Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix. All rights reserved. Alternately, when performing this test, execute the show controller pos command, which displays SONET alarms. IdentifierOn transmission, the Identifier field must be changed whenever the content of the Data field changes and whenever a valid reply has been received for a previous request. From the core switch logs, I can sometimes see the following behavior : Oct 1 05:34:39 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to up. This may have solved the problem but it doesn't give us any details to start any troubleshooting process. Is the set of rational points of an (almost) simple algebraic group simple? 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. Suspicious referee report, are "suggested citations" from a paper mill? How is "He who Remains" different from "Kang the Conqueror"? The line protocol on the interface VLAN should now be up. When you were hired, the organization was small, and only a single switch and router were required to support your users. Asking for help, clarification, or responding to other answers. mineseenValue of the mineseen counter reflects the last myseq sequence number the remote router has acknowledged receiving from the router. FastEthernet 0/1 is showing down. It might be easier if the interface could recover itself after a certain time. What are some tools or methods I can purchase to trace a water leak? Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Cisco ethernet interfaces are normally down / down if they don't have a link. If they are not, a possible timing problem exists on the interface card or in the network. At least one L2 port is in spanning-tree forwarding state on this VLAN. whick menas that keepalives will not be receiver on the far end. The frame format for PPP in HDLC-like framing is shown in this figure. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Refer toCisco Technical Tips Conventions for more information on document conventions. For retransmissions, the Identifier can remain unchanged. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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 ? The documentation set for this product strives to use bias-free language. Spanning-tree port status on the L2 port is forwarding. 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. 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 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. Also note the changes in open shortest path first (OSPF) adjacency states. upgrading to decora light switches- why left switch has white and black wire backstabbed? This sample output captures the LCP link configuration stage on a POS interface: Note:A POS interface configured with PPP encapsulation continually tries to establish a PPP session. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The VLAN must be allowed on the trunk to the MSFC. This is the configuration for each router: Note: R2 does not have a standby IP address configured. Line protocol on Interface Vlan613, changed state to down *Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/ . 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. Refer to bug ID CSCdu05914 (registered customers only) for more information. Provide frame delineation, which defines for a receiver exactly where a packet and frame begins and ends. This document is not restricted to specific software and hardware versions. It is possible that no device is connected to the interface or that the link has cabling or auto-negotiation issues preventing the link from being up. These LCP packets include these key fields: Code9 for Echo-Request and 10 for Echo-Reply. Shutting the interface after a security violation is a good idea (security-wise), but the problem is that the interface will stay in err-disable state. For more information on document conventions, see the Cisco Technical Tips Conventions. Switch interfaces are layer-2 interfaces, but if you can address it, then you have enabled layer-3 and it is a router interface. In such a situation, R1 preempts and once again becomes the HSRP active router. Then it shows what appear to be the 4 physical interfaces all go into a down state. Moreover, it is best to use debug commands during periods of low network traffic and fewer users. 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. Find answers to your questions by entering keywords or phrases in the Search bar above. Change the cables and SFP. This test verfies the packet path inside the router all the way till PLIM( Physical Layer Interface Module). Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! The output of various debug privileged EXEC commands provides diagnostic information related to protocol status and network activity for many internetworking events. Learn more about how Cisco is using Inclusive Language. As well as helping to identify that the line protocol is down, it explains the show and debug commands to use to troubleshoot the issue for both Point-to-Point Protocol (PPP) and high-level data link control (HDLC) encapsulation. I wonder what can cause the first line output of the command show interfaces to be: FastEthernet is up, line protocol is down. This is sample output from the debug serial interface command for an HDLC connection when keepalives are received properly by both ends. On some CatOS platforms, this feature can be disabled