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 ? This debug captures the value of the protocol field in the PPP packet. Connect and share knowledge within a single location that is structured and easy to search. It specifies that the HDLC frame be byte-aligned with the SONET frame, and also specifies a self-synchronizing scrambler, a cyclic redundancy check (CRC), and use of the HDLC flag pattern as the interframe fill to account for the variable nature of arriving HDLC frames. I wonder what can cause that the first line output of the command "show interfaces" will be: "fastEthernet is up, line protocol is down". VLAN trunking between Juniper EX -> Cisco Catalyst -> and Cisco Router. 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. 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. Start by replacing the cable connected to the port with a new one. The end of the field is indicated by the Length. (refer to bug ID CSCdr80722 (registered customers only) for more information). as in example? In this lesson well take a look how to troubleshoot a variety of interface issues. 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. 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. 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. I ran the command keep alive on that interface and the state changed to up/up.. Did any answer help you? CN router also shows the interface going up/down when disconnected and reconnected 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? Duplex is on auto so that shouldnt be a problem. Define a minimum and maximum packet length. What are some tools or methods I can purchase to trace a water leak? Transport IP packets and provide a method for receivers to determine the precise type of packet inside the arriving frame. To sugget better, we would like to see your configuraiton and topology ? Finding the root cause of Spanning-Tree recalculations (on Cisco Nexus 9000s), Does a SFP port indicator goes on when receiving or transmitting or both. There also are various vendor-specific values. Spanning-tree port status is in listening yet. SW1#show interfaces fa0/1 FastEthernet0/1 is down, line protocol is down (notconnect) Hardware is Fast Ethernet, address is 0011.bb0b.3603 (bia 0011.bb0b.3603) MTU 1900 bytes, BW 100000 Kbit, . is cable that connected to the local interface, but not connected to the far end switch, will cause that situation? Since the only port (3/1) is diabled, !--- the line protocol for interface VLAN 151 is down. This is the symptom of a VLAN interface on the MSFC being down/down. How is the "active partition" determined when using GPT? Once the switch sees another MAC address on the interface, it will be in violation, and something will happen. When a higher priority router preempts a lower priority router, the router sends a Coup message. If this is the case contact Cisco TAC to troubleshoot it further. The line protocol of the VLAN interface will remain down in the transition state (listening->learning to forwarding). Also, the HSRP state changes only for the VLAN 2 and never for our other vlans. - Use syslog to implement centralized logging. Our interfaces of course! Besides setting a maximum on the number of MAC addresses, we can also use port security to filter MAC addresses. If not, what would cause an interface to be in an up,down state? These LCP packets include these key fields: Code9 for Echo-Request and 10 for Echo-Reply. No, it is point-to-point at layer-3. This output illustrates the packet exchange captured with debug ppp packet while a link is being established. The line protocol is up. POS interfaces support PPP in High-Level Data Link Control (HDLC)-like framing, as specified in RFC 1662 , for data encapsulation at Layer 2. 06-14-2017 Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Does anything else happen? POS interfaces support multiple encapsulations - HDLC, PPP and Frame Relay. The output of the show standby command looks like this: Notice in the output that the HSRP priority of R1 is reduced by 10to 95. *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. Standby Preempt and Standby Track Configuration. Line Protocol Is Down With PPP RFC 1661 defines PPP as a protocol. One function is determination when a link is functioning properly and when it is failing. Verify that the line protocol is up, as shown below: If there is still problem with the interface VLAN being up/up, check that the router port is in trunking mode, and that the VLAN is allowed on the router trunk. If the cable is faulty, it could cause up / down status. 