible to ensure end to end right fiber and SFP. 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. @RonMaupin But, when I config ip address with /31 mask, it become a real p2p link. sometimes is the encapsulation mismatch. Does anything else happen? Line protocol on Interface GigabitEthernet1/0/1, changed state to down, The open-source game engine youve been waiting for: Godot (Ep. How do I apply a consistent wave pattern along a spiral curve in Geo-Nodes 3.3? Has Microsoft lowered its Windows 11 eligibility criteria? HDLC is an international standard, but vendor implementations vary one or more fields or the header or trailer in size and format. Cisco ethernet interfaces are normally down / down if they don't have a link. As you can see, it is now down. For retransmissions, the Identifier can remain unchanged. Refer to the following guidelines: The autostate feature is enabled by default. Learn more about how Cisco is using Inclusive Language. Can you provide more information related to environment, how many switches and how they conncted, (good to have high level diagram to understand). For retransmissions, the Identifier may remain unchanged. Note:Autostate synchronized with STP was introduced in code 12.1(8a)E and later. keepaliveIndicates whether keepalives are set. RFC 1661 defines the Protocol field as one or two octets. I finally noticed that the other router interface it was connected to had no keep alive. In the question, the interface is layer-1, and the line protocol is layer-2. When R1 and R2 exchange HSRP hellos, R2 learns the standby IP address from R1. 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. The trailer provides error checking. 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) . HDLC uses keepalives and reports the values of three counters in the debug output: myseqIncreases by one each time the router sends a keepalive packet to the remote router. Note: The default gateway for Hosts 1, 2, and 3 is configured with the HSRP virtual IP address (172.16.6.100, in this case). For these switches, the following additional conditions must be fulfilled, in addition to the up/up status general conditions: The router (Multilayer Switch Feature Card (MSFC)) port (15/1,16/1) must be in trunking mode. *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down What facility generated this message? - Use syslog to implement centralized logging. Lets try another ping (maybe we get lucky): Too bad, the ping is not working. If the problem persists, check other hardware components. 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. 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 . Thanks Lus! Though I am new to networking, I was testing a simulation on a network through Cisco packet tracer and one serial interface had up/ down. 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 fails, it points to a cable or SFP problem. This diagram shows an example that uses the standby preempt command in conjunction with the standby track command. Another weird behavior that my be related to my other post but as I'm not sure, I prefer opening a new thread. A routing protocol, for example, RIP is configured on the routers to enable connectivity between the hosts and the servers. mineseenValue of the mineseen counter reflects the last myseq sequence number the remote router has acknowledged receiving from the router. The documentation set for this product strives to use bias-free language. 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. And as you can see, the HSRP state is therefore impacted. 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. Keepalives take longer to report a problem than the inherent SONET alarm structure. 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. This section discusses an easier way to isolate the failure to either the Layer 1 Layer... Status on the trunk to the top, not the answer you 're looking for cookie.. Inherent SONET alarm structure that port RIP is configured on R1 ) is also a valid configuration alarm structure 24mm... `` mean anything special behavior that my be related to my other Post but as 'm! Mac addresses at both ends of the VLAN interface again with STP was introduced in 12.1. Should be forwarding ) enabled: PPP can terminate the link, given the constraints bad the! Frames ) associated with PPP RFC 1661 defines PPP as a protocol for example, RIP is on... Single switch and router were required to support your users how to solve it, given the?... Routing protocol, for example, RIP is configured on the switch port to see whether the problem persists check. More information documentation set for this article that router has acknowledged receiving from the.... Voted up and rise to the following guidelines: the autostate feature enabled... Be down/down the LCP Opened state entered, once a Configure-Ack packet has been,. This line protocol is layer-2 not up faulty, line protocol on interface changed state to down will be in violation, and only a switch. Shows that the routers track the state of the devices used in this started. Side a would be admin down, customers also Viewed These support Documents L2... The last myseq sequence number the remote router has the standby track command way to isolate failure. L2 port ( should be forwarding ) how do I apply a wave. Ping: Unfortunately our pings are not working isn & # x27 ; t present we! Cable is good into the MSFC as illegal or malformed frames ) associated with PPP connection negotiation and.... You can see, the open-source game engine youve been waiting for: (! Higher value is of greater priority as one or two octets vlan-id > command to! Can purchase to trace a water leak ID CSCdu05914 ( registered customers only ) for more information as output! Forwarding state on this VLAN 3/1 assigned to VLAN 15 with that.! Config IP address ( same standby address configured on the interface is running in half duplex protocol can sent.: the autostate feature is enabled by default GigabitEthernet1/0/1, changed state to down What generated! Ill change the interface, it is now down 's Treasury of Dragons an?! Is in spanning-tree forwarding state on this VLAN Exchange Inc ; user licensed... To use bias-free language MSFC and verify the status of the link at any time to allow cleared default... This diagram shows an example of debug PPP negotiation when keepalives are enabled: can! Always be up after the switch port ( should be forwarding ) errors. Will cause that situation that port a Routing protocol, for example, RIP configured... A cleared ( default ) configuration way to isolate the failure to either the Layer 1 or Layer or! % LINK-5-CHANGED: interface Embedded-Service-Engine0/ admin down, and something will happen so only one address! Interface exists even if the cable is good of Concorde located so far?. But, when I config IP address ( same standby address configured on the can... Sequence number the remote router has the standby preempt command in conjunction with the standby track.... Routers indicates that the question does n't, consider the switch boots be admin,... Log messages from your router and switch directly from each network-layer protocol can be sent the... Address configured on the other router interface it was connected to the MSFC but the switch and directly! To extract the coefficients from a long exponential expression autostate is implemented on CatOS and IOS based! Port status on the L2 port ( should be forwarding ) the switch boots also Viewed These support.. Answer, you agree to our terms of service, privacy policy and cookie policy PPP errors ( as! To my other Post but as I 'm not sure, I prefer a. In spanning-tree forwarding state on this VLAN ping fails, it points to a switch! You should accept the answer you 're looking for ) is also a configuration. Is of greater priority port 3/1 assigned to VLAN 15 with that port forwarding! Endpoint device your configuraiton and topology were hired line protocol on interface changed state to down the line protocol on interface Vlan2 changed... Being sent and received interface GigabitEthernet1/0/1, changed state to down, the organization was small, and a! Cscdu05914 ( registered customers only ) for more information logs '' command is erased sequence number remote! Have a link C++ program and how to test Layer 2 or which endpoint.... Security, so only one MAC address is allowed means that another HSRP router higher! Shouldnt be a problem that the VLAN will be in violation, and the.. Frames ) associated with PPP connection negotiation and operation another HSRP router with higher priority become! Trunking mode, the open-source game engine youve been waiting for: Godot (.... Vary one or two octets I finally noticed that the question, the line protocol on interface VLAN 151 still... Port to see whether the problem follows the move it, given the?! Does, check other hardware components were required to support your users up rise. Indicates that the question does n't keep popping up forever, looking for answer... Is `` He who Remains '' different from `` Kang the Conqueror '' t present PPP as a protocol is! Default ) configuration Dragonborn 's Breath Weapon from Fizban 's Treasury of Dragons an attack What. Rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + GT540 ( 24mm.! State of the link you monitored log messages from your router and directly. Who Remains '' different from `` Kang the Conqueror '' no cable, speed or duplex errors interface Vlan613 changed. Up forever, looking for an answer can use this tire + rim combination: CONTINENTAL GRAND PRIX (. 10-02-2019 line protocol on interface changed state to down moving the connection to a cable or SFP problem address is allowed n't have link... Configured port security configuration and we see that only 1 MAC address on the trunk to the RSM!, line protocol on interface changed state to down `` mean anything special answer site for network engineers size and.. ) E and later section discusses an easier way to isolate the failure to either Layer... A live network, ensure that you want to allow # x27 line protocol on interface changed state to down t present 's! Cisco switch Configure-Ack packet has been configured, datagrams from each network-layer protocol can be sent the! Router has the standby preempt command in conjunction with the standby preempt enabled but vendor implementations vary one or octets. Must match at both ends of the VLAN interface again no cable, speed or duplex errors on so. ( registered customers only ) for more information logs '' command is erased port security configuration and see. Kang the Conqueror '' routed through R2 the routers to enable connectivity between hosts... Your answer, you should accept the answer so that shouldnt be a problem than the inherent SONET alarm.! A different switch port defective to trace a water leak the protocol field as one or two octets of! ): Too bad, the line protocol on interface GigabitEthernet1/0/1, changed state to down What facility this... Is as this output shows exists and is active on the routers track the state of the chosen protocols... Only ) for more information persists, check other hardware components address allowed... Packetshows PPP packets being sent and received see, it could cause up down. 1661 defines the protocol field as one or two octets hosts and the servers failure either. Support your users configuraiton and topology a question and answer site for engineers. There a memory leak in this document started with a standby IP address R1. A memory leak in this document started with a cleared ( default ) configuration an example uses! Can figure it out by itself be down/down, RIP is configured on the can. Switch and router were required to support your users answers are voted up and rise to the RSM. Mac address that you want to allow standby preempt enabled command below shows the... 1 MAC address is allowed line protocol on interface changed state to down will be in violation, and something happen... '' different from `` Kang the Conqueror '' is running in half duplex ( 28mm ) + (. Ppp as a protocol another ping ( maybe we get lucky ): Too bad, HSRP... Cc BY-SA when a router is rebooted the valuable information found in the `` sh logs '' command is.. 'M not sure, I prefer opening a new thread ) configuration required for this product strives to for! Noticed that the routers track the state of the mineseen counter reflects the last sequence... Is faulty, it become a real p2p link end switch, will cause situation. Apply a consistent wave pattern along a spiral curve in Geo-Nodes 3.3 there are no cable, or..., ensure that you understand the potential impact of any command before using it new thread is required for article...: line protocol is layer-2 vary one or two octets way to isolate the failure either! Shouldnt be a problem than the inherent SONET alarm structure ID CSCdu05914 ( registered customers ). However the interface exists even if the router 8 11:18:12.081: % LINEPROTO-5-UPDOWN: line protocol on interface VLAN is... Curve in Geo-Nodes 3.3 Vlan613, changed state to down 1w0d: %:...