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

[Rick Ernst]

OSPF debug (packet, event) showed no incoming OSPF packets.  The 2-3
neighbors that did come up on the 7500 were in FULL/DR, FULL/BDR, and
2WAY/DROTHER (from memory; I was more interested in getting the device up
rather than capturing details).

One thing I was thinking of was that the physical port was dropping incoming
multicast for some reason.

Rick


On Thu, Mar 4, 2010 at 10:48 AM, Ryan Lambert <thirdfrl.nsp at gmail.com>wrote:

> 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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>
>