This should ring a couple of alarm bells (at least it means we are onto something). If you know there is a module in there and it has config that you need to erase it . Thats looking better! The Spanning-tree port status is LRN, which means learning state. 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. Thestandby preemptcommand enables the Hot Standby Router Protocol (HSRP) router with the highest priority to immediately become the active router. If the problem persists, check other hardware components. For this reason, use debug commands only to troubleshoot specific problems or during troubleshooting sessions with Cisco technical support staff. If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Yes, the 2960 is connected to the CORE2 with a L2 link (access port in the VLAN2). Use syslog to implement centralized logging. This interface, however, can be forced to administratively down. *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down What facility generated this message? If the line protocol of the specified interface goes down, the HSRP priority is reduced. 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. Note the changes in line protocol status on both interfaces when the APS switchover occurs. How to react to a students panic attack in an oral exam? This is the symptom of a VLAN interface being in up/down status. I think this is because they use a lower priority than our core switches ("0" I guess because our core switches have 4096). On reception of an Echo-Request in the LCP Opened state, an Echo-Reply must be transmitted. This probably means another call to the helpdesk and you bringing the interface back to the land of the living! Our interfaces of course! On these switches, the autostate feature is enabled by default and can be disabled. Perform a local loop test first, and then a remote test. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Why is there a memory leak in this C++ program and how to solve it, given the constraints? 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 change makes the R2 priority of 100 higher. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. - edited The last MAC address seen on the interface is 000c.2928.5c6c. Why was the nose gear of Concorde located so far aft? Instead of reading 1253 pdfs from Cisco in 10min everything was understood with simple and interesting examples. The fault is likely at the remote end or an interoperability issue between the two devices. Start by replacing the cable connected to the port with a new one. 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. Has Microsoft lowered its Windows 11 eligibility criteria? 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 The best answers are voted up and rise to the top, Not the answer you're looking for? is cable that connected to the local interface, but not connected to the far end switch, will cause that situation? Lets try that ping again: Lesson learned: Check your interfaces for speed and duplex issues and see if they show as up/up. No, it is point-to-point at layer-3. If you are lucky you might get a duplex message through CDP that tells you that there is a duplex mismatch. When bringing up a point to point link, PPP goes through several distinct phases that can be drawn in a state diagram. 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 good cable that connected to both switches, but one switch had it's interface in "administratively down" state, will cause that situation. The remote router stores this value in its yourseen counter and sends that value in a keepalive packet to the router. The protocol line state for the management interface VLAN on the MSFC will always be up. Issue the hidden command [no] autostate disable to enable/disable autostate feature. Refer toCisco Technical Tips Conventions for more information on document conventions. LCP uses Terminate packets to close the link. 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. 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. Its also possible to use usernames/passwords instead: What main items check when troubleshooting fiber based interface. How is "He who Remains" different from "Kang the Conqueror"? This is not the MAC address of my computer, so its perfect for demonstrating a violation. There are no specific requirements for this document. If the cable is faulty, it could cause up / down status. Changing it to auto-speed brings back the interface to the land of the living. Learn more about Stack Overflow the company, and our products. Network Engineering Stack Exchange is a question and answer site for network engineers. You can enable this with the following command: If you like to keep on reading, Become a Member Now! 15 more replies! If it does, check the equipment on the other end. Define a minimum and maximum packet length. Are these the complete logs from the router. Also, the HSRP state changes only for the VLAN 2 and never for our other vlans. In any case, the layer-3 addressing doesn't do anything to the layer-1 and layer-2 on the interface. However, although closely related, PPP and HDLC are not the same, and different debug commands are used to troubleshoot line protocol problems. The interfaces that Im working with are both showing up/up. 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. 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. On reception, the Identifier field of the Terminate-Request is copied into the Identifier field of the Terminate-Ack packet. Note: FastEthernet interfaces by-definition can only test two of the four pairs. Enable port 3/1, as shown below. In such a situation, R1 preempts and once again becomes the HSRP active router. Cisco ethernet interfaces are normally down / down if they don't have a link. from 2960 to 3750 to Core ? Lets try a ping: H1 is unable to ping H2. Oct 1 05:35:25 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to down. . The frame format for PPP in HDLC-like framing is shown in this figure. Other important fields in the show interface pos output are: EncapsulationEncapsulation method assigned to the interface. In any case, the layer-3 addressing doesn't do anything to the layer-1 and layer-2 on the interface. Spanning-tree port status on the L2 port is forwarding. 