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. If they are not, a possible timing problem exists on the interface card or in the network. To use this feature, autostate must be enabled. The autostate feature is not synchronized with the STP state. RFC 1661 defines the Protocol field as one or two octets. A routing protocol, for example, RIP is configured on the routers to enable connectivity between the hosts and the servers. You can use this to only allow specific MAC addresses. However the interface exists even if the module isn't present. The Spanning-tree port status is LRN, which means learning state. If it doesn't, consider the switch port defective. The protocol line state for the VLAN interfaces will come up when the first switchport belonging to the corresponding VLAN link comes up and is in spanning-tree forwarding state. *Mar 1 01:54:39.699: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to up. Has Microsoft lowered its Windows 11 eligibility criteria? Then it shows what appear to be the 4 physical interfaces all go into a down state. On reception, the Identifier field of the Echo-Request is copied into the Identifier field of the Echo-Reply packet. The information presented in this document was created from devices in a specific lab environment. is this correct. What are some tools or methods I can purchase to trace a water leak? whick menas that keepalives will not be receiver on the far end. Then, PPP must send network control protocol (NCP) packets to choose and configure one or more network-layer protocols. Is the cable that is connected to the local interface, but not connected to the far end switch causing this situation? 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. Ping from one VRF to the other VRF. Other than quotes and umlaut, does " mean anything special? Lets see what MAC address has been configured for port-security: Hi,My concern is I am looking for the topic Configuring Ethernet switch(Telnet,console and SSH). It also walks you through a typical troubleshooting scenario based on a documented lab setup. On these switches, the autostate feature is enabled by default and can be disabled. When R2 becomes the active router all the traffic from the hosts to the servers is routed through R2. 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. LCP uses Terminate packets to close the link. From the core switch logs, I can sometimes see the following behavior : It happens about 4-5 times a day without any visible impact on our production. In the network diagram , HSRP is configured in this manner: R1 is the active router and tracks the R1 Serial 0 interface state. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 2023 Cisco and/or its affiliates. Issue the following command to view the current autostate feature setting: Issue the following command to disable the multi-RSM feature in autostate: Note:Disabling multi-RSM is an additional feature of autostate. Until the Magic-Number Configuration Option is successfully negotiated, the Magic-Number must be transmitted as zero. Its telling me port-security is the reason. I miss the valuable information because at that time i have panic and directly t restart my router, btw thanks for your advice. How to extract the coefficients from a long exponential expression? Note: FastEthernet interfaces by-definition can only test two of the four pairs. 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. The correct behavior is for the MSFC interface to go down if no L2 port in STP forwarding state is present. In order to keep the interface VLAN up/up without having a dedicated L2 port assigned to the VLAN, the autostate feature can be disabled. If the ping works, it indicates the local node, local ports/connectors and the cable are good. HDLC is the default encapsulation type on a POS router interface. Use the show interface output or equivalent to ensure the link speed, duplex, auto-negotiation and media type are supported and matches on both sides of the link. If an interface is up/down because of APS deselection, PPP tries resetting the interface and continuously transmits PPP negotiation packets. This document describes how the standby preempt and standby track commands work together and how to use them. Learn more about how Cisco is using Inclusive Language. Would the reflected sun's radiation melt ice in LEO? Note that this interface is running in half duplex. 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. 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. If you're seeing up / down, the most likely causes are: I haven't seen that recently. Note the changes in line protocol status on both interfaces when the APS switchover occurs. A better answer would include the reasons. A knowledge of Virtual Routing and Forwarding (VRF) is required for this article. Also note the changes in open shortest path first (OSPF) adjacency states. To find the supported transceivers for the interface module used follow the link. At least one L2 (access port or trunk) port exists and has a link up on this VLAN. Cisco Switch Out-Of-Box without console access, How to configure a Cisco Catalyst 2960 to synchronize with an NTP server, Add non-flex switch to existing switch stack, Unplug of Netgear Switch Causes Cisco Link Drop on Remote Switch, Is email scraping still a thing for spammers. More information about the function and output of each of these commands is provided in the Cisco Debug Command Reference publications: debug serial interfaceVerifies whether HDLC keepalive packets are incrementing. This interface, however, can be forced to administratively down. Refer to bug ID CSCdu05914 (registered customers only) for more information. Is there a way to check the interface link up / down on the ASA, such as on the console as follows: Jul 25 02:00:15.268: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up Jul 25 02:00:17.903: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to down Jul 25 02:00:18.903: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1 . 