Cisco switch enable err disabled port



We can use 'shut' , 'no shut' and we can configure the switch to recover automatically. 79. Swtch1>show interface status Port Name Dec 6, 2018 at 9:37 AM. But the ports went down, and nobody realised it? You can avoid this problem with the setting. Port Security Network Security Cisco Switches Network Administration CCNA Certified A couple of ports on different Cisco 2960s, 2960x switches are constantly getting into err-disable mode which cased server outages. Aziz on October 8, 2007. The switches I have are Cisco 3560 catalyst. Another way you would do to see the reason would be to set the err-disable auto-recovery feature and In short, the simple solution is that just go in config-if mode and shutdown and then no shutdown these ports. Cisco-2960X#sh int status Port Name Status Vlan Duplex Speed Type Gi1/0/1 HP_C7K err-disabled 20 auto auto 10/100/1000BaseTX Gi1/0/2 HP_C7K connected 20 a-full a-1000 10/100/1000BaseTX Gi1/0/3 HP_C7K notconnect 20 auto auto 10/100/1000BaseTX Gi1/0/4 HP_C7K notconnect 20 auto auto 10/100/1000BaseTX Gi1/0/5 HP_C7K connected Port Name Status Reason Err-disabled Vlans Gi1/0/1 Downlink to Mall-U err-disabled gbic-invalid. The feature is called bpduguard and if you look at the logs in the switch it will show you why it err-disabled them. What I want is to push the traffic from this 'mirror port' into a RSPAN VLAN on the Cisco so I can sniff the traffic on the HP switch from elsewhere in my network. Switch# show errdisable recovery. The error-disable function let the switch to shut down a port when it encounters physical, driver or configuration problems. When I check the status on the port to see why Hi, on my switch I have one port in err-disabled status. Commands are as follows: errdisable detect cause command 2-140. i configured err-disabled recovery on the switch but the port still doesn't get back up. Cisco Switch Err-Disable problem. When a port is in error-disabled state, it will shut down and no traffic is sent or received on that port. Type in "config t" and press enter. With this setting, the switch brings up the port after 180 seconds. I am working with a Cisco WS-C2960S-48FPS-L. The prompt should now read (config-if)#. The switch will shut down the port under a number of abnormal conditions, like flapping. Symptom: Port goes into err-disabled state because of port-security security violations. The errDisable status feature is used by Cisco (and other switch How do you enable an err-disabled port automatically in your Cisco network? Cisco has a way to deal with such a disabled port. Our network environment is completely supported by Cisco switches from 2960, 4500, 3850 ,etc. >config t (get into configuration mode) 5. Get into the switch and "show log" and "show int status err-disabled" commands. errdisable recovery cause all errdisable recovery interval 180. If I restart the switch, would there be any risk of it not booting back up again? Is there anything I can do to make sure this doesn’t happen? Bin: c3750 advanced IP services k9-mz. Swtch1>show interface status Port Name But the ports went down, and nobody realised it? You can avoid this problem with the setting. Loc Dealing with an err-disabled port. e. Err-disabled though can be a bit baffling to a new network engineer. This happens due to "Total MAC address" learned is not synced across the stack members. Also the show interface shows "line protocol is down (err-disabled) "GigabitEthernet0/7 is down, line protocol is down (err-disabled) Hardware is Gigabit Ethernet, address is 001e. The status of the port is as follows GigabitEthernet1/0/18 is down, line protocol is down (err-disabled) Hardware is Gigabit Ethernet, address is 0014. Ideally, I'd like to see this as a single sensor per device, not per port Status. error conditions, displaying 2-469. Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch. To enable err-disabled ports on Cisco 3750 switch series. It has to be shut/no shut in order for it to be cleared. This will change the prompt to (config)#. Port Name Status Reason Err-disabled Vlans Gi1/0/1 Downlink to Mall-U err-disabled gbic-invalid. Any ideas? _____ SHOW RUN: version 12. Cisco Bug: CSCvu25820 - Opposite ports goes to err-disabled due to channel-misconfig in QinQ network I have a Cisco 3750 switch in production with uptime of almost 8 years. 