[c-nsp] err-disable state on a cisco 3750 catalyst

[Hunter Fuller]

If you are running a LACP bundle, and the other end is not a Cisco
piece of gear, and the error only happens when more than one link is
up, then what is happening is, the far end is sending BPDUs on more
than one member of the LACP bundle. Cisco gear does not expect this
and will shut the entire Port-channel. To make it stop doing that, do
this in config mode:

no spanning-tree etherchannel guard misconfig

--
Hunter Fuller
Network Engineer
VBRH Annex B-1
+1 256 824 5331

Office of Information Technology
The University of Alabama in Huntsville
Systems and Infrastructure


On Tue, Jul 12, 2016 at 1:41 PM, Olivier CALVANO <o.calvano at gmail.com> wrote:
> Hi
>
> i have a big problems with one cisco 3750 :
>
>
> Jul 12 17:30:36.218: %PM-4-ERR_DISABLE: channel-misconfig error detected on
> Gi1/0/1, putting Gi1/0/1 in err-disable state
> Jul 12 17:30:36.856: %PM-4-ERR_DISABLE: channel-misconfig error detected on
> Po1, putting Gi1/0/1 in err-disable state
> Jul 12 17:30:36.856: %PM-4-ERR_DISABLE: channel-misconfig error detected on
> Po1, putting Po1 in err-disable state
>
>
> The port is in err-disable regularly .. a shut and no shut that's restart
>
>
>
> C3750#sh errdisable detect
> ErrDisable Reason      Detection    Mode
> -----------------      ---------    ----
> arp-inspection          Enabled      port
> bpduguard               Enabled      port
> channel-misconfig       Enabled      port
> community-limit         Enabled      port
> dhcp-rate-limit         Enabled      port
> dtp-flap                Enabled      port
> gbic-invalid            Disabled
> inline-power            Enabled      port
> invalid-policy          Enabled      port
> l2ptguard               Enabled      port
> link-flap               Enabled      port
> loopback                Enabled      port
> lsgroup                 Enabled      port
> mac-limit               Enabled      port
> pagp-flap               Enabled      port
> port-mode-failure       Enabled      port
> psecure-violation       Enabled      port/vlan
> security-violation      Enabled      port
> sfp-config-mismatch     Enabled      port
> small-frame             Enabled      port
> storm-control           Enabled      port
> udld                    Enabled      port
> vmps                    Enabled      port
>
>
> there is a solution to disable the errdisable on this type of switch?
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