[c-nsp] IP MTU setting + OSPF

[Chris Wopat]

I'm changing MTU on some 7200s with PA-FE's to 1530 with the "mtu
1530" command on the interface. To get OSPF to neighbor with a 2800
(no user settable MTU), I've put "ip mtu 1500" on the 7200. In my
testing this works fine. Does this in any way prevent the 7200 from
generating an OSPF packet that's larger than 1500 and potentially
breaking things down the road? The following links have been helpful
for MTU descriptions but I'm not seeing the answer to this question in
there.

- http://puck.nether.net/pipermail/cisco-nsp/2006-June/031765.html

- http://puck.nether.net/pipermail/cisco-nsp/2008-April/049365.html

- http://www.cisco.com/en/US/tech/tk827/tk369/technologies_white_paper09186a00800d6979.shtml

- http://blog.ioshints.info/2007/10/tale-of-three-mtus.html

These MTU changes are being made as MPLS preparations.