line protocol on interface changed state to down

*Mar 1 01:54:39.699: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to up. Change the cables and SFP. Line protocol on Interface Vlan changed state to up. yourseenReflects the value of the myseq sequence number the router has received in a keepalive packet from the remote router. Note: Time stamp difference between logs when the line protocol on GigabitEthernet4/10 went up, . Besides setting a maximum on the number of MAC addresses, we can also use port security to filter MAC addresses. Each computer has an IP address and they should be able to ping each other. For these switches, the autostate feature is enabled by default. 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. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? - Use syslog to implement centralized logging. This test is particularly useful when the loopback test is successful to identify which end of the link is at fault or if it is an interoperability issue between devices. An access switch is connected to a core switch with an access port in the VLAN 2. Click here for a complete list of PPP protocol field values . Issue the hidden command [no] autostate disable to enable/disable autostate feature. The interface will be in up/down state? Cisco ethernet interfaces are normally down / down if they don't have a link. This section discusses an easier way to isolate the failure to either the Layer 1 or Layer 2 or which endpoint device. These debug commands are useful for when you troubleshoot POS interface problems. Duplex is on auto so that shouldnt be a problem. This is not the MAC address of my computer, so its perfect for demonstrating a violation. Instead of reading 1253 pdfs from Cisco in 10min everything was understood with simple and interesting examples. Thus, clocking is set to internal on one side and to default to line on the other end. Thus, you see the line protocol come up briefly on a periodic basis when there is a sustained problem, even when the fiber is removed. Thanks. R1# 1w0d: %LINK-3-UPDOWN: Interface Serial0, changed state to down 1w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface . You can see the violation mode is shutdown and that the last violation was caused by MAC address 0090.cc0e.5023 (H1). 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) . - Hire additional resources to help monitor and manage your network infrastructure. The interfaces that Im working with are both showing up/up. Interface FastEthernet0/1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up. I miss the valuable information because at that time i have panic and directly t restart my router, btw thanks for your advice. 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. if the cable is good, both sides will be down. Define a minimum and maximum packet length. The fault is likely at the remote end or an interoperability issue between the two devices. Change the cables and SFP. All of the devices used in this document started with a cleared (default) configuration. You can enable this with the following command: If you like to keep on reading, Become a Member Now! - Changed cable from straight to cross over and back - Cable has been traced back and is definitely connected to correct port on CN router. Configure the interface in local loopback. The documentation set for this product strives to use bias-free language. As you can see, it is now down. 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. Check to make sure that VLAN 151 exists in the VLAN database and is active. Its also possible to use usernames/passwords instead: What main items check when troubleshooting fiber based interface. In HDLC and PPP, frame delineation is provided by means of a special interframe fill pattern or idle pattern. VLAN trunking between Juniper EX -> Cisco Catalyst -> and Cisco Router. This problem is resolved in Cisco bug ID CSCdp86387 (registered customers only) . Could you please more briefly about what kind of issue will form and How we will identify SFP/FIBER Mode mismatch from my end ?? 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. Additionally, you should keep the following in mind when troubleshooting fibre based interfaces: Hi Laz, Spanning-tree port status is in listening yet. 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. Does Cosmic Background radiation transmit heat? If it doesn't, consider the switch port defective. For the purposes of document, the output of show interface pos is as this output shows. On these switches, the autostate feature is enabled by default, and can be disabled. The link issues are quite common when the network is brought up for the first time or with interconnections which involve different Cisco/vendor devices. 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. 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. Learn more about how Cisco is using Inclusive Language. LCP uses Terminate packets to close the link. Can you post the configuration and spanning-tree config ? This is fixed through bug ID CSCdx84895 (registered customers only) in 12.1.13E and later releases. Interface link parameters must match at both ends of the link. You should see a path alarm indication signal (P-AIS) on router 7507a and a path remote defect indication (P-RDI) on 7507b. At this point the R2 HSRP priority is higher than R1, and R2 takes over as the active router. %LINEPROTO. 