Re: OSPF quiz

Carlos,

It could be interesting to compare this behavior to the way other protocol
treat 3rd party next-hops. Also, try figuring the process that OSPF uses
when picking up an FA for NSSA prefixes. A while ago I wrote a few summaries
on the 3rd party NHops processing in different routing protocols, hope it
might be helpful still:

http://blog.ine.com/2010/09/02/understanding-third-party-next-hop/
http://blog.ine.com/2009/11/13/ospf-prefix-filtering-using-forwarding-address/

Look into that NSSA FA selection process, it might be amusing :)

Regards,

-- 
Petr Lapukhov, petr_at_INE.com
CCIE #16379 (R&S/Security/SP/Voice)
CCDE #20100007
Internetwork Expert, Inc.
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2011/5/31 Carlos G Mendioroz <tron_at_huapi.ba.ar>
> Just wanted to share a small quiz. Try to answer w/o labbing this up.
>
> Topology: Central site with a firewall connected by a lan to two borders
> (B1 and B2) using HSRP for DG (FHRP). Borders run serial links to
> branches. OSPF single area in the WAN.
>
> B1 and B2 have a static route to an internal network X poining to the
> FW. B1 redidtributes X with metric 20 metric type 1. B2 does the same
> thing with metric 50.
>
> At a branch,, how many routes do you see, assuming same bandwidth on
> both serial links ?
>
> --
> Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
>
>
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