[c-nsp] spanning-tree P2P self-looped

[Arie Vayner]

Mohammad, what's on the other end of gig4/19?
Could it be some WAN circuit and someone forgot to remove the loop test?

On Mon, Dec 14, 2015, 17:37 Mohammad Khalil <eng_mssk at hotmail.com> wrote:

> Hi All
> I have 7606 with ES20+ module
> I have two active connections on this module , one is layer 3 (point to
> point) link and the other one is the link of concern
> I have configured this link as a trunk with only Vlan 1700 is allowed ,
> and SVI is configured for that Vlan
> interface G4/19
> switchport
> switchport mode trunk
> switchport trunk allowed vlan 1700
> speed nonegotiate
>
> interface vlan 1700
> ip address x.x.x.x x.x.x.x
>
> What am facing now when I check the show spanning-tree blocked-ports I can
> see that port is blocked for Vlan 1700
> When I issue the show spanning-tree interface g4/19 details , I can see
> the counter for both sent and received increases equally (which explains
> the self-looped)
> When I change to switchport mode access , I can see the port is Up and the
> SVI is UP
>
> What could be the issue and how can I solve it from my side?
>
> Thanks in advance
>
> BR,
> Mohammad
>
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