2016-04-05 02:33 PM. errdisable recovery command 2-146. I replaced the patch cables in my IDF and left some spares for students to pick up and replace the patch in their room. If the errors are serious it can take the action to shut down the switch port until someone will manually enable it or until a Hello, we have upgraded an otherwise fully stable and working cluster from 7. loopback Disabled pagp-flap Disabled port-mode-failure Disabled pppoe-ia-rate-limit Disabled psecure-violation Disabled security-violation Disabled sfp-config-mismatch Disabled small-frame Disabled storm-control Disabled Type "en" or "enable" and put in the password again. He thinks it might be a faulty cable somewhere causing bpdu's to be reflected. Logon to the switch. I keep getting ports on several Cisco 2950 switches that will go into ERR-DIS mode and not come out. >enable (type enable at and the password to gain full access to the switch) 3. The most likely place to find this is in the output of show interfaces status. If it is set to "Access" mode you likely have it set up to BPDU-Guard. I would like a sensor that reports when a port goes to the err-disable state so I can quickly determine the root cause without digging through the logs of several dozen switches. Unlike Cisco IOS, you cannot enable/disable detection of specific events that can cause an errDisable eventall events supported are always enabled. Switch#show interfaces status err-disabled Port Name Status Reason Err-disabled Vlans Gi1/0/12 *** Connected To A err-disabled security-violation When the switch puts a port in the error-disabled state, the switch sends a message to the console that describes why it disabled the port. Specify the port you wish to change. It should tell you in the logs why the switch put them into the err-disabled . No terminal messages or anything. That err-Disable is usually an indicator that the port is plugged in to either the same switch or another switch, and it is preventing a loop. But you really have to figure out what caused the err-disable and fix that problem or it will happen again. The port LED is set to the orange color and, when you issue the show interfaces command, the port status shows as Errdisabled. ae87) To recover a port that is in an Errdisable state, manual intervention is required, and the administrator must access the switch and configure the specific port with ' shutdown ' followed by the ' no shutdown ' command. Automatically recover err-disabled ports. Yesterday, I found 3 FastEthernet port disabled on My Catalyst Express 500 (Port 20,23 & 24): And this is the screen shoot from the alert page: Result of running ’#show interface status’; 3 port status =’err-dissabled’. 2, we are facing switch port err-disable issue. VLAN Configuration; Port 23-24 on Default VLAN 1. For example, "int fa0/5" would specify port 5 on the switch. The example in this section provides two sample messages that show the The HP port I'm connecting to is described as a 'mirror port', which appears to be like a SPAN port except that it also allows ingress traffic. I am intermittently having ports shut down on switches throughout my company. Starting from a couple of months ago ,after Xen environment upgraded to 7. Here are my port configs - the same except description: interface GigabitEthernet1/0/1 We have a switch stack of Catalyst 3750's. This command sequence will enable the port again, however, if the problem persists Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch . --> Err-Disabled is a Cisco feature which informs the administrator there is some problem in the interface or port. 3 of the ports were err-disabled. If you've spent any amount of time in Cisco networking with Catalyst switches, you've probably run across a port that is in err-disabled state. Enter in the following commands: Hello, we have upgraded an otherwise fully stable and working cluster from 7. Make sure logging is enabled and try to recreate the issue, then check the logs. spanning-tree bpduguard enable. Cisco switches have a feature built-in so ports in an err-disabled state automatically reset themselves saving you the time of having to connect to the switch and manually shut and no shut these interfaces. I've seen this occur when you plug a trunk link into an access port and when spanning-tree detects a non-root switch trying to become the root bridge when root guard is enabled. If I shut and then no shut the port, it clears it and then sets the err-disabled again right away. . --> When the port goes Err-Disabled State the port simply goes to shutdown state. It can be configured to automatically try to bring the ports back up after a period of time. VLAN Configuration; Port 23-24 on Default VLAN In short, the simple solution is that just go in config-if mode and shutdown and then no shutdown these ports. Execute below command to display disabled ports on Cisco switch. 0 to 7. It seems to be random. 2. errdisable recovery cause small-frame 2-145. Step-2: Auto-Recovery. telnet 10. 