RE: BGP - Tags

From: Luis Rueda (luis.rueda@comsat.com.co)
Date: Tue Oct 11 2005 - 12:47:30 GMT-3


Andrew,

Was this route redistributed to BGP on another PE ? Maybe from a
different protocol ?

Can you send a sh ip bgp 10.131.96.0 255.255.255.0 ?

Regards,

Luis Rueda
CCNP, CCIP

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Andrew Lissitz (alissitz)
Sent: Tuesday, October 11, 2005 9:01 AM
To: C&S GroupStudy; Cisco certification
Subject: BGP - Tags

Hello Folk,

In a lab I was doing I, there were multiple BGP AS#s. All the BGP
routers were speaking to each other. There were no problems with
routing or anything ... my question is related to some show commands I
saw. Here goes:

PE1#show ip route 10.131.96.0
Routing entry for 10.131.96.0/24
  Known via "bgp 100", distance 200, metric 0
  Tag 200, type internal
  Last update from 10.131.31.242 4d22h ago
  Routing Descriptor Blocks:
  * 10.131.31.242, from 10.131.31.255, 4d22h ago
      Route metric is 0, traffic share count is 1
      AS Hops 1, BGP network version 0
      Route tag 200

@ the bottom of this you will see the tag 200. This was learned from a
bgp AS # 200. There was no tagging set (please do not ask for configs)
... This is a MPLS lab / network ... I would not think that this would
make a difference ...

Is this normal... BGP 'auto tagging' of routes learned from different AS
numbers?

Kindest regards,

Andrew



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