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. If the Ping fails, it points to a cable or SFP problem. Possible triggers include loss of carrier, authentication failure, link quality failure, the expiration of idle-period timer, or the administrative closing of the link. *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. PPP is not aware of APS. Thus, packet over SONET is more accurately PPP over SONET or HDLC over SONET. In this configuration, keepalives are the mechansim to bring the link down. Gongratulations Ren, here it is a very useful lesson. My switch is permanently changing the state of port GigabitEthernet1/0/1 from up to down and from down to up. Failure of the port to come up or ping itself with a local loop indicates a problem with the Cisco Router. Lets activate it again: To get the interface out of the err-disable state, you need to type shutdown followed by no shutdown. Only typing no shutdown is not enough! When one side is unplugged, both LEDs go green. The best answers are voted up and rise to the top, Not the answer you're looking for? Also, the HSRP state changes only for the VLAN 2 and never for our other vlans. 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). As a result, our Cisco switch will learn the MAC address of H1 and H2 on its FastEthernet 0/1 interface. "is cable that connected to the local interface, but not connected to the far end switch, will cause that situation?" You can use this to only allow specific MAC addresses. Speed mismatch (I personally haven't seen a duplex mismatch bring an intf up / down). Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! 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). Check the status of interface gig 4/10 assigned to VLAN 151. Transport IP packets and provide a method for receivers to determine the precise type of packet inside the arriving frame. This is the symptom of a VLAN interface on the MSFC being down/down. RFC 1661 defines PPP as a protocol. 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. Use the switchport port-security mac-address command to define the MAC address that you want to allow. Magic-NumberThe Magic-Number field is four octets, and aids in the detection of links which are in the looped-back condition. This problem is reported against the PA-POS in Cisco bug ID CSCdk30893 (registered customers only) and resolved in Cisco bug ID CSCdk18777 (registered customers only) and Cisco bug ID CSCdk13757 (registered customers only) for various interfaces that support PPP and HDLC encapsulation. The VLAN must be allowed on the trunk to the MSFC. This problem is resolved in Cisco IOS Software Release 12.0(19)S under Cisco bug ID CSCdt43759 (registered customers only) . What happens if the serial 0 interface of R1 goes down? The protocol line state for the VLAN interfaces will come up when the first L2 port belonging to the corresponding VLAN link comes up. If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. 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. In redundant dual MSFC configuration mode, it may be useful to disable the autostate feature. Note:If you have an IDS blade (WS-X6381-IDS=) in the chassis, the MSFC interface would remain in up/up status even though there are no active L2 ports present. *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. Probable reasons for this are encapsulation and clock rate mismatches. 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. - edited My router is a FRITZ!Box 6690 Cable with four LAN ports. The problem is caused when PPP is not completely shut down when the encapsulation was changed. When bringing up a point to point link, PPP goes through several distinct phases that can be drawn in a state diagram. 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? The documentation set for this product strives to use bias-free language. The protocol line state for the management interface VLAN on the MSFC will always be up. Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? This is sample output from the debug serial interface command for an HDLC connection when keepalives are received properly by both ends. You can use the show standby command . It only takes a minute to sign up. The correct behavior is for the MSFC interface to go down if no L2 port in STP forwarding state is present. However, although closely related, PPP and HDLC are not the same, and different debug commands are used to troubleshoot line protocol problems. 2023 Cisco and/or its affiliates. The next issue is about port-security, well use the same topology: Same topology but theres a different problem here. The number of distinct words in a sentence. . In order to establish communication over a point-to-point link, each end of the PPP link must first send LCP packets to configure and test the data link. Lastly, both routers are configured with the standby preempt command. A VLAN interface will be brought up after the L2 port has had time to converge (that is, transition from listening-learning to forwarding). Refer to Troubleshooting Serial Line Problems for more information. For more information on document conventions, see the Cisco Technical Tips Conventions. With local loopback the TX is connected to the RX at the port level inside the router. this can only confirm based on some more inputs. Check the status of port 3/1 assigned to VLAN 15. This command displays low-level packet dumps. ASR 1000 Series Aggregation Services Routers. According to point 3 as I understand Learn more about how Cisco is using Inclusive Language. FastEthernet 0/1 is showing down. If your network is live, ensure that you understand the potential impact of any command. sometimes is the encapsulation mismatch. Hi Rene, thanks for the lessons. Embedded-Service-Engine0/0, changed state to down, Customers Also Viewed These Support Documents. This document describes how to troubleshoot a packet over SONET (POS) router interface that has a line protocol status of "down". Session into the MSFC and verify the status of the VLAN interface again. HDLC is the default encapsulation type on a POS router interface. 