[j-nsp] OSPF Configuration Changes

[Matthew Walster]

2009/9/28 Hoogen <hoogen82 at gmail.com>

> OSPF works the same in Juniper or Cisco world. But considering 8 routers it
> wouldn't affect a lot. But do make a topology diagram to just check the
> links and the cost that might be associated after the change.
> That would actually be type 10. There would be a small flood of these LSA
> to even those routers that do not understand this. But is should be okay.
>
> -Hoogen
>

Thanks - it's an all-Juniper routing scenario.

I ask because I tried implementing this last weekend (literally just turning
on traffic-engineering and reference-bandwidth 10g) and for 20 minutes I got
the same routes to routers (as expected) but there was heavy packet loss to
certain destinations.

I was just wondering whether there is a step I missed out, if I had to clear
OSPF databases etc.

What seemed to happen was that during this extended period (minutes, not
seconds) the path A-B-C-D wasn't being followed, and the traffic was leaving
our network onto a lower local-preference BGP peer on router C.

I'll do some further investigation in the lab and work it out. Just wondered
if there was something I was missing - setting reference-bandwidth seemed to
work fine, it was adding traffic-engineering at the same time that seemed to
have played havoc with something.

Thanks for the response anyway,

Matthew Walster