From: Billeyer (beyer@optonline.net)
Date: Tue Nov 21 2006 - 21:47:00 ART
Marvin Greenlee wrote:
> What does "debug ip ospf adj" tell you? I would lean
> toward it being a subnet mask mismatch rather than a
> MTU issue.
>
> How are you handing out the IP address? Via
> negotiation, or via DHCP?
>
> Just using a 'peer default ip address' and a pool, you
> will probably have a mismatch, as the other side sees
> a /32 and the debug will give you an error about not
> being on a common subnet. I was able to get an OSPF
> adjacency up using a tunnel in this case.
>
> Using DHCP, you can specify a mask to give the client,
> and OSPF will be happy.
>
> You may also be able to pass a mask to the neighbor
> with the 'ppp ipcp mask x.x.x.x' command, but I
> haven't labbed that method up to verify.
>
>
>
>
> --- Mike Dongvillo <dongvillo@yahoo.com> wrote:
>
>
>> Does anyone have a full working configuration for
>> running OSPF over PPPoE?
>>
>> I don't mean PPPoEoA, this is simply PPPoE with
>> one router as the dial-in server and one as the
>> dial-in client.
>>
>> I can get all the dial-in pieces to work, but not
>> the OSPF component.
>>
>>
>> Thanks
>> MD
>>
>>
>>
>>
>>
>>
>>
> --------------------------------------------------------------------------------------------------
>
>> Mike Dongvillo, CCIE #8187 (R&S, Security)
>> CCSP, CIPT-DS/OS/SS, CWLAN-DS/SS
>>
>> Mobile: (312) 925 - 0296
>>
>>
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>
>>
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I don't have an active configuration right at the moment, I have lot's
of experience with ospf and mtu. We run ospf over gre and IPSEC in my
wan design at work. If the MTU of the physical interface is smaller
than OSPF thinks it will, you get stuck in two-way. Setting the MTU of
the interface fixes this. For a plain PPPoE connection, you set the MTU
on the virtual interface. I seem to recall PPPoE being 8 bytes, but you
can set it smaller without any serious problems.
This archive was generated by hypermail 2.1.4 : Fri Dec 01 2006 - 08:05:48 ART