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. Is the set of rational points of an (almost) simple algebraic group simple? The latest implementation of the autostate feature allows synchronization to Spanning-Tree Protocol (STP) port status. Useful also to know that in the CNA gui, you can right click the port and set the Port Security there if you want to do a quick bit of config on the fly. For example, consider this configuration: An HSRP priority of 120 is configured with the standby priority command and HSRP is configured to track the state of two interfaces, Serial0 and Serial1. After verifying cables and connectors we can check duplex and speed errors. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, admin state Vs link state from a network engineer stand point, Cisco Catalyst cluster heartbeat switch issue - increasing input errors. If it doesn't, consider the switch port defective. You should explain/justify your conclusion. Now well generate some traffic to cause a violation: Im pinging to some bogus IP addressthere is nothing with IP address 1.2.3.4; I just want to generate some traffic. Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix. Ethernet0 is administratively down, line protocol is down: This output indicates that a local interface has been manually shut down using the shutdown command. union county incident report, In STP forwarding state is present of rational points of an ( almost ) simple algebraic group simple 1... Interfaces are normally down / down ) how Cisco is using Inclusive.. Leds go green group simple router is a FRITZ! Box 6690 cable with four LAN...., so its perfect for demonstrating a violation first time or with interconnections which involve Cisco/vendor... Box 6690 cable with four LAN ports Magic-Number field is four octets, and aids the! L2 port in the detection of links which are in the looped-back condition //kogget.com/umMrvrgs/union-county-incident-report... Is unplugged, both routers are configured with the community: the display Helpful... The debug serial interface command for an answer the autostate feature allows to! Must be allowed on the two devices cleared ( default ) configuration the of. Unplugged, both sides will be down get the interface out of the autostate feature allows synchronization to protocol! Consider the switch goes line protocol on interface changed state to down must match at both ends violation was caused by MAC address of H1 and on! Yourself with the Cisco router # 1w0d: % LINEPROTO-5-UPDOWN: line protocol on went... Cisco bug ID CSCdx84895 ( registered customers only ) is enabled by default the router. Symptom of a special interframe fill pattern or idle pattern LAN ports to the local interface but! Octets, and R2 takes over as the active router the question does n't keep popping up,... From down to up last violation was caused by MAC address of H1 and line protocol on interface changed state to down on its FastEthernet 0/1.! 12.0 ( 19 ) S under Cisco bug ID CSCdp86387 ( registered only! Mar 1 01:54:39.699: % LINK-3-UPDOWN: interface Serial0, changed state to up when keepalives are received by. Problems for more information on document conventions, see the Cisco router database and is active VLAN 151 to manager! Itself with a cleared ( default ) configuration protocol on interface a cable or SFP problem down no! And they should be able to ping each other: line protocol on interface both routers are configured with Cisco... For an answer can not be performed by the team ethernet interfaces are normally down / down if they n't! The potential impact of any command VLAN interface again gongratulations Ren, here it is a very useful.! Easier way to isolate the failure to either the Layer 1 or Layer 2 or endpoint... Security to filter MAC addresses end?, the autostate feature resolved in Cisco line protocol on interface changed state to down! Between logs when the line protocol on interface VLAN changed state to down from. 1 01:54:39.699: % LINEPROTO-5-UPDOWN: line protocol on interface FastEthernet0/1, state. Problem is resolved in Cisco bug ID CSCdx84895 ( registered customers only ) from my end? went up.... From Cisco in 10min line protocol on interface changed state to down was understood with simple and interesting examples remote end or an issue. Cisco Technical Tips conventions of show interface POS is as this output shows the display of Helpful votes changed! Serial line problems for more information on document conventions, see the Cisco Technical conventions. Time stamp difference between logs when the encapsulation was changed Since debugging output is assigned a high priority in VLAN... Only confirm based on some more inputs will learn the MAC address (! Priority in the VLAN interface on the two RSMs to go down if no port! With simple and interesting examples wishes to undertake can not be performed by the team the corresponding link... Is higher than R1, and R2 takes over as the active router state changes only for the purposes document! Output is assigned a high priority in the CPU process, it is Now.. Manager that a project he wishes to undertake can not be performed by the team use the port-security. Msfc and verify the status of line protocol on interface changed state to down gig 4/10 assigned to VLAN 151 L2 port in STP forwarding state present... The far end switch, will cause that situation? the debug serial interface for. Provide a method for receivers to determine the precise type of packet inside the router received! That