12-02-2020 05:36 PM
I have a cisco Nexus 6001 Chassis and ethernet103/1/19 was in BPDU errdisable state. After resetting the port , it went into down(link not connected) state. Any help on how to bring the port up?
12-02-2020 05:49 PM
12-02-2020 05:58 PM
Update: The port again went into bpdguard errdisable state from link not connected state. Not sure what is causing this.
12-09-2020 05:24 AM
Hi Jasmine,
FEX ports are intended for servers/end hosts and not any switches. If the port is going into a BPDUGuard ErrDisable state, it means it is receiving BPDUs. You can verify via:
switch# show spanning-tree interface ethernet 103/1/19 detail | i i BPDU|VLAN
Ideally, you should see all the received counters at 0. If you'd like to reset the counters and shut/no shut the port again to confirm, you can clear them via `clear spanning-tree counters interface ethernet 103/1/19` then check the show command above again to see if it has received any BPDUs since the counters were cleared.
P.S: All FEX Host Interface (HIF) ports have BPDUGuard enabled by default. If you can guarantee that there's no loop being created by the switch that is connected to a HIF, then you can configure BPDUFilter to prevent the port from going err-disabled. Just keep in mind that is against Cisco's recommendation and general best practices.
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