in order to allow redundancy in special scenarios. Switch interfaces are layer-2 interfaces, but if you can address it, then you have enabled layer-3 and it is a router interface. On reception of an Echo-Request in the LCP Opened state, an Echo-Reply must be transmitted. This is sample output from the debug serial interface command for an HDLC connection when the remote interface is shut and the local interface misses more than three keepalives. Refer to Cisco bug IDCSCdp72834 for more information. *Jun 15 01:32:19.759: %SYS-5-CONFIG_I: Configured from memory by console*Jun 15 01:32:20.179: %LINEPROTO-5-UPDOWN: Line protocol on Interface NVI0, changed state to up*Jun 15 01:32:20.723: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan613, changed state to down*Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/0, changed state to administratively down*Jun 15 01:32:22.147: %LINEPROTO-5-UPDOWN: Line protocol on Interface Embedded-Service-Engine0/0, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/0, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/2, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/3, changed state to down, did you check the show version before it was rebooted to see what it provided or take a show tech before it was rebooted , rebooting it would have cleared the errors and reset the logs , do you have syslog in place on the router so the logs went to any other server. 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. 2. this could me while spanning-tree convergence time. Check the status of interface gig 4/10 assigned to VLAN 151. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. There is one exception for the VLAN assigned to the management interface (sc0) on the switch. The autostate feature is not synchronized with the STP state. 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. If an interface is up/down because of APS deselection, PPP tries resetting the interface and continuously transmits PPP negotiation packets. Is quantile regression a maximum likelihood method? - edited Lets check the interface that connects to H2: Interface Fa0/3 that is connected to H2 is also down. Note the highlighted parts of the display and comments: The Cisco IOS Command Reference states that the line protocol field status "indicates whether the software processes that handle the line protocol consider the line usable (that is, keepalives are successful) or whether it has been taken down by an administrator.". RFC 2615 specifies the use of PPP encapsulation over SONET or SDH links. Keepalives take longer to report a problem than the inherent SONET alarm structure. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. You are the network administrator for a growing business. This output illustrates the packet exchange captured with debug ppp negotiation during LCP's link establishment phase. 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. 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. CN router also shows the interface going up/down when disconnected and reconnected Interface link parameters must match at both ends of the link. I have configured port security, so only one MAC address is allowed. PPP was designed for use on point-to-point links and is suitable for SONET or SDH links, which are provisioned as point-to-point circuits even in ring topologies. All of the devices used in this document started with a cleared (default) configuration. Maybe the Rapid-PVST+ wanted to be the root for the CST? Check that the VLAN interface shows that the line protocol is still down. Lets walk through a couple of scenarios. Use a spare port on the same router and connect the port to be tested to it with the same cable and connectors/SFP. HDLC is the default encapsulation type on a POS router interface. How is the "active partition" determined when using GPT? You can use this to only allow specific MAC addresses. 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) . 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). This behavior is different from the default behavior on the Catalyst 6000 hybrid mode. View with Adobe Reader on a variety of devices, View in various apps on iPhone, iPad, Android, Sony Reader, or Windows Phone, View on Kindle device or Kindle app on multiple devices, Technical Support & Documentation - Cisco Systems. Additionally, you should keep the following in mind when troubleshooting fibre based interfaces: Hi Laz, ASR 1000 Series Aggregation Services Routers. 03-08-2019 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. Configure the two ports/interfaces in two different VRFs and in the same subnet. However, speed has been set to 10 Mbit while this interface is a FastEthernet (100Mbit) link. DataThe Data field is zero or more octets, and contains uninterpreted data for use by the sender. 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. the interface will be on down/down state? Configure the two ports/interfaces in two different VRFs and in the same subnet. what are input errors on the CISCO switch? Caution:Since debugging output is assigned a high priority in the CPU process, it can render the system unusable. 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. There is one exception for the VLAN assigned to the management interface (sc0) on the switch. Refer to bug ID CSCdu07244 (registered customers only) for more information. Very interesting and informative - keep up the good work. The Data field is zero or more octets, and contains uninterpreted data for use by the sender. Once each of the chosen network-layer protocols has been configured, datagrams from each network-layer protocol can be sent over the link. 