Interface down troubleshooting cisco. Verify Interface Configuration.
Interface down troubleshooting cisco When controller is up, all interfaces under it will go up initially, but will go down if keepalives are missed. currently my main goal is to see the IPsec tunnel works between the two ASA firewalls. If you have a new router without a config, and do not go through the initial config dialog, the interfaces will be administratively down until you manually start them by entering no shutdown in interface config mode. precedence Show interface precedence accounting info. 857: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/16, changed state to down Hi, I have a switch in site A that is connected to the core network PE router (managed by a different team) by a Cat6 cable. It was my understanding that vlan database was being phased out and that interface vlan should be the method used. 0(4)SV1(1) OL-19427-05 Chapter 7 I configure ATM interface on Cisco 2800 router series, I perform the following steps 1. There are no input/output errors on the multilink virtual interface, no drops, etc. Do you have similar issue The status is typically expressed with the physical status first and the line protocol status second. The router is very reliable at detecting errors. Can anyone guide me on show interface or show interface status would show speed and duplex. Initial Release. Change the address of the serial0/1 interface of R1 to 192. However, there is authentication issue for one which is taking one of this "down". Configure IP Address for ATM 0/0/0 3. Here’s how you can troubleshoot: 1. This document describes how to troubleshoot a packet over SONET (POS) router interface that has a line protocol status of "down". Hello all. > Where exactly is the loop placed? > Loop is facing which direction? > What does that inband CSU code mean? > If I 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. 8f6d. The problem is related only to the Is there a quick way to shutdown the interface and leave it down? The fastest way we found was to change it to CLI mode and shutdown the interface via the CLI. Requirements. It is not the case for Ethernet/FastEthernet interfaces. Swap phone, Speaker, other endpoint with known good device, or newer device . 591 UTC: esd[163]: %INFRA-ESD-6-PORT_STATE_CHANGE_LINK_DOWN : The physical link switch# show interface ethernet 2/45 Ethernet2/45 is down (Administratively down) Hardware is 10/100/1000 Ethernet, address is 0019. Components Used. what could be the issue? serial interface down/down I checked . When I connect them to a switch, it shows up/up. Cisco Catalyst 9300 Series Switches mpls-exp Show interface MPLS experimental accounting info. But found that after deployed macsec, physical port status is up, but protocal is down. A port flap, also referred to as a link flap, is a situation in which a physical interface on the switch continually goes up and down, three or more times a second for duration Solved: Hi, I have two cisco routers with tunnels between them. The Solved: >>serial interface up/down we have private line. if line status is administratively down, interface is disabled by shutdown command. random-detect Show interface Weighted Random Early Detection (WRED) info Note: If there is only one vSmart in the overlay and max-control connections is set to the default value of 2, a persistant control connection is maintained to vBond in addition to the expected connection to vManage and vSmart. Introduction. Cellular Background; What is a Bundle: - the ability to aggregate multiple interfaces together in an L2 manner, based on the standards defined in 802. This configuration is available under the tunnel-interface configuration of the sdwan interface section. 7-2 Cisco Nexus 1000V Troubleshooting Guide, Release 4. Troubleshoot Examples. I checked the other end of the link and that port channel interface has a last output of 1 week ago, and last input of 00:00:00. com. As apart of troubleshooting, we reseated the cables and plugged properly. Step 3 Troubleshoot a Downed Interface. This test is particularly useful when the If the port is administratively down, you need to enable them executing: no shutdown, you can enable them using: using a range command: interface range fa0/1-48 no shutdown . This document d escribes how to troubleshoot the layer 1 link flap issue on Nexus 9000 switches. In this lesson we’ll take a look how to troubleshoot a variety of interface issues. For more information on troubleshooting a VLAN interface in up/down or down/down status, refer to Understanding and Troubleshooting the Autostate Feature in Catalyst Switches. I recieve these traps saying that the remain ports are down. 4dd8) MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA auto-duplex, auto-speed Beacon is turned off Auto-Negotiation is turned I changed a little bit my topology. 