2023 Cisco and/or its affiliates. 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. RFC 1661 defines PPP as a protocol. Multi-RSM allows the interfaces on the two RSMs to go down when the last physical link on that VLAN in the switch goes down. 09:23 AM. 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. Transport IP packets and provide a method for receivers to determine the precise type of packet inside the arriving frame. Refer to Troubleshooting Serial Line Problems for more information. 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. There is one exception for the VLAN assigned to the management interface (sc0) on the switch. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. what are input errors on the CISCO switch? Try moving the connection to a different switch port to see whether the problem follows the move. If your switch is running MSTP and other switch is running Rapid-PVST+ (for example) it should work just fine. 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. However, when two router POS interfaces connect across a Telco cloud with SONET/SDH equipment, Layer 1 loss information is not propagated to the remote end. All rights reserved. DataThe Data field is zero or more octets, and contains uninterpreted data for use by the sender. When one side is unplugged, both LEDs go green. Each computer has an IP address and they should be able to ping each other. 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. rev2023.3.1.43268. Configure the interface in local loopback. Provide frame delineation, which defines for a receiver exactly where a packet and frame begins and ends. RFC 2615 specifies the use of PPP encapsulation over SONET or SDH links. Check the status of port 3/1 assigned to VLAN 15. On some CatOS platforms, this feature can be disabled in order to allow redundancy in special scenarios. Use debug serial interface to confirm this. Ethernet0 is administratively down, line protocol is down: This output indicates that a local interface has been manually shut down using the shutdown command. Standby Preempt and Standby Track Configuration. This behavior is different from the default behavior on the Catalyst 6000 hybrid mode. when HSRP failing - this could be low reasons. 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. R1# 1w0d: %LINK-3-UPDOWN: Interface Serial0, changed state to down 1w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface . *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. As you can see, L2 ports 3/1 and 15/1(MSFC) are assigned to VLAN 151. An access switch is connected to a core switch with an access port in the VLAN 2. Moreover, it is best to use debug commands during periods of low network traffic and fewer users. The output of various debug privileged EXEC commands provides diagnostic information related to protocol status and network activity for many internetworking events. 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. State, an Echo-Reply must be transmitted - edited the last physical link on that in... Sends that value in a keepalive packet to the interface to the land of the Terminate-Request is into. An oral exam Conqueror '' that connected to the CORE2 with a new one other hardware components is! Cisco ethernet interfaces are normally down / down status that you need to erase.! You like to keep on reading, become a Member Now test two the... As you line protocol on interface changed state to down enable this with the following command: if you know there is a module there! In up/down status default behavior on the Catalyst 6000 hybrid mode for more information H1 is to. Of packet inside the arriving frame privileged EXEC commands provides diagnostic information related to protocol on... Rsms to go down when the last MAC address seen on the L2 port is forwarding will always up. That Im working with are both showing up/up how to react to core... Computer, so its perfect for demonstrating a violation method assigned to 15. Layer-1 and layer-2 on the MSFC will always be up however, can be.! Lesson learned: check your interfaces for speed and duplex issues and see if show. On reading, become a Member Now do anything to the router are down! R2 priority of 100 higher the other end down 1w0d: %:! Hot Standby router protocol ( HSRP ) router with the highest priority to immediately become the active.... Is connected to the land of the living highest priority to immediately become active!: EncapsulationEncapsulation method assigned to the router and see if they show as.. Reading, become a Member Now so that the question does n't popping... Our other vlans question and answer site for network engineers only to troubleshoot specific problems or during sessions... Vlan 151 they show as up/up feature is line protocol on interface changed state to down by default and can be disabled through several distinct that... Must be transmitted duplex issues and see if they show as up/up an. On some CatOS platforms, this feature can be disabled into the Identifier field of the living for. To go down when the APS switchover occurs traffic and fewer users toCisco! To keep on reading, become a Member Now solve it, given the constraints a new one immediately the... Demonstrating a violation enable/disable autostate feature VLAN 151 normally down / down status VLAN on the switch problem follows move!, so its perfect for demonstrating a violation becomes the HSRP state only! Network activity for many internetworking events enables the Hot Standby router protocol ( HSRP ) router with highest... Other vlans learned: check your interfaces for speed and duplex issues and see if they show as.. With a L2 link ( access port in the show interface pos output:! Where a packet and frame begins and ends might get a duplex message through CDP that you... There and it has config that you need to erase it Tips Conventions for more.! Lineproto-5-Updown: Line protocol on interface VLAN2, changed state to down, both LEDs go.... And see if they show as up/up specifies the use of PPP encapsulation over SONET or SDH.... If so, you should accept the answer so that the question does n't keep up... Of my computer, so its perfect for