From: Brian McGahan (brian@cyscoexpert.com)
Date: Thu Oct 17 2002 - 21:54:04 GMT-3
Richard,
The command is working correctly. The key point to keep in mind
is 'missing' MED. A MED of NULL and a MED of 0 are not the same. In
the case presented here, all MEDs that were missing received a value of
2^32, and everything else remained the same.
For more detail:
http://www.cisco.com/en/US/tech/tk648/tk365/technologies_tech_note09186a
0080094431.shtml
HTH
Brian McGahan, CCIE #8593
Director of Design and Implementation
brian@cyscoexpert.com
CyscoExpert Corporation
Internetwork Consulting & Training
Voice: 847.674.3392
Fax: 847.674.2625
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Richard Davidson
> Sent: Thursday, October 17, 2002 7:02 PM
> To: groupstudy
> Subject: bgp bestpath med missing-as-worst :-(
>
> I have had the worst time with this bgp bestpath med missing-as-worst
> command. It never seems to work right. As you can see I have the
command
> in the bgp config, but the bgp routing table does not make all of the
zero
> metrics 2^32 metrics. I got it to work using and inbound route map
with
> the metric to zero but no other time. Does this command just not work
> right in general. Does any one know any links or pages in books that
will
> help explain this?
>
> Rich
>
> ****
>
> #srb bgp
> router bgp 1
> bgp always-compare-med
> bgp bestpath med missing-as-worst
> bgp bestpath compare-routerid
> network 20.20.20.0 mask 255.255.255.0
> network 150.150.150.0 mask 255.255.255.0
> network 192.168.1.0
> network 192.168.2.0
> network 192.168.3.0
> network 192.168.4.0
> neighbor 150.150.150.2 remote-as 2
> neighbor 193.16.0.1 remote-as 2
>
> *********
>
> A#sib
> BGP table version is 26, local router ID is 192.168.4.1
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *> 0.0.0.0 193.16.0.1 30 0 2 ?
> * 150.150.150.2 4294967294 0 2 ?
> *> 6.6.6.0/24 193.16.0.1 0 0 2 i
> * 150.150.150.2 4294967294 0 2 i
> *> 20.20.20.0/24 0.0.0.0 0 32768 i
> *> 150.150.150.0/24 0.0.0.0 0 32768 i
> *> 172.16.0.0/30 150.150.150.2 0 0 2 i
> * 193.16.0.1 0 0 2 i
> *> 172.16.0.16/30 193.16.0.1 0 0 2 ?
> * 150.150.150.2 4294967294 0 2 ?
> *> 192.168.1.0 0.0.0.0 0 32768 i
> *> 192.168.2.0 0.0.0.0 0 32768 i
> *> 192.168.4.0 0.0.0.0 0 32768 i
> *> 193.16.0.0/30 193.16.0.1 0 0 2 ?
> * 150.150.150.2 4294967294 0 2 ?
> *> 193.16.1.0 193.16.0.1 30 0 2 ?
> * 150.150.150.2 4294967294 0 2 ?
> A#
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