From: Ronnie Royston (RonnieR@xxxxxxxxxxxxxxxxx)
Date: Mon Dec 04 2000 - 20:28:30 GMT-3
In case anyone hasn't practiced this feature, ...I am currently using it in
a test environment as a means of bringing up BRI backup for a remote AS when
the frame link (47.255.255.4/30) goes down. No floating statics and no
backup interface commands! This could be a good trick to know...
router bgp 100
***text omitted***
neighbor 17.255.255.6 remote-as 300
neighbor 17.255.255.6 advertise-map ToL7 non-exist-map If_No_47
!
ip classless
access-list 10 permit 47.0.0.0 0.255.255.255
access-list 17 permit 17.0.0.0 0.255.255.255
access-list 101 permit ip any any
route-map If_No_47 permit 10
match ip address 10
!
route-map ToL7 permit 10
match ip address 101
*** With frame link administratively down ***
L7#sho ip bgp
BGP table version is 55, local router ID is 77.255.255.17
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
*> 11.0.0.0 17.255.255.5 0 0 100 ?
*> 14.0.0.0 17.255.255.5 0 0 100 ?
*> 17.0.0.0 0.0.0.0 0 32768 ?
*> 23.0.0.0 17.255.255.5 0 100 ?
*> 33.0.0.0 17.255.255.5 0 100 ?
*> 34.0.0.0 17.255.255.5 0 100 ?
*> 44.0.0.0 17.255.255.5 0 100 ?
*> 77.0.0.0 0.0.0.0 0 32768 ?
L7#conf t
Enter configuration commands, one per line. End with CNTL/Z.
L7(config)#int se0
L7(config-if)#no shut
****after about 60 seconds for reconvergence***
L7#sho ip bgp
BGP table version is 63, local router ID is 77.255.255.17
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
*> 11.0.0.0 47.255.255.5 0 100 ?
*> 14.0.0.0 47.255.255.5 0 0 100 ?
*> 17.0.0.0 0.0.0.0 0 32768 ?
*> 22.0.0.0 47.255.255.5 0 100 200 ?
*> 23.0.0.0 47.255.255.5 0 100 ?
*> 33.0.0.0 47.255.255.5 0 100 ?
*> 34.0.0.0 47.255.255.5 0 0 100 ?
*> 44.0.0.0 47.255.255.5 0 0 100 ?
*> 47.0.0.0 0.0.0.0 0 32768 ?
*> 77.0.0.0 0.0.0.0 0 32768 ?
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:25:58 GMT-3