From: Volkov, Dmitry (Toronto - BCE) (dmitry_volkov@xxxxxxxxx)
Date: Tue Aug 27 2002 - 11:31:02 GMT-3
Angelo,
What is about BGP Synch on R7 and R10 ?
You did not disable it ?
Dmitry
-----Original Message-----
From: Angelo De Guzman [mailto:ghie_pogi@yahoo.com]
Sent: Tuesday, August 27, 2002 8:23 AM
To: 'ccielab@groupstudy.com'
Subject: Page 376 of Internet Routing by Halabi
Hi to All,
R10 ------R7
| /
| /
| /
R5
R10 and R7 in AS 1.
R5 in AS 3
My objective is for R10 to prefer the path to R7
going into AS 5. I'm only allowed to change the metric
to make this work. The link between R5 and R10 will
only be used when R5 to R7 link fails.
Here's my Config.
R5
router BGP 3
network 172.16.220.0 mask 255.255.255.0
neighbor 172.16.20.1 remote-as 1
neighbor 172.16.20.1 route-map setmetric out
neighbor 192.68.6.2 remote-as 1
neighbor 192.68.6.2 route-map setmetric1 out
no auto-summary
route-map setmetric permit 10
set metric 100
route-map setmetric1 permit 10
set metric 50
These are the sh ip bgp for R7 and R10
R10#sh ip bgp
BGP table version is 3, local router ID is 192.68.11.1
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
*> 172.16.220.0/24 172.16.20.2 100 0 3 i
* i 192.68.6.1 50 100 0 3 i
*> 192.68.11.0 0.0.0.0 0 32768 i
R7#sh ip bgp
BGP table version is 7, local router ID is 192.68.9.2
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
* i172.16.220.0/24 172.16.20.2 100 100 0 3
i
*> 192.68.9.1 50 0 3
i
*>i192.68.11.0 192.68.6.2 0 100 0 i
Why does R10 still prefers the link between R10 and
R5. Eventhough the network 172.16.220.0/24 has a
metric of 100.
Thanks,
Angelo
This archive was generated by hypermail 2.1.4 : Sat Sep 07 2002 - 19:48:39 GMT-3