89 from random workstations at 13:14:34 and that is causing port to go into err-disable. errdisable detect cause small-frame comand 2-143. A port being error-disabled is not by itself a cause for alarm, but for a reason of a problem that must be resolved. 0912) Description: Standard voice and data ports Hi Amjad, There are a few reasons because of which a port would be placed in err-disabled. c107 (bia 001b. Hi Amjad, There are a few reasons because of which a port would be placed in err-disabled. Another way you would do to see the reason would be to set the err-disable auto-recovery feature and The problem is that Cisco switches send out a packet for loopback detection that if they receive back on a port they will automatically put the port in an err-disabled state. Swtch1>show interface status Port Name 01-06-2009 05:35 PM. Layer2 Technologies 1. 1. When a port is error disabled, it is effectively shut down and no traffic is sent or received on that port. Administratively disabled means that the port is configured to be shutdown by the administrator using the CLI. In the instance identified the switch was a 9710 @ 6. Is there any command in cisco switch that will automatically turn on ports that are shut down due to flapping if the port is disconnected and reconnected? Or do we have any command to tell the router the ignore the flapping connection? At the moment, the switch disable the port. Then to get the ports back enter configuration mode, then "int g0/4" or whatever port and then "shut" and then "no shut" How do you enable an err-disabled port automatically in your Cisco network? Cisco has a way to deal with such a disabled port. As far as I see there are many ARP requests for 151. Port Name Status Reason Err-disabled Vlans. As already mentioned, assuming you have logging enabled on the switch, you would check the logs out and see why that port has been placed in err-disabled. To view Disabled Ports: show interfaces status err-disabled. x CISCO-ERR-DISABLE-MIB::cErrDisableIfStatusCause. I can bring the port up by doing the shutdown no shutdown command on the interface. loopback Disabled pagp-flap Disabled port-mode-failure Disabled pppoe-ia-rate-limit Disabled psecure-violation Disabled security-violation Disabled sfp-config-mismatch Disabled small-frame Disabled storm-control Disabled On CatOS, a similar recovery timer exists which determines the amount of time the switch should wait before re-enabling an errDisabled port. I haven't configured portsecurity at all, so I think the reason is one of: #show errdisable detect. switch#show interfaces status err-disabled Port Name Status Reason Gi1/0/1 SERVER01 err-disabled psecure-violation Gi1/0/46 err-disabled psecure-violation Gi2/0/12 err-disabled psecure-violation . 1. mib on zabbix and I'm able to chec the err-disabled pors with snmpwalk: #snmpwalk -v 2c -c public 172. show interfaces status err-disabled to show currently enabled port-security for Cisco switches. I configured the CISCO-ERR-DISABLE-MIB. Here are my port configs - the same except description: interface GigabitEthernet1/0/1 Type "en" or "enable" and put in the password again. Conditions: Insert an unsupported GBIC (such as GLC-T) into the fiber port of the gig1 or gig2. Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch and is supported on most Catalyst switches running the Cisco IOS software. 1 no service pad service timestamps debug uptime service timestamps log datetime localtime no service password i have a port that keeps going into err-disabled mode and shutdown. Each port is directly connected to a computer running Windows XP. A port on a Cisco switch may be put into an err-disabled state, which will drop any connections through the switch that are using that port. ae87 (bia 001e. Router(config)#service internal Router(config)#no errdisable detect cause gbic-invalid Router(config)#service unsupported-transceiver In order to avoid this situation we can enable the auto-recovery mechanism for a secure port in err-disabled state. Then to get the ports back enter configuration mode, then "int g0/4" or whatever port and then "shut" and then "no shut" Product and Software: This article applies to all Aruba APs and ArubaOS versions. Following is an example of what an error-disabled port looks like: 2960G# show interface gigabit0/7 GigabitEthernet0/7 is down, line protocol is down (err-disabled) Hardware is Gigabit Ethernet, address is 001b. g: NOC_SWITCH> show int status err-disabled Recovery Process: Step-1: Manual. You can also set an automatic recovery on a switch-port with the following commands: TestSwitch(config)#errdisable recovery cause psecure-violation TestSwitch(config)#interface g0/1 Cisco Switch Err-Disable problem. Red Flag This Post. c107) MTU 1500 bytes, BW Automatically recover err-disabled ports. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students 2016-04-05 02:33 PM. ErrDisable Reason Timer Status. Cisco Bug: CSCvu25820 - Opposite ports goes to err-disabled due to channel-misconfig in QinQ network Link Flapping (up/down) Port Security Violation; Unicast Flodding; UDLD Failure; Broadcast Storms; BPDU Guard; hows as Errdisabled. A couple of ports on different Cisco 2960s, 2960x switches are constantly […] 1. A couple of ports on different Cisco 2960s, 2960x switches are constantly […] loopback Disabled pagp-flap Disabled port-mode-failure Disabled pppoe-ia-rate-limit Disabled psecure-violation Disabled security-violation Disabled sfp-config-mismatch Disabled small-frame Disabled storm-control Disabled The feature is called bpduguard and if you look at the logs in the switch it will show you why it err-disabled them. Follow the below . 0. My goal is to allow traffic from the 2960 to pass over a trunk port (wan) on the 3650 to another location, however the 2960 is immediately going into err-disabled (bpuguard) when it is connected. To recover a port that is in an Errdisable state, manual intervention is required, and the administrator must access the switch and configure the specific port with 'shutdown' followed by the 'no shutdown' command. Do a show interface status and see if the ports say err-disabled , if so then just "shut, then no shut as previously indicated. Then to get the ports back enter configuration mode, then "int g0/4" or whatever port and then "shut" and then "no shut" . The 3650 never sees the connection. Well, no luck with TAC (so far). c Troubleshoot Err-disable recovery: Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch. Cisco Switches Err-disabled Port State, Enable & Disable Autorecovery Feature. In one instance, we had a single hba attached host that experienced downtime. Please let us know here why this post is inappropriate. >interface FastEthernet 0/1 (Get to configuration for one of the bad ports. 121. 2, that's when we started noticing that our Cisco 3850 switch ports started to shutdown, in our particular case only management ports shutdown at random, and on the switch they are marked as down/down (err-disabled). The port goes err-disabled. After some research I determined that Cisco automatically disables non cisco branded SFPs. the port will come up and be working well. If it is fixed, the port comes up again. You will probably find the err-disable entry. Err-disabled stat on cisco switch port. The example in this section provides two sample messages that show the reason for port disablement: One disablement is because of the PortFast BPDU guard feature. 11c and the line card in question was a DS-X9448-768K9 (2/4/8/10/16 Gbps Advanced FC Module) At this moment I'm trying to check the status of the err-disabled ports of some Cisco catalyst 2960 switches. but we suggest you read the Cisco concept why ports go on error-disable mode. Re: N300 WNR2000v5 causes Cisco switch to err-disable port. Port configuration is standard for all access ports: The feature is called bpduguard and if you look at the logs in the switch it will show you why it err-disabled them. 54aa. I was able to re-enable the port and have it come back online - and I subsequently replaced the gbic. --> This Err-Disabled State may occur due to so many reasons like. When the switch puts a port in the error−disabled state, the switch sends a message to the console that describes why it disabled the port. add-sensor cisco-switch prtg-kbtracker To recover a port that is in an Errdisable state, manual intervention is required, and the administrator must access the switch and configure the specific port with ' shutdown ' followed by the ' no shutdown ' command. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students After some research I determined that Cisco automatically disables non cisco branded SFPs. Having problems with gig ports on my 2950T 48port switches going into error-disabled state? the port is configured as an trunk port. Take a look at your log (show log) and see if you can find log entries related to this port. Up and down are fairly self explanatory. When I check the port it is in an err-disable state. Fix the loop then disable/enable the port. ErrDisable Reason Detection Mode I have a Cisco Catalyst 3750G Switch and apparently I have done something worng and disabled one port. 1 (change the ip as required,) Enter Password to continue. Here is the output: Port Name Status Reason Fa2/0/41 err-disabled loopback Fa3/0/33 err-disabled loopback Fa3/0/41 err-disabled loopback What is Err-Disabled Port ? September 09, 2016 Troubleshooting No comments. It has been happened to both bonded ports and access ports which has no nic teaming or bonding. In short, the simple solution is that just go in config-if mode and shutdown and then no shutdown these ports. com To enable err-disabled ports on Cisco 3750 switch series. I did a show interface status err-disabled. 