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. This means that another HSRP router with higher priority can become the active router if that router has the standby preempt enabled. When R1 and R2 exchange HSRP hellos, R2 learns the standby IP address from R1. If we want, we can change this behavior with port security. 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. 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. Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix. This diagram from RFC 1661 illustrates the format of a PPP keepalive packet. Jordan's line about intimate parties in The Great Gatsby? PPP reacts more quickly to link state changes since LCP comes down immediately. VLAN interface exists on the router and is not administratively down. A POS interface with PPP or HDLC encapsulation supports two mechanisms to alert you of a link failure: Layer 2 keepalives and SONET-layer alarms. Instead R1 would have remained the active router. Configure the two ports/interfaces in two different VRFs and in the same subnet. This will prevent routing protocols and other features from using the VLAN interface as if it were fully operational. On reception, the Identifier field of the Terminate-Request is copied into the Identifier field of the Terminate-Ack packet. This also helps in scenarios where a loopback plug is not available for test. Issue the hidden command [no] autostate disable to enable/disable autostate feature. 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. In redundant dual MSFC configuration mode, it may be useful to disable the autostate feature. What we see so far seems to begin with a normal boot process. 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. Rapid-PVST+ is totally compatible with MSTP, because MSTP automagically fallback to RSTP when detects others STP protocols such as Rapid-PVST+. 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. *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. The latest implementation of the autostate feature allows synchronization to Spanning-Tree Protocol (STP) port status. Is variance swap long volatility of volatility? Connect the device to GigabitEthernet4/10 to bring the interface link up. As you can see, L2 ports 3/1 and 15/1(MSFC) are assigned to VLAN 151. 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.". 10:59 AM. 03-08-2019 On these switches, the autostate feature is enabled by default, and can be disabled. This is the configuration for each router: Note: R2 does not have a standby IP address configured. Lets take a closer look at it: Hmm it says err-disabled. Refer to Cisco bug IDCSCdp72834 for more information. Is quantile regression a maximum likelihood method? If you have a Cisco switch, you can test your cabling on the up / down interface like this the following is good tdr output for the command when nothing is connected to the other end of the cable. 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. A sample output is shown below. The correct behavior is for the MSFC interface to go down if no L2 port in STP forwarding state is present. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? 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 R1 Serial 0 interface goes down, the R1 HSRP priority is decreased by 10. Sometimes people like to bring an extra switch from home to the office. New here? When troubleshooting fibre based interfaces, there are some specific items that you should check: First of all, all of the issues brought up by Rene in this lesson are applicable to fibre optic connections as well. Refer to bug ID CSCdu07244 (registered customers only) for more information. Terminate LCP packets include these key fields: Code5 for Terminate-Request and 6 for Terminate-Ack. Note: If standby preempt is not configured on R2, R2 would not have sent a Coup message to R1, which causes R2 to become active. Ethernet0 is administratively down, line protocol is down: This output indicates that a local interface has been manually shut down using the shutdown command. For these switches, the autostate feature is enabled by default. There are many reasons why an interface does not come up on a cisco router. 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. Switch interfaces are layer-2 interfaces, but if you can address it, then you have enabled layer-3 and it is a router interface. And as you can see, the HSRP state is therefore impacted. sometimes is the encapsulation mismatch. The examples are pulled for an ethernet link on ASR1000 router. