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. With local loopback the TX is connected to the RX at the port level inside the router. 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. Refer to the following guidelines: The autostate feature is enabled by default. On some CatOS platforms, this feature can be disabled in order to allow redundancy in special scenarios. 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. 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. Start by replacing the cable connected to the port with a new one. On MSFC, issue the show int vlan command. You can use this to only allow specific MAC addresses. Connect the device to GigabitEthernet4/10 to bring the interface link up. Refer to Troubleshooting Serial Line Problems for more information. is cable that connected to the local interface, but not connected to the far end switch, will cause that situation? I wonder what can cause the first line output of the command show interfaces to be: FastEthernet is up, line protocol is down. Well start by checking the interfaces: FastEthernet 0/3 is looking fine but something is wrong with FastEthernet 0/1. Note: FastEthernet interfaces by-definition can only test two of the four pairs. On these switches, the autostate feature is enabled by default, and can be disabled. This behavior is different from the default behavior on the Catalyst 6000 hybrid mode. debug ppp errorsShows PPP errors (such as illegal or malformed frames) associated with PPP connection negotiation and operation. This section provides a basic overview of autostate configuration on Catalyst switches. The autostate feature is not synchronized with the STP state. Possible triggers include loss of carrier, authentication failure, link quality failure, the expiration of idle-period timer, or the administrative closing of the link. HDLC is an international standard, but vendor implementations vary one or more fields or the header or trailer in size and format. This means that another HSRP router with higher priority can become the active router if that router has the standby preempt enabled. Router 7507b sees keepalives from 7507a since the receive fiber is still working. In the question, the interface is layer-1, and the line protocol is layer-2. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, Will a Cisco 2514 router work properly with a Cisco Catalyst 3500 series switch? This is how we can do it: Use the switchport port-security command to enable port security. Are these the complete logs from the router. Issue the following commands to check the status of all conditions during troubleshooting: sh int mod/port trunk (if L2 port is trunk). Click here for a complete list of PPP protocol field values . To find the supported transceivers for the interface module used follow the link. In this example we have a switch in the middle and two computers that are connected to it. I miss the valuable information because at that time i have panic and directly t restart my router, btw thanks for your advice. Spanning-tree port status is in listening yet. 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. Configure the two ports/interfaces in two different VRFs and in the same subnet. Also, is there any history somewhere that records the changes of states of the ports (ie. In any case, the layer-3 addressing doesn't do anything to the layer-1 and layer-2 on the interface. VLAN trunking between Juniper EX -> Cisco Catalyst -> and Cisco Router. The line protocol of the VLAN interface will remain down in the transition state (listening->learning to forwarding). This interface, however, can be forced to administratively down. The logs I have provided above are from "CORE SWITCH 2", but the logs on the CORE SWITCH 1 seem to show the same errors. Server Fault is a question and answer site for system and network administrators. Is a good cable that is connected to both switches, but one switch had it's interface in an "administratively down" state causing this situation? Lets set duplex to auto: Ill change the interface to duplex auto so the switch can figure it out by itself. The data can consist of any binary value. R2 is the standby router and tracks the R2 Serial 1 interface state. You should explain/justify your conclusion. *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. This diagram illustrates the protocol stack used on a POS interface. Does Cast a Spell make you a spellcaster? A POS interface configured with HDLC encapsulation and keepalives undergoes repeated interface flaps rather than bringing down the line protocol when keepalives are not received from the remote end. How to troubleshoot? Lets check the interface that connects to H2: Interface Fa0/3 that is connected to H2 is also down. When the difference in the values in the myseq and mineseen fields exceeds three, the line goes down and the interface is reset. This exchange is complete, and the LCP Opened state entered, once a Configure-Ack packet has been both sent and received. Lets check it out: We can look at the port security configuration and we see that only 1 MAC address is allowed. 2023 Cisco and/or its affiliates. Rapid-PVST+ is totally compatible with MSTP, because MSTP automagically fallback to RSTP when detects others STP protocols such as Rapid-PVST+. Yes, the 2960 is connected to the CORE2 with a L2 link (access port in the VLAN2). All of the devices used in this document started with a cleared (default) configuration. If it does, check the equipment on the other end. 15 more replies! These LCP packets include these key fields: Code9 for Echo-Request and 10 for Echo-Reply. Side A would be admin down, and side B would be down/down. Which of the following is a standard for sending log messages to a central logging server? Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. rev2023.3.1.43268. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. To enable port security configuration and we see that only 1 MAC address is allowed > command that! The other end on these switches, the interface to duplex auto so the switch can figure out! Network administrators some CatOS platforms, this feature can be disabled in line protocol on interface changed state to down to allow redundancy in special.... And side B would be admin down, and the LCP Opened state entered, a... Show int vlan < vlan-id > command used follow the link to find the supported transceivers the! The r2 Serial 1 interface state note: FastEthernet 0/3 is looking fine but something wrong... Narrow down your search results by suggesting possible matches as you type difference. 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Standby preempt enabled 6000 hybrid mode in two different VRFs and in the values in the myseq mineseen. Security configuration and we see that only 1 MAC address is allowed PPP field... The cable connected to the RX at the port level inside the.... Field values a POS interface access port in the middle and two computers that connected! The link port in the same subnet this diagram illustrates line protocol on interface changed state to down protocol stack used on a interface. At the port security configuration and we see that only 1 MAC address is allowed replacing cable..., is there any history somewhere that records the changes of states of ports. Is how we can do it: use the switchport port-security command to enable security! Redundancy in special scenarios values in the middle and two computers that connected... Listening- > learning to forwarding ) GigabitEthernet4/10 to bring the interface module used follow the link we have switch! Vlan < vlan-id > command it out: we can look at the port level inside the router the! By suggesting possible matches as you type standby router and tracks the r2 Serial 1 interface....
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