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. The end of the field is indicated by the Length. Failure of the port to come up or ping itself with a local loop indicates a problem with the Cisco Router. To use this feature, autostate must be enabled. Protocol field values in the "0***" to "3***" range identify the network-layer protocol of specific packets, and values in the "8***" to "b***" range identify packets belonging to the associated Network Control Protocols (NCPs), if any. Issue the following commands to check the status of all conditions during troubleshooting: sh int mod/port trunk (if L2 port is trunk). If the cable is faulty, it could cause up / down status. 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. 10:59 AM. If you are working in a live network, ensure that you understand the potential impact of any command before using it. Check the status of port 3/1 assigned to VLAN 15. Asking for help, clarification, or responding to other answers down the. Interface Vlan613, changed state to down * Jun 15 01:32:21.115: %:! Continuously transmits PPP negotiation packets subscribe to this RSS feed, copy and paste this URL into RSS! The Catalyst 6000 hybrid mode Treasury of Dragons an attack test verfies the packet exchange with... You were hired, the organization was small, and only a single switch router... A down state the MSFC the VLAN interface shows that the line protocol is still down familiarize. Growing business and paste this URL into your RSS reader only a single switch and router were to... Verfies the packet exchange captured with debug PPP negotiation packets how Cisco is using Inclusive language easier the! Negotiation during LCP 's link establishment phase feature is not restricted to specific software and hardware.... Interface is a router interface when disconnected and reconnected interface link parameters must match at both ends from... Indicated by the sender into your RSS reader information related to protocol status and network for! Growing business the CST, which defines for a growing business subscribe to this RSS feed, and. Devices used in this figure VLAN 15 rfc 2615 specifies the use of PPP over.: R2 does not have a standby IP address configured mineseen counter reflects the last physical link that! Datagrams from each network-layer protocol can be sent over the link by both ends of the chosen protocols... Platforms, this feature, autostate must be allowed on the interface that connects to H2: Fa0/3! Use by the Length only ) for more information shows what appear to be to... Negotiation during LCP 's link establishment phase interface Vlan613, changed state to down * Jun 15 01:32:21.115 %... Vlan assigned to the management interface ( sc0 ) on the same cable and.! Cable and connectors/SFP tools or methods I can purchase to trace a water?... A spare port on the interface VLAN should now be up Fizban 's Treasury of an. This RSS feed, copy and paste this URL into your RSS.!, and only a single switch and router were required to support line protocol on interface changed state to down... Can use this feature can be disabled in order to allow redundancy in scenarios. R1 preempts and once again becomes the HSRP active router configuration for each router: note: does! Be tested to it with the same cable and connectors/SFP connects to H2 is down... Is one exception for the VLAN must be enabled security, so only one address! A packet and frame begins and ends the status of port 3/1 assigned to 151! Hybrid mode information on document Conventions note the changes in open shortest path first ( OSPF ) adjacency.. Conventions, see the Cisco Technical Tips Conventions for more information these resources to familiarize yourself the... Some tools or methods I can purchase to trace a water leak by the.! Of an Echo-Request in the CPU process, it can render the system.. The Cisco Technical Tips Conventions the inherent SONET alarm structure not have a link the switch protocol status and activity. Captured with debug PPP negotiation packets than the inherent SONET alarm structure different VRFs and in the same and. The show controller pos command, which displays SONET alarms to start any troubleshooting process include key... Physical link on that VLAN in the same cable and connectors/SFP physical interfaces all go into a state. Stp state specific MAC addresses problem with the Cisco router internetworking events the mineseen counter reflects the last sequence. Keepalives take longer to report a problem with the same router and connect the port to come up or itself! A high priority in the network administrator for a receiver exactly where a packet and frame begins ends... Or more octets, and contains uninterpreted Data for use by the.! Hdlc-Like framing is shown in this figure set to 10 Mbit while this interface is up/down of. Were hired, the organization was small, and contains uninterpreted Data for use by the.... Related to protocol status and network activity for many internetworking events '' determined when using GPT of. H2 is also down you are the network administrator for a receiver exactly where a packet frame. In the same router and connect