[c-nsp] Odd behavior: OSPF on a physical port of an SVI

[Ryan Lambert]

Hi Rick,

Was wondering if you did any ospf debugs (adj, packet)? Did it show anything
interesting?

Any output on the 7500 with sh ip ospf nei? How about the ones you say see
it? What state is the relationship?

On Thu, Mar 4, 2010 at 1:25 PM, Rick Ernst <cnsp at shreddedmail.com> wrote:

> I can't even think of what the magic google/cco-fu would be to look for
> this.
>
>
> 7609-S with Sup720-3BXL running 12.2(18)SXF16 with a WS-X6516-GE-TX.
>
>
> All ports on the 6516 are configured in the same VLAN (using "interface
> range...") as access ports:
> ---
>  switchport
>  switchport access vlan 3
>  switchport mode access
>  no ip address
> ---
> interface Vlan3
>  ip address X.Y.Z.5 255.255.255.0
>  ip flow ingress
>  ip ospf authentication
>  ip ospf authentication-key 7 <KEY>
>  ip ospf priority 0
>  hold-queue 1000 in
> ---
>
> A 7500 attached to one port (jack 6) will only form OSPF associations with
> 1-3 neighbors (out of about 30).  To add to the joy, the other devices see
> the 7500 as a neighbor.  If I move another 7500 onto the port, it has the
> same behavior.  The original 7500 on another port works fine. ARP and basic
> IP (ping) work regardless of port.
>
> My immediate reaction is a bad port on the blade, but a) IP passes, and b)
> "it's just a 16 port switch"; the brains are on the SVI.
>
>
> Any clues for additional troubleshooting?
>
> Thanks,
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