The frame format for PPP in HDLC-like framing is shown in this figure. Note:If you have an IDS blade (WS-X6381-IDS=) in the chassis, the VLAN interface would remain in up/up status even though there are no active L2 ports present. 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. Note:Autostate synchronized with STP was introduced in code 12.1(8a)E and later. Note that this interface is running in half duplex. Then it shows what appear to be the 4 physical interfaces all go into a down state. During this time, you monitored log messages from your router and switch directly from each device's console. Changing it to auto-speed brings back the interface to the land of the living. The documentation set for this product strives to use bias-free language. Change the cables and SFP. 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. In any case, the layer-3 addressing doesn't do anything to the layer-1 and layer-2 on the interface. Lastly, both routers are configured with the standby preempt command. Here is a conceptual diagram of the switches involved into this situation : CORE SWITCH 1 [HSRP active] (3750X) <------ trunk link with many vlans ------>CORE SWITCH 2 [HSRP standby] (3750X) <--- mode access vlan 2 ---> Access switch (2960X). Configure the two ports/interfaces in two different VRFs and in the same subnet. This interface, however, can be forced to administratively down. 09:23 AM. If the router on the second RSM is in trunking mode, the VLAN will be allowed on the ISL trunk. When both these tracked serial interfaces (serial 0 and serial 1) go down, the resultant priority is 100. The line protocol being down indicates a clocking or framing problem. At least one L2 (access port or trunk) port exists and has a link up on this VLAN. keepaliveIndicates whether keepalives are set. For example, on switch interface configure an IP address 192.0.2.0/31 and on server interface configure 192.0.2.1/24. At least we now know that there are no cable, speed or duplex errors. who is the root bridge here ? On reception, the Identifier field of the Echo-Request is copied into the Identifier field of the Echo-Reply packet. Other than quotes and umlaut, does " mean anything special? Heres an example for the console and SSH: Configuring Cisco router for the first time. However the interface exists even if the module isn't present. Ask a question or join the discussion by visiting our Community Forum, Get Full Access to our 758 Cisco Lessons Now, FastEthernet0/1 is down, line protocol is down (notconnect), Half-duplex, Auto-speed, media type is 10/100BaseTX, FastEthernet0/3 is down, line protocol is down (notconnect), Auto-duplex, 10Mb/s, media type is 10/100BaseTX, Port Status : Secure-shutdown, 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, Check the SFP or GBIC status by issuing the. %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to down. Debugging during these periods decreases the likelihood that increased debug command processing overhead affects system use. All of the devices used in this document started with a cleared (default) configuration. The Telecordia GR-253 specification, which defines SONET, discusses HDLC-over-SONET Mapping (see Issue 3, Section 3.4.2.3, pp.3-59.) 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. Check to make sure that VLAN 151 exists in the VLAN database and is active. Alternately, when performing this test, execute the show controller pos command, which displays SONET alarms. The problem is caused when PPP is not completely shut down when the encapsulation was changed. What tool to use for the online analogue of "writing lecture notes on a blackboard"? If it doesn't, consider the switch port defective. There is one exception for the VLAN assigned to the management interface (sc0) on the switch. When a lower priority active router receives a Coup message or a Hello message from an active, higher priority router, the router changes to the Speak state and sends a resign message. Cisco ASR 1000 Series Aggregation Services Routers, View with Adobe Reader on a variety of devices, View in various apps on iPhone, iPad, Android, Sony Reader, or Windows Phone, View on Kindle device or Kindle app on multiple devices, There are many reasons why an interface does not come up on a cisco router. Interface link parameters must match at both ends of the link. Thanks for contributing an answer to Server Fault! On these switches, the autostate feature is enabled by default and can be disabled. When the difference in the values in the myseq and mineseen fields exceeds three, the line goes down and the interface is reset. Line protocol on Interface Vlan changed state to up. The output of various debug privileged EXEC commands provides diagnostic information related to protocol status and network activity for many internetworking events. The line protocol is up. This test excludes the SFP and the cables in the packet path. This is fixed through bug ID CSCdx84895 (registered customers only) in 12.1.13E and later releases. If the R1 Serial 0 interface goes down, the R1 HSRP priority is decreased by 10. Configure the interface in local loopback. Interface FastEthernet0/0, changed state to up *Mar 1 00:07:24.539: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0 . Also note the changes in open shortest path first (OSPF) adjacency states. 