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3 lis 2023 · Move the cable to a known good port to troubleshoot a suspect port or module. Use th show interface command for Cisco IOS to look for errdisable, disable or shutdown status. The show module command can indicate faulty, which can indicate a hardware problem. See the Common Port and Interface Problems section of this document for more information.
19 sie 2024 · To recover the interface from errdisable state, reenable the port with the command errdisable recovery cause l2ptguard. This command is used to configure the recovery mechanism from a Layer 2 maximum rate error so that the interface can be brought out of the disabled state and allowed to try again.
22 cze 2009 · You can issue the "errdisable recovery cause" command to configure and see a list of switch port errors that the switch can automatically recovery from. In the below example setting Errdisable autorecovery for BPDU GUARD.
6 wrz 2024 · Switchport Mode Access Troubleshoot Issues. 1. Mismatched VLANs. Symptom: Devices connected to the switchport can’t communicate with others on the network. Cause: The VLAN assigned to the switchport is incorrect or doesn’t match the VLAN used by the devices it’s trying to communicate with. Solution:
10 lut 2009 · Make sure your access switch revision number is lower than the distribution switch before you make this change if they are in the same vtp domain (If you don't you can wipe out your entire vlan on your network).
13 mar 2024 · The cause for the link flaps can be intermittent or permanent. Since link flaps tends to be a physical interference, this document explains the steps to diagnose, collect useful logs and troubleshoot problems that can occur with port flaps on Catalyst 9000 switches.
If line status is down, it could be that wrong cable is used, no cable inserted, bad cable inserted, port security feature disabled the interface, or it could be interface of other end of the cable is disabled by any reason.