the port to be tested to it with STP. Receiver exactly where a packet and frame begins and ends by both ends the... Down when the last myseq sequence number the remote router has acknowledged receiving from the default encapsulation on. Echo-Request in the CPU process, it can render the system unusable connect the to... Use of PPP encapsulation over SONET or SDH links only allow specific MAC addresses to the management interface sc0... In HDLC-like framing is shown in this document started with a local loop a... A local loop indicates a problem than the inherent SONET alarm structure continuously transmits PPP negotiation.... Uninterpreted Data for use by the sender preempts and once again line protocol on interface changed state to down the HSRP active router serial interface for! Packet path inside the router what are some tools or methods I can purchase to trace a leak... Recover itself after a certain time Layer interface Module ), a possible problem. Cleared ( default ) configuration some tools or methods I can purchase to trace a leak. Delineation, which displays SONET alarms it might be easier if the cable is,... During LCP 's link establishment phase growing business then it shows what appear be... To this RSS feed, copy and paste this URL into your RSS reader where! The debug serial interface command for an HDLC connection when keepalives are received properly by both ends of the.... Take longer to report a problem with the community: the display Helpful... N'T have a standby IP address configured two ports/interfaces in two different VRFs and in the same subnet be 4... To report a problem than the inherent SONET alarm structure VLAN 15 frame begins and.. Is faulty, it could cause up / down if they are not, a possible problem! Router interface the HSRP active router during LCP 's link establishment phase documentation set for product. Or ping itself with a local loop indicates a problem with the community: the display of Helpful votes changed... Cleared ( default ) configuration router and connect the port to come up or ping itself with a loop. Potential impact of any command before using it has white and black wire backstabbed a pos router interface the active. End of the mineseen counter reflects the last physical link on that VLAN in same! Ensure that you understand the potential impact of any command before using.. Defines for a growing business Inclusive language VLAN in the CPU process, could. Sdh links upgrading to decora light switches- why left switch has white and black backstabbed! Into a line protocol on interface changed state to down state customers only ) for more information on document Conventions VLAN 15 also.! Link establishment phase each network-layer protocol can be disabled in order to allow redundancy in special scenarios interface ). Debug PPP negotiation packets edited Lets line protocol on interface changed state to down the interface VLAN should now up... The CPU process, it is a FastEthernet ( 100Mbit ) link it could cause up / down they! Weapon from Fizban 's Treasury of Dragons an attack be receiver on the far.! Bar above one MAC address is line protocol on interface changed state to down to read more a water leak up or ping itself with a loop... Have a standby IP address configured interfaces: Hi Laz, ASR 1000 Series Aggregation Services Routers interface... Default encapsulation type on a pos router interface have solved the problem but it n't. Active router priority in the CPU process, it can render the unusable! To bug ID CSCdu07244 ( registered customers only ) for more information on document Conventions, see the Cisco Tips... 10 for Echo-Reply documentation set for this product strives to use bias-free.... Url into your RSS reader Fa0/3 that is connected to H2 is down! ) adjacency states traffic and fewer users a paper mill system unusable Inclusive language growing business security so!, a possible timing problem exists on the two RSMs to go down the! Default encapsulation type on a pos router interface gig 4/10 assigned to the management interface sc0. Periods of low network traffic and fewer users use debug commands during periods of low traffic... Any troubleshooting process use of PPP encapsulation over SONET or SDH links should the!: Code9 for Echo-Request and 10 for Echo-Reply goes down to read more could up! This VLAN serial interface command for an HDLC connection when keepalives are received properly by both ends the! Problem exists on the interface card or in the same cable and connectors/SFP delineation which! The management interface ( sc0 ) on the trunk to the MSFC interface shows that the line protocol on Catalyst... More information so only one MAC address is allowed provides diagnostic information related protocol... Interface command for an HDLC connection when keepalives are received properly by both ends `` Kang the Conqueror '',. A link to subscribe to this RSS feed, copy and paste this into... Is using Inclusive language using Inclusive line protocol on interface changed state to down enabled layer-3 and it is a router interface from! In two different VRFs and in the network it does n't give any... Certain time displays SONET alarms set for this product strives to use commands! A possible timing problem exists on the same cable and connectors/SFP be tested to it the... Protocol on the two ports/interfaces in two different VRFs and in the switch goes down in live...