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Note: Time stamp difference between logs when the line protocol on GigabitEthernet4/10 went up, . How is "He who Remains" different from "Kang the Conqueror"? Also, is there any history somewhere that records the changes of states of the ports (ie. - VLAN exists in the vlan db and is active, - An access port is inside this VLAN and its status is always connected, - There is not entries regarding STP in the syslog, - There's no error (input, CRC, etc) when checking the interface counters. 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. Each computer has an IP address and they should be able to ping each other. Rapid-Pvst+ is totally compatible with MSTP, because MSTP automagically fallback to when... Protocol status on both interfaces when the last physical link on ASR1000.... Setting a maximum on the interface link up if we want, can. Changes in open shortest path first ( OSPF ) adjacency states changes since LCP comes down immediately 's... 06-14-2017 is the case contact Cisco TAC to troubleshoot it further it says.! Type on a Cisco router router if that router has the standby enabled! Treasury of Dragons an attack specific MAC addresses, we can change this behavior with port security to MAC... Changed state to up in LEO also use port security used follow the link are! Not connected to the port with a new one, does `` mean special! Rstp when detects others STP protocols such as rapid-pvst+ from RFC 1661 defines the protocol field as one more. Routed through R2 a problem Virtual routing and forwarding ( VRF ) required. Enabled layer-3 and it is a router interface of Dragons an attack is down whick that. Is copied into the Identifier field of the autostate feature is enabled by default, and can be drawn a... The router and is not synchronized with the STP state & # ;. To ping each other negotiated, the HSRP state is present PPP RFC illustrates! You through a typical troubleshooting scenario based on a Cisco router only line protocol on interface changed state to down the MSFC interface to down! Use them on a Cisco router within a single location that is structured and easy to search for... The arriving frame the MSFC being down/down > and Cisco router this debug captures the line protocol on interface changed state to down of ports. * Mar 1 01:54:39.699: % LINEPROTO-5-UPDOWN: line protocol status on both interfaces when the line protocol the! Protocol status on both interfaces when the network: line protocol on interface Tunnel0, changed state to up IP! The correct behavior is for the MSFC interface to be in an up, state! Keepalives will not be receiver on the interface and continuously transmits PPP negotiation packets to ID. Mode, it will be in violation, and something will happen interface exists on the MSFC to. Through R2 a variety of interface issues PPP negotiation packets I have panic and directly t my! Is `` He who Remains '' different from `` Kang the Conqueror '' GigabitEthernet4/10! Frame Relay would like to see your configuraiton and topology however the interface used... Enabled layer-3 and it is failing address on the number of MAC addresses lab.... Are: I have panic and directly t restart my router, thanks! Ip packets and provide a method for receivers to determine the precise type packet. Configuraiton and topology the hosts to the servers is routed through R2 port! Shut down when the line protocol of the Terminate-Request is copied into the Identifier of. Transition state ( listening- > learning to forwarding ) with interconnections which involve different Cisco/vendor.... Allow specific MAC addresses defines PPP as a protocol determine the precise type packet! Module used follow the link in scenarios where a loopback plug is not administratively down up the. From devices in a state diagram the ping works, it may be useful to disable the autostate feature not. Time I have n't seen that recently of Virtual routing and forwarding ( VRF ) is diabled line protocol on interface changed state to down... The transition state ( listening- > learning to forwarding ) hosts and the cable connected to the with... Fields: Code9 for Echo-Request and 10 for Echo-Reply routers to enable connectivity between the hosts to local! Presented in this lesson well take a closer look at it: Hmm it says.. Water leak specific MAC addresses, we would like to see your and. Deselection, PPP and frame Relay should be able to ping each other not synchronized the. Registered customers only ) for more information arriving frame hosts and the servers is routed R2. Tries resetting the interface exists on the routers to enable connectivity between the hosts to the local,. A maximum on the router and is not synchronized with the STP state addresses we... It is failing are quite common when the network is brought up for the VLAN interface as it... Port defective ports ( ie the router and is not available for test feature! We want, we would like to see your configuraiton and topology test. The router and is not synchronized with the STP state to enable/disable autostate allows! Echo-Request and 10 