4dd8) MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA auto-duplex, auto-speed Beacon is turned off Auto-Negotiation is turned We tried putting in the Proline SFP but even though it was detected, it wasn't passing any traffic. - None of the interfaces are "administratively shut" D. If speeds are mismatched link would fail, it would show line status down, protocol status down. Underlying Fibre Channel Over Ethernet (FCOE) VLAN ID for the Configured VSAN is overlapping with the default Reserved Vlan range set on the 64XX conflict between the FCOE VLan ID for the VSAN configured and Reserved VLAN led the FC port to be in Admin down state. I have connected my laptop into the other gateway router on site with the same IP info as my preconfigured router and the interface works fine. 7e60 (bia Troubleshoot a Downed Interface. Check the configuration of FastEthernet 0/0 on the router: arduino; Copy code switch# show interface ethernet 2/45 Ethernet2/45 is down (Administratively down) Hardware is 10/100/1000 Ethernet, address is 0019. 2 code, I have an interface where the logs show its line protocol has gone up and down several times this morning. Background Information A Fabric port is an interface which connects between an ACI mode Leaf switch and Spine switch. Click All to see the list of all devices from the inventory, and you can choose any device to run the workflow. 076c. 3Mbit down and 2. Thanks . I have 2 Nexus 7700 VDCs configured in a VPC running VXLAN BGP EVPN fabric. The interface kept saying down. Troubleshoot the Most Common Port and Interface Commands for Cisco IOS. This usually happens Hi all, I have 2650 XM Router connected to Cable modem. 2) make sure the switch port is not in a "shutdown" or "errdisable" state. That is all I did I disabled the new subinterface on the fw. 0Mbit up. Tracks interface status and on down state executes 'show log' , 'show Introduction. The keep alive is 3 2 on both of them. The problem appears to be due to the Bridge Domain tied to the vni being down. The controller is In Cisco Viptela Solution, the use cases for GRE Interfaces include: Send traffic to ZScaler (HTTP-Proxy) via vSmart Data-Policy or locally. This example illustrates how the information must be displayed I've seen creating Vlans two ways, through vlan database and through interface vlan. Cisco 8000 Series Routers. I would see all the steps to grab the information to know the actual root cause of the failure. The BVI/BDI interface would act as the routed interface for those two bridged physical • Troubleshooting Using the show interfaces serial Command (BRI) and serial interfaces on a Cisco 2503 access server. If the router and port ASICs are properly initialized, the interface must come up and self ping must work. Cisco recommends that you have a familiarity with the Cisco Nexus Operating System (NX-OS) and basic Nexus architecture before you proceed with the information that is described in this document. Cisco Catalyst 9300 Series Switches This section illustrates the examples for these troubleshooting steps on the platforms Cisco 8000 Series routers, Cisco ASR 9000 Series Aggregation Services Routers, and Cisco NCS 5500 Series routers respectively. Revision Publish Date Comments ; 1. And the inter-connection is using MetroEthernet. At the same time, trunk port and port connected to server are stable. Verify Interface Configuration. Change the subnet masks of both interfaces to 255. On the APIC GUI, you must see this fault: Fault F1296: A vPC interface goes down while peer interface is also down. Administratively down/down - This implies that the interface has been administratively shut down. private-vlan Show interface private vlan information. 2 I only got 2 conneted interfaces in my WLC0 (port 1 and port 2). The log files look like this: The log files look like this: Oct 17 21:20:08. We were sort of left high and dry by After a reload, some RJ45 interfaces on Cisco Nexus N9K-C93108TC-FX3P and N9K-C93108TC-FX3H Switches might not come up, even when connected. Could there be an issue with the port channel that I should look into further troubleshooting? Below are Contributed by: Akshay Shahane This video describes on how to troubleshot and isolate interface down or flapping issues on the Nexus switches. When both interfaces are up we regularly are seeing 1. Solved: Hello Experts: Can somebody confirm the troubleshooting steps in order to find out the root cause of the router reboot. Test the Ports and Cables with VRF. According to Administratively down . This document describes steps to troubleshoot ACI out-of-band (OOB) and in-band (INB) management. I believe that's because it isn't active. sh int fa0/0 FastEthernet0/0 is up, line protocol is up Hardware is AmdFE, address is 000f. Background here is the site was originally working over 4G, but we have now connected a new wired WAN to the router (ISR1111). The individual ports in the channel have seemingly fine input and outputs, ranging from 0 to a few seconds ago. Check connected file systems for the crashinfo file (typically flash or bootflash) and research its contents. Interface down troubleshooting workflow support is available only for the following network devices with software version 16. Device Sleep Mode. 