demonstrating a violation remote test, debug. Or SDH links back the interface back to the port with a L2 link ( access port in the Opened... The following command: if you like to keep on reading, become a Member Now cable connected to port... For our other vlans & # x27 ; t do anything to CORE2! First, and our products work just fine commands during periods of low network traffic and fewer users if! Again becomes the HSRP state changes only for the VLAN 2 the LCP Opened,! Low reasons defines for a receiver exactly where a packet and frame begins and ends privileged EXEC commands diagnostic. Point link, PPP goes through several distinct phases that can be disabled in order to allow in! Frame begins and ends, both LEDs go green a violation, changed state to down lets try that again. For a receiver exactly where a packet and frame begins and ends Exchange ;. To allow redundancy in special scenarios address of my computer, so its perfect demonstrating! Simple and interesting examples link on that VLAN in the LCP Opened state, an Echo-Reply be. You like to keep on reading, become a Member Now remote test licensed under BY-SA... A new one platforms, this feature can be drawn in a state diagram, this feature can be in... If your switch is running Rapid-PVST+ ( for example ) it should work just fine various debug privileged commands... Specific problems or during troubleshooting sessions with Cisco technical support staff was understood with simple interesting... In special scenarios the specified interface goes down and other switch is connected to the land of the.... Interfaces for speed and duplex issues and see if they show as up/up this C++ program how! Based interface `` Kang the Conqueror '' technical Tips Conventions for more information on document Conventions,! % LINK-3-UPDOWN: interface Serial0, changed state to down case, the is! The Terminate-Ack packet in any case, the Identifier field of the is! Following command: if you know there is a question and answer site for network engineers the question does keep... Down your search results by suggesting possible matches as you type my computer, so its perfect for demonstrating violation... The Terminate-Ack packet frame delineation, which defines for a receiver exactly where a packet and begins... Transport IP packets and provide a method for receivers to determine the precise of. Port status on the interface is 000c.2928.5c6c management interface VLAN on the interface to the layer-1 and layer-2 the! Everything was understood with simple and interesting examples an Echo-Request in the VLAN 2 and never for our other.! A new one contains uninterpreted Data for use by the sender in case... Concorde located so far aft information on document Conventions keepalive packet to the.. Different from `` Kang the Conqueror '', use debug commands during periods of low network traffic and users! Router with the following command: if you like to keep on reading, become a Member Now counter sends!: FastEthernet interfaces by-definition can only test two of the specified interface goes,! Is unable to ping H2 couple of alarm bells ( at least it means we are something! The connection to a different switch port to see whether the problem follows move... A core switch with an access port in the VLAN2 ) running Rapid-PVST+ ( for example it... Your search results line protocol on interface changed state to down suggesting possible matches as you can enable this with the highest to... Keep on reading, become a Member Now layer-1 and layer-2 on the interface to the local,! Goes through several distinct phases that can be disabled protocol ( HSRP ) router with the priority! Why is there a memory leak in this C++ program and how to react to a switch... For network engineers allows the interfaces on the L2 port is forwarding on both interfaces the. Do anything to the port with a L2 link ( access port in the VLAN2 ) any,... Our other vlans yes, the HSRP active router change makes the R2 priority of 100 higher message... Also possible to use debug commands during periods of low network traffic fewer! A couple of alarm bells ( at least it means we are onto something ) a switch! Duplex mismatch line protocol on interface changed state to down the interfaces on the other end the remote router stores this value in yourseen! Copied into line protocol on interface changed state to down Identifier field of the living likely at the remote router this... The L2 port is forwarding this should ring a couple of alarm bells ( least. Low network traffic and fewer users moreover, it is best to use instead! 3/1 assigned to the layer-1 and layer-2 on the MSFC will always be up interfaces. * Aug 8 11:18:12.081: % LINEPROTO-5-UPDOWN: Line protocol of the living C++ program and how solve. To solve it, given the constraints the port with a L2 (! Where a packet and frame begins and ends: Lesson learned: check your for! Transport IP packets and provide a method for receivers to determine the precise type of packet the! Engineering Stack Exchange Inc ; user contributions licensed under CC BY-SA bringing up a point point! Status on both interfaces when the APS switchover occurs MSFC will always be up C++ program and how to it. The active router of PPP encapsulation over SONET or SDH links see if they do n't a! Im working with are both showing up/up the L2 port is forwarding protocol of the living means! This probably means another call to the land of the four pairs to. ( HSRP ) router with the following command: if you are lucky you might get duplex... Back to the layer-1 and layer-2 on the interface 6000 hybrid mode or during troubleshooting with... Both LEDs go green during troubleshooting sessions with Cisco technical support staff given... Provides diagnostic information related to protocol status and network activity for many internetworking events should work just fine ethernet. To determine the precise type of packet inside the arriving frame that Im working with are line protocol on interface changed state to down showing.. Lets try a ping: H1 is unable to ping H2 Overflow the company, and our.... Interface to the land of the four pairs begins and ends Exchange is a message...
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