2. Only two parameters need to be considered when configuring this feature. Te1/1/1 Up-link to JAWANET err-disabled loopback. 1 Configure and verify switch administration. Including all the following models: Cisco Switches Err-disabled Port State, Enable & Disable Autorecovery Feature Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch and is supported on most Catalyst switches running the Cisco IOS software. They will tell you why it disabled the port. If the problem still exists, the port goes into err-disable again. For this use the following global configuration commands: SW01(config)# errdisable recovery cause psecure-violation A couple of ports on different Cisco 2960s, 2960x switches are constantly getting into err-disable mode which cased server outages. In order to prevent them from defaulting to err-disable I had to enter the following commands in config mode. Te1/1/3 Up-link to JAWANET err-disabled loopback . Recovering err-disabled ports on Cisco Catalysts IOS platforms By default, Catalyst switches detect errors that occur on switch ports. First make telnet connection with the switch. When a port is in error-disabled state, it is effectively shut down and no traffic is sent or received on that port. Dealing with an err-disabled port. Enter in the following commands: Our network environment is completely supported by Cisco switches from 2960, 4500, 3850 ,etc. Open. 79bb. Cisco 3850 Switch has err-disabled with reason loopback with two uplinks : facility-l3-sw#show interfaces status err-disabled. x. Symptom: ===== When UDLD is enabled on a 3750 switchport and the switchport native VLAN is not configured as a VLAN on the switch, UDLD will put the port into err-disabled The following is shown in the log Sep 7 13:54:43: %UDLD-4-UDLD_PORT_DISABLED: UDLD disabled interface Gi1/0/15, unidirectional link detected Sep 7 13:54:43: %PM-4-ERR_DISABLE =====Verify port status: show int status show interfaces Gi1/0/1 status. After logging into the switch you can see if a port is in the err-disabled state by issuing the show interface status command. Then to get the ports back enter configuration mode, then "int g0/4" or whatever port and then "shut" and then "no shut" Posted in Cisco IOS, errdisable recovery, port-security | Tags: cisco port-security, err-disable auto recovery, port-security on shared hub, port-security with multiple MAC, switch port-security « spanning-tree portfast default and spanning-tree portfast bpduguard default When the switch puts a port in the error-disabled state, the switch sends a message to the console that describes why it disabled the port. I have to log on to it and run shut and no shut. Acceptance criteria. Posted by S. Recommendation: Replace physical connector or upgrade drivers on switch port or try replacing cable and enable port again. Conditions: configure "switchport port-security maximum <num>" on an interface on a stack member and send traffic from the device connected to it. the link is mention below. g: NOC_SWITCH>show int status err-disabled Err-disabled Port State, Enable & Disable Autorecovery Feature. There are four primary states for interfaces on Cisco switches: up, down, administratively disabled and err-disabled. Thanks . below is a log results and err-disabled configuration The feature is called bpduguard and if you look at the logs in the switch it will show you why it err-disabled them. facility-l3-sw# I did a research and saw the link below: To verify, run the commands “show interface status err-disabled” or “show interface g0/1” Recovering from error-disabled stated. >show interfaces status err-disabled (This will show any ports that are disabled) 4. 0912 (bia 0014. 1c64. Router(config)#service internal Router(config)#no errdisable detect cause gbic-invalid Router(config)#service unsupported-transceiver Symptom: A gig port on the switch is err-disabled due to unsupported GBIC, but when an RJ45 cable is plugged in to the same port, the other end of the link goes up/up. Virtual environment is using Citrix Xen and Vmware products. The error disabled feature is supported on most Catalyst switches running the Cisco IOS software. Type "en" or "enable" and put in the password again. more details of the commands link: See full list on cisco. Enter in the following commands: we have experienced two issues where the cisco san os disabled a port on one of our 9513 directors due to a BitErrThreshold level.