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From: Acee Lindem (acee_at_REDBACK.COM)
Date: Tue Aug 06 2002 - 23:48:19 CDT
> Hi All
> I have one question about interfae MTU processing in DDP exchange.
> In my mind, I think any MTU mismatch between two neighbor can not
> exchange normally. So I think any router(OSPFv2 or OSPFv3) should
> not process the DDP with lower or higher MTU set. If anyone could help? Is it right??
If you look at section 10.6 in RFC 2328 you'll see that the OSPF
router with the lower MTU will reject the DB exchange packet. Hence,
you'll never get out of Exchange-start state.
Within the last 6 months, there was a long thread on this subject on
the list. However, at present, I can't get to the archives.
You can try http://discuss.microsoft.com/archives/ospf.html later.
> Best Regards,
> Network Testing Lab
> Institute of Computing Technology
> Chinese Academy of Sciences
> NO. 6, South Road, Kexueyuan, Zhongguancun
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