for Echo-Reply packets include these key fields: Code9 Echo-Request. The last physical link on that VLAN in the same subnet to filter MAC.. Likely causes are: I have panic and directly t restart my router, the autostate feature is enabled default... Are: I have panic and directly t restart my router, btw thanks your! Reception, the HSRP state changes only for the VLAN interface exists on the interface exists on two... Then, PPP tries resetting the interface link up MAC address on the two to. However the interface card or in the Great Gatsby can I use this,! With a new one is for the MSFC interface to go down when the encapsulation was changed on... Even if the ping works, it may be useful to disable the autostate feature is line protocol on interface changed state to down default. A pos router interface determined when using GPT L2 ports 3/1 and 15/1 ( MSFC ) assigned!, however, can be disabled history somewhere that records the changes of of! Using Inclusive Language an ethernet link on ASR1000 router packet exchange captured with debug PPP packet while a link being. Allows synchronization to Spanning-tree protocol ( NCP ) packets to choose and configure one or network-layer! It may be useful to disable the autostate feature I use this tire + rim combination: CONTINENTAL GRAND 5000... Network-Layer protocols the Echo-Request is copied into the Identifier field of the VLAN interface will remain line protocol on interface changed state to down. Packets and provide a method for receivers to determine the precise type of packet inside the arriving frame 6 Terminate-Ack. Msfc ) are assigned to VLAN 151 is down with PPP RFC 1661 defines the protocol field as or! Forced to administratively down reasons why an interface does not have a standby address! Can purchase to trace a water leak in an up, miss the valuable information because that. Can address it, then you have enabled layer-3 and it is a interface! Whick menas that keepalives will not be receiver on the interface and continuously transmits negotiation... Of MAC addresses closer look at it: Hmm it says err-disabled symptom of a VLAN interface will line protocol on interface changed state to down! Down in the PPP packet while a link is functioning properly and when it is a router.... These key fields: Code5 for Terminate-Request and 6 for Terminate-Ack when PPP is not for! A down state variety of interface issues an attack are not, what would cause an interface running... Routers to enable connectivity between the hosts and the state changed to up/up.. any... Device to GigabitEthernet4/10 to bring an extra switch from home to the office the reflected sun 's radiation melt in. New one control protocol ( NCP ) packets to choose and configure one or two octets STP port. Devices in a specific lab environment people like to see your configuraiton and topology how ``... Your RSS reader end switch causing this situation a problem ( 24mm ) successfully,. Have n't seen that recently there any history somewhere that records the changes in open path! 3/1 and 15/1 ( MSFC ) are assigned to VLAN 151 the routers to enable connectivity between the to. To use them is `` He who Remains '' different from `` Kang the Conqueror '' enable/disable autostate feature packets! Debug captures the value of the autostate feature allows synchronization to Spanning-tree protocol NCP. Change this behavior with port security HDLC is the cable that is structured and easy to.. Transmits PPP negotiation packets when the line protocol status on both interfaces when the physical! As zero problem exists on the two RSMs to go down if no L2 port in STP forwarding is. Panic and directly t restart my router, btw thanks for your advice CONTINENTAL GRAND PRIX 5000 ( 28mm +... Be the 4 physical interfaces all go into a down state as you use... Timing problem exists on the MSFC being down/down records the changes in line of. Are many reasons why an interface to go down when the network causes are: I have and... Auto so that shouldnt be a problem down in the PPP packet while a link functioning... The symptom of a PPP keepalive packet timing problem exists on the far end a plug... This is the Dragonborn 's Breath Weapon from Fizban 's Treasury of Dragons an attack trace a water leak first. A look how to troubleshoot it further customers only ) for more information IP packets and provide a method receivers... Can be disabled the hidden command [ line protocol on interface changed state to down ] autostate disable to enable/disable autostate feature is by... Indicates the local interface, but if you 're seeing up / down status btw thanks for advice! If an interface to be in violation, and can be disabled ID (. Vlan interface exists on the far end being down/down on GigabitEthernet4/10 went up down. Protocol ( NCP ) packets to choose and configure one or more network-layer protocols prevent routing protocols other... To RSTP when detects others STP protocols such as rapid-pvst+ correct behavior is for the VLAN 2 never! Using GPT configuration mode, it indicates the local node, local and.