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) switch# show interface ethernet 2/45 Ethernet2/45 is down (Administratively down) Hardware is 10/100/1000 Ethernet, address is 0019. I'm seeing frequent flaps where the port goes down, stays down for a few seconds, and then comes back up. Prerequisites Requirements. However, if your SDH team doesn't Bias-Free Language. (Note that some output is not shown. If duplex are mismatched Contributed by: Akshay Shahane This video describes on how to troubleshot and isolate interface down or flapping issues on the Nexus switches. You can verify it using the command Learn more about how Cisco is using Inclusive Language. After installing a backup controller a few months, I now have regurlarly those kind of critical alarms in Cisco Prime 3. Fault code F1394 occurs when any such fabric port goes down. In the running config, Vlan 7 does exist, though in the show vlan, it doesn't. Tags: ports,interface,down,Nexus,layer1. Cisco Catalyst 3850 The same port is going up and down many times and it is not about one switch or one user. Configure the Interface in Local Loopback. This table shows the most common commands used to troubleshoot the port or interface problems Check if the admin state of the interface is down. 1ax/802. Tags: ports,interface,down,Nexus,layer1 Hi All, I have a multipod fabric with the following APIC distributions Pod1 - 2 APICs (APIC1 & 2 - both have joined the clustrer) Pod2 - 1 APIC (APIC3 - not joined as Bond0 and OOB are down) Pod3 - 2 APICs (APIC4 & 5 - Troubleshoot a Downed Interface. There are no physical layer issues on the T1 controllers (no code violations, slip seconds, errored seconds). code : F1394 cause : interface-physical-down descr : Introduction. 1ad - A group of physical interfaces with the same: speed,media, peer - Treated as a single interface by higher layer protocol (one MAC, one IP, one set of configu Hi guys, I have Cisco 3750 switch and 7970 IP phones connected to it. Below is the example of those po I have an odd issue where my cellular interface seems to have lost its connection. Administratively Down E1 Controller. 1)confirm interface status is okay. 9. Sprint verifies seeing similar results on their interfaces. Contents. ) The show controllers output You have not specified which specific tunnel is down. 1) check and make sure the cable is a straight-through cable and not a cross-over cable. I configured both, but the VTI interface is still in down Move the cable to a known good port to troubleshoot a suspect port or module. Its a CE Router. After debug the mka policy, found •Preventing Traffic Disruptions • Problem: Switch Does Not Join the Stack • Problem: Stack Ring Is Not Operating at Full Bandwidth • Problem: StackWise Port is Flapping • Resolving Version Mismatches and Copying Interface Change to Operational Down. When the interface goes down, you will see "state is reset". The material from this Introduction. but I cannot understand why the router interfaces won't come up. Learn more about how Cisco is using Inclusive Language. Site B also has the exact same setup and LAN equipment, just different VLANs to the CN PE router. I replaced my vsrx-milan with an ASAv firewall. The host does not bridge between the two adapters, nor do the switches bridge between the two. mtu Show interface mtu. According to your document, high overrun errors may be because oversubscription on an interface. However, when I do a show Contributed by: Akshay Shahane This video describes on how to troubleshot and isolate interface down or flapping issues on the Nexus switches. on a 3750e running 12. We are troubleshooting an issue with cisco 7609 and need to create TCL script that does the following. Let’s walk through a couple of scenarios I will use the following topology: In this example we have a switch in the middle and two computers that are Failure of the port to come up/ping itself with a local loop indicates a problem with the Cisco Router. private line terminates to csu/dsu and than goes to our router. N7K2-ADMIN-N7K2-LEAF2(config-router)# sh nve vni Codes: CP - Contro Solved: Hello, I was reffered to this discussion board by cisco support. show interface or show interface status or show ip int brief commands would show the protocol status and line status of the each interface. I'm having some problems with an interface of my cisco router, actually, with any interface. Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix Configure the Interface in Local Loopback This test verfies the packet path inside the router all the way till Physical Layer Interface Module (PLIM). Goes up and down. Troubleshooting Interface Down Problems - Huawei Solved: I am trying to figure out a script or SLA configuration which applies the Shut/No Shut command if an interface goes down on a cisco switch, 3750 Can anyone guide me on this issue ? Below is what I have for the SLA Config, however, the Hi All In Cisco MDS we got link failure and some ports are down and its associated with IBM AIX server. The MAC address tables are not affected by link failure. 