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. Oct 1 05:35:25 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to down. RFC 1661 defines PPP as a protocol. Line protocol on Interface GigabitEthernet1/0/1, changed state to down, The open-source game engine youve been waiting for: Godot (Ep. . Can you confirm that at least some of the interfaces are connected to devices that are powered up and attempting to connect to the router? Define a minimum and maximum packet length. Keepalives are disabled automatically on most POS router hardware. Why does the line protocol for this specific VLAN sometimes go up/down ? In redundant dual MSFC configuration mode, it may be useful to disable the autostate feature. Also, is there any history somewhere that records the changes of states of the ports (ie. The protocol line state for the management interface VLAN on the RSM will always be up. What can I do? New here? Thus, clocking is set to internal on one side and to default to line on the other end. In such a situation, R1 preempts and once again becomes the HSRP active router. If you are working in a live network, ensure that you understand the potential impact of any command before using it. When one side is unplugged, both LEDs go green. Due to this, the autostate feature will not work on L3 module interfaces if the L3 module is not properly configured. (Refer to the APS Technology Support Page for more information.). Heres what you will see: We have a security violation, and as a result, the port goes in err-disable state. In order to configure R2 with a standby IP address (same standby address configured on R1) is also a valid configuration. A transition to this phase produces an UP event to the link control protocol (LCP), which provides several functions. 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 line protocol is down because the interface is in the transition state (listening->learning to forwarding). VLAN interface exists on the router and is not administratively down. (refer to bug ID CSCdr80722 (registered customers only) for more information). Thanks Lus! Another card inserted in the same slot experiences this problem. 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. Configure the two ports/interfaces in two different VRFs and in the same subnet. Enable port 3/1, as shown below. As you can see, it is now down. Hi, can you provide the configs of 3 switches? As R2 was configured for standby preempt at the time that the R2 priority became higher, R2 becomes the active router and R1 becomes the standby. So I think it may affect layer 2. Lets take a closer look at port security: Here is a useful command to check your port security configuration. Another weird behavior that my be related to my other post but as I'm not sure, I prefer opening a new thread. Thanks. If the router and port ASICs are properly initialised the interface must come up and self ping must work. When R2 becomes the active router all the traffic from the hosts to the servers is routed through R2. Once the switch sees another MAC address on the interface, it will be in violation, and something will happen. For retransmissions, the Identifier can remain unchanged. *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. This document discusses why this happens, and how the L3 and L2 interfaces interact with each other in the control plane after being activated. The value in this field identifies the datagram encapsulated in the Information field of the packet. Could you please more briefly about what kind of issue will form and How we will identify SFP/FIBER Mode mismatch from my end ?? Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Use syslog to implement centralized logging. 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. this can only confirm based on some more inputs. The last MAC address seen on the interface is 000c.2928.5c6c. 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.". New here? 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. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I found the problem! debug ppp negotiationShows PPP packets transmitted during PPP startup, where PPP options are negotiated. This problem is resolved in Cisco IOS Software Release 12.0(19)S under Cisco bug ID CSCdt43759 (registered customers only) . Does Cosmic Background radiation transmit heat? The VLAN must be allowed on the trunk to the MSFC. Line protocol on Interface Vlan613, changed state to down *Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/ . 2023 Cisco and/or its affiliates. The fault is likely at the remote end or an interoperability issue between the two devices. The sc0 should always be up after the switch boots. 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
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