[c-nsp] OSPF's handling of secondary IP addresses on subinterfaces

[Robert Johnson]

Okay, I believe I've found my problem.

My primary address statement had a typo that put it outside of the
OSPF network definitions. Apparently when the primary address on an
interface isn't picked up by a particular OSPF process, none of the
associated secondary addresses will be either.

Will test to confirm tonight.


On Sun, Apr 8, 2012 at 12:10 AM, Robert Johnson <fasterfourier at gmail.com> wrote:
> Yes, I'm actually seeing one subinterface with a secondary address
> have both the primary and secondary address subnets advertised into
> OSPF and another have only the primary advertised. Very strange.
> Suppose it's worth trying redistribute connected... thanks for the
> tip.
>
> Is this expected behavior or a bug?
>
>
> On Sat, Apr 7, 2012 at 5:30 PM, Wayne Lee <linkconnect at googlemail.com> wrote:
>>
>>
>> Sent from my iPad
>>
>> On 7 Apr 2012, at 03:29, Robert Johnson <fasterfourier at gmail.com> wrote:
>>
>>> I have a FastEthernet interface with multiple 802.1Q based
>>> subinterfaces. OSPF properly advertises routes for the subnets
>>> directly defined on these subinterfaces. However if I add secondary IP
>>> addresses to these subinterfaces, the subnets defined using the
>>> secondary command show up in the local routing table as directly
>>> connected, but OSPF doesn't advertise them to the rest of the area.
>>> The OSPF process includes network statements that encompass both
>>> primary and secondary IP addresses and they're all in the same area.
>>>
>>> Are there any limitations I should know about with OSPF on
>>> subinterfaces with secondary IP addresses?
>>>
>>> IOS 12.4(25) on a 3745.
>>>
>>> Thanks in advance.
>>> _______________________________________________
>>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>>>
>>
>> I've seen this happen before. The same box announced the secondary subnet on one subinterface but did not on a another. We do have redist connected subnets enabled.
>>
>> Regards
>>
>> Wayne
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