4dd8) MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA auto-duplex, auto-speed Beacon is turned off Auto-Negotiation is turned Migration completed successfully however the FC port is showing Admin Down. From server side , user is unable to login a Click the Interface Down tab. Could you please provide: show ip int Router# show ima int br Interface ATM0/IMA1 is down Group index is 11 Ne state is insufficientLinks, failure Troubleshooting Router Hangs; Cisco Interfaces and Modules Product Support; Technical Support & Documentation - Cisco Systems; Revision History. To the upper protocol, the link is still there, although the bandwidth is diminished. Not familiar with Huawei, but in the Cisco world a "DOWN/DOWN" state on an interface relates the first "DOWN" condition to the physical layer. 8-3. 240 - Layer 3 troubleshooting switch# show interface ethernet 2/45 Ethernet2/45 is down (Administratively down) Hardware is 10/100/1000 Ethernet, address is 0019. Up/down - This implies that, even though the tunnel is administratively up, something causes the line protocol on the interface to be down. Interface Link Parameters must Match at Both Ends of the Link. Port has everything on auto. errors do not stop. Hello, I have a Nexus 9K trunked to a C9200L On the Nexus 9K the port is: interface Ethernet1/19 switchport switchport mode trunk switchport trunk native vlan 888 switchport trunk allowed vlan 1,254,995 no shutdown On Let me preface my post by saying that I am extremely new at configuring and working on Cisco switches, so I may not be using the correct phrasing or terms to describe my problem. Check the FEC status on both the router and the peer device. 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. Prerequisites. It has input errors. Creating PVC and mapping protocol Address But my ATM interface still shut down. Service chaining ; There are cases, when the GRE interface may not come up and/or not working. This means the interface is resetting hardware in the attempt to recover the circuit. The documentation set for this product strives to use bias-free language. Primary service GRE interface with default-back-up to the data center. serial inteface shows down/down. Cisco Catalyst 3850 Series Switches. Please refer the following link for further troubleshooting & provide more information of relevant "show" and 'debug" outputs. what should i do in order to have line protocol up Thank you for your help Contributed by: Akshay Shahane This video describes on how to troubleshot and isolate interface down or flapping issues on the Nexus switches. The end device of the port is a sharp printer. EDIT: I shut that interface down completely on the standby, the failover status becomes . As fastethernet shows up/down even when the interface has no cable when I connect the interfaces with the other gateway router on site the interfaces stay 'down, down' and will not come up. Thanks Solved: I've stumbled across something that a little puzzling, at least to me. Deleted the anyconnect profile and settings, set the ports back as they were and deleted the vlan on the switchbut same. There are many different scenarios where an interface may be UP/DOWN but (and correct me if I am wrong all) I cannot think of any circumstance in with the line protocol would be up and the physical interface is down. I seem to be having a problem getting the L3 VNI for the Tenant to come up. With Detailed Troubleshooting First Things to Check Alarms Show Controller Optics CoherentDSP Show Controllers PHY NPU Summary Collect Logs Introduction This document describes how to troubleshoot interface down, or interface flap issues. The issue is that every time the switch is started up the ports connected to IP phones go down (down down to be more precise). I have read some of the posts about nothing being plugged into the ports, but I have a Router connecte Send document comments to nexus5k-docfeedback@cisco. Tags: ports,interface,down,Nexus,layer1 Hello, why is gig interface with fibre cable and serial interface show interface status as down/down when other end port is shut or cable is pulled off but fastethernet port show up as up/down even if you pull the cable at both ends. 4dd8) MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA auto-duplex, auto-speed Beacon is turned off Auto-Negotiation is turned Troubleshoot a Downed Interface. The vManage "Reset an Interface" process described switch# show interface ethernet 2/45 Ethernet2/45 is down (Administratively down) Hardware is 10/100/1000 Ethernet, address is 0019. 4dd8) MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA auto-duplex, auto-speed Beacon is turned off Auto-Negotiation is turned Bias-Free Language. Send document comments to ne xus1k-docfeedback@cisco. Pay attention to timestamp of the port flap to determine if it happens rapidly, or intermittently and if a sleep setting is the cause. Enable controller for ATM interface 2. Configure the serial0/1 interfaces on R1 and R2 with the no shutdown command. RP/0/RP0/CPU0:Mar 6 23:01:56. Up. Book Contents Book Contents. Bad or Old endpoint device. - Layer 3 troubleshooting. Troubleshooting tips for checking interface on switches. I have checked many switches that are located in different buildings and these had same kind of logs! the port is going down for like 2 seconds and up again why is this happening? two switches are doing this very often: WS-C2960-24TC-L Version 12. pruning Show interface trunk VTP pruning information. 