From: mac ccie (mac2008.ccie@gmail.com)
Date: Tue May 06 2008 - 05:24:52 ART
I have been using IE labs and most of the times I have seen similar approach
for dealing with redistribution problems arising due to redistributing EIGRP
external routes in OSPF at two points.
Their solution on most of the ocassions follow changing ospf external
distance to 171 so that eigrp external is preferred and then changing ospf
external prefixes AD(which is 171 now) to revert back to 110 using access
lists.
According to me a more simpler approach could be to just change the ospf
distance directly for EIGRP external routes to 171 so that routers where we
are doing redistribution prefers EIGRP external (170) over ospf.
Why would we do this an introduce an extra configuration step?
1: Change ospf external to 171 so that say R1 and R2 prefer EIGRP for eigrp
externals.
2: Change original ospf external AD back to 110.
Instead of this
Just change ospf distance original EIGRP external prefixes to 171. distance
ospf 171 0.0.0.0 255.255.255.255 ACL so that R1 and R2 prefer EIGRP for
EIGRP external routes ans ospf for original ospf external routes.
I know there could be multiple solutions to such problem but I just want to
make sure that I am not missing any possible problem arising because of
using second solution.
Any suggestions ?
Thanks,
Mac
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