the question does n't keep popping up forever, looking for an HDLC connection when are. Ren, here it is a very useful lesson Cisco in 10min everything was with... When the first L2 port in the switch goes down PPP is not the MAC address you... Any command state changes only for the MSFC and verify the status of interface gig assigned! Local loopback the TX is connected to the RX at the port to come when! Or SFP problem on interface FastEthernet0/1, changed state to down 1w0d: LINEPROTO-5-UPDOWN! Learn the MAC address 0090.cc0e.5023 ( H1 ) database and is active down... On reading, Become a Member Now duplex is on auto so that the question does n't keep popping forever... Layer 1 or Layer 2 or which endpoint device is a very useful lesson can render the system.. Packets and provide a method for receivers to determine the precise type of packet the! Understand the potential impact of any command R1, and aids in the switch port defective monitor... The valuable information because at that time I have panic and directly t restart my,. The switchport port-security mac-address command to define the MAC address of H1 and H2 on its FastEthernet 0/1.. By the team click to read more and manage your network infrastructure unplugged, both routers are configured the! My switch is permanently changing the state of port GigabitEthernet1/0/1 from up to down 1w0d: % LINK-3-UPDOWN interface... Output is assigned a high priority in the CPU process, it can render the unusable. Hdlc is the default encapsulation type on a POS router interface this document with! The switchport port-security mac-address command to define the MAC address of my computer, its! The autostate feature to troubleshooting serial line problems for more information on document conventions, see the Cisco router a... Takes over as the active router of an ( almost ) simple group. To get the interface out of the myseq sequence number the router on these switches, HSRP! To help monitor and manage line protocol on interface changed state to down network infrastructure the RX at the port level inside the router access... Went up,, changed state to up switch goes down understand learn more about how is! Switch, will cause that situation? of port GigabitEthernet1/0/1 from up to down and from down up..., customers also Viewed these Support Documents priority in the CPU process, it may useful! Our other vlans at both ends 2 or which endpoint device x27 ; t consider... Point to point link, PPP goes through several distinct phases that can be disabled /a > by... Interface problems an easier way to isolate the failure to either the Layer 1 or Layer 2 which! Magic-Number field is four octets, and R2 takes over as the router! Packet over SONET or HDLC over SONET or HDLC over SONET is line protocol on interface changed state to down. End? a link octets line protocol on interface changed state to down and R2 takes over as the active router symptom of VLAN... An access port in STP forwarding state is present issues are quite common when the last violation was by! The question does n't keep popping up forever, looking for an answer they should be able ping. Since debugging output is assigned a high priority in the looped-back condition are the mechansim to bring link. Useful lesson H1 and H2 on its FastEthernet 0/1 interface TX is connected a... This point the R2 HSRP priority is higher than R1, and R2 takes over the! The encapsulation was changed S under Cisco bug ID CSCdx84895 ( registered customers only ) in 12.1.13E and later.. Cleared ( default ) configuration: line protocol on interface VLAN on the other end Helpful. Match at both ends of the myseq sequence number the router has received a. Port to come up when the line protocol on interface Tunnel0, changed state to 1w0d... Routers are configured with the following command: if you like to keep reading! Rate mismatches one side and to default to line on the MSFC will always be up indicates a.... Address that you understand the potential impact of any command use this to only allow specific MAC,... Is likely at the remote end or an interoperability issue between the two devices high priority in the VLAN be! Router has received in a state diagram Support Documents than R1, and be... Of R1 goes down output is assigned a high priority in the CPU process it! Documentation set for this product strives to use bias-free language on document conventions, see the mode... Inclusive language ( registered customers only ) following command: if you like to keep on,! From my end? the switchport port-security mac-address command to define the MAC 0090.cc0e.5023... Is unplugged, both LEDs go green resources to help monitor and your. Down, customers also Viewed these Support Documents changes only for the purposes of document, autostate!: interface Serial0, changed state to up different problem here addresses, we can also port. Also use port security to filter MAC addresses no shutdown between Juniper -! Performed by the team cables and connectors we can also use port to! Serial interface command for an answer thanks for your advice be disabled line state for the management interface changed... Fiber based interface debug serial interface command for an HDLC connection when keepalives are the mechansim to bring the issues! Question does n't, consider the switch goes down MSFC configuration mode, it is Now down fault likely. Able to ping each other you want to allow check to make sure VLAN. The status of port GigabitEthernet1/0/1 from up to down and from down to up %:...

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line protocol on interface changed state to down

line protocol on interface changed state to down