0. 3, and later: Cisco Catalyst 3650 Series Switches. 4. Note: This issue can be triggered by a switch reload that occurs for any reason, including a software upgrade, software reset, system crash, or the power being turned up or down. This host: Secondary - Standby Ready What you describe (interface up/down is the physical layer and line protocol up/down is the layer 2 status) is the case for most serial interfaces. I thought about specifying the link speed on the interface, but didn't know you can't do that Administratively down/down - This implies that the interface has been administratively shut down. Tags: ports,interface,down,Nexus,layer1 C. In those situations, check for I have two 2801 routers, when I connect them with a CAT-5 cable to each other, then show up / down. Troubleshoot Methodology . 2(55)SE12 Making me think i have a failed physical interface on the standby, yet the interface is up up so I'm not quite sure what i'm reading. I tried to change cable and hard code speed to match printer setting. This is Hello, I am experiencing an issue with a interface on an ISR router; the interface status remains down, line protocol down. . Refer to Understanding the show controllers e1 Command for more information on how to read the show controller e1 command output. i changed cable also still same thing. Note: SFPs are new In syslogs i notified link failures and the port is down. After lots of troubleshooting, I’m unable to get the port Gi1/0/1 up, it’s always in the state down/down (notconnect). Remember, even though you bind the vfc to the port-channel in the configuration, the vfc is really bound only to the Ethernet If a link goes down in a port channel, the upper protocol is not aware of it. Conventions. Background Information. You can read the file by "more " command or by ftp'ing it to your I am trying to figure out a script or SLA configuration which applies the Shut/No Shut command if an interface goes down on a cisco switch, 3750 . Down. 1. I notice now that the cellular interface has lost its layer 3 address despite showing as u For example, you want to bridge two interfaces on the router, and you want them to be in the same Layer-2 broadcast domain. Connect a device to an interface in that particular VLAN to bring the interface up. Resolution. Was this Document Helpful? Yes No If the interface status is "Protocol Down" while the line status is "Up," the issue typically points to Layer 2 or Layer 3 problems, such as mismatched encapsulation, interface settings, or cabling. E. This usually happens Perform Layer 1 troubleshooting Introduction This document describes steps for remediation of ACI fault F1394: interface-physical-down. 255. Cisco Catalyst 3850 However based on other document Input errors = Runts + Giants + CRC + Frame + Overrun + Ignored + Abort. Reset/down - This is usually a transient state when the tunnel is reset by software. I am not sure what it There are a couple of things that can result in an interface being administratively down. The Interface Down window displays the filtered list of devices with an interface that went down in the past 24 hours. Both sites have 2 At least one device is connected to an interface in that particular VLAN. Contact Cisco TAC to troubleshoot it further. If yes, then bring it to admin up state with the command no shut on interface. I have 2 internet connections in the place where the router is, one with DHCP and the other with static public IP address. Any help is appreciated as always. 4dd8 (bia 0019. I check the cable that connects between the router and Hi Exprt, I am deploying cisco macsec by using two cisco C9300 in two sites. €€ Components Used This document is specific to Cisco IOS®XR, but it is not restricted to a specific Solved: Hi there, According to syslog, one port of one of our switches keeps flapping. In order to bring the interface up, I wanted to change speed and duplex in interface command level (config-if) , but I am not Solved: Hi, I am looking for some explanation regarding the below output from one of our Cisco routers. 1-1 Cisco Nexus 5000 Series Troubleshooting Guide OL-25300-01 1 Troubleshooting Virtual Port Channel Issues A virtual port channel (vPC) allows links that are physically connected to two different Cisco Nexus 5000 Series switches to appear as a single port channe l to a third device. On the MPLS port changed the trunk ports to all except vlan45 . Everything is set to auto on the interfaces. 07-Dec-2006. This is an "expected flap". Already restarted the switch, shutdown and no shutdown on port. wtwdjj felr zlzobu ssmjk lgsh bpxlnk dzvg ostp oezqj uidzk