From: mani poopal (mani_ccie@yahoo.com)
Date: Wed Dec 22 2004 - 16:59:17 GMT-3
Hi all,
In the thei ciscopress lab 3 bgp section, the author is asking to advertise same routes via ospf and bgp(loopbacks). The books debrief sections specifies that in the bgp configuration these networks must be specified as back door option to make IGP routes prefer over bgp routes. When this was configured, in the router, bgp table is showing r> networks(pls see the output), is it acceptable to have output like this or any other method to overcome this bgp table. Scott, Brian and others, pls have a look at the output and advise.
R4#show ip bgp<------------BEFORE BACKDOOR COMMAND--IS THIS OUTPUT NORMAL
BGP table version is 163, local router ID is 10.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 2.2.2.0/28 10.6.6.6 0 11 10 1 i
*> 3.3.3.0/28 10.6.6.6 0 11 10 1 i
*> 10.1.1.0/28 10.6.6.6 0 11 10 i
*> 10.4.4.0/28 0.0.0.0 0 32768 i
*> 10.5.5.0/28 10.6.6.6 0 11 i
*> 10.6.6.0/28 10.6.6.6 0 0 11 i
*> 10.7.7.0/28 10.6.6.6 0 11 i
*> 10.8.8.0/28 10.6.6.6 0 11 10 i
===============================================================
R4(config-router)#network 10.1.1.0 mask 255.255.255.240 backdoor
R4(config-router)#network 10.5.5.0 mask 255.255.255.240 backdoor
R4(config-router)#network 10.6.6.0 mask 255.255.255.240 backdoor
R4(config-router)#network 10.7.7.0 mask 255.255.255.240 backdoor
R4(config-router)#network 10.8.8.0 mask 255.255.255.240 backdoor
===============================================================
R4#show ip bgp<--------AFTER BACKDOOR COMMAND
BGP table version is 19, local router ID is 10.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 2.2.2.0/28 10.6.6.6 0 11 10 1 i
*> 3.3.3.0/28 10.6.6.6 0 11 10 1 i
r> 10.1.1.0/28 10.6.6.6 0 11 10 i
*> 10.4.4.0/28 0.0.0.0 0 32768 i
r> 10.5.5.0/28 10.6.6.6 0 11 i
r> 10.6.6.0/28 10.6.6.6 0 0 11 i
r> 10.7.7.0/28 10.6.6.6 0 11 i
r> 10.8.8.0/28 10.6.6.6 0 11 10 i
R4#show ip bgp rib-failure
Network Next Hop RIB-failure RIB-NH Matches
10.1.1.0/28 10.6.6.6 Higher admin distance No
10.5.5.0/28 10.6.6.6 Higher admin distance Yes
10.6.6.0/28 10.6.6.6 Higher admin distance Yes
10.7.7.0/28 10.6.6.6 Higher admin distance Yes
10.8.8.0/28 10.6.6.6 Higher admin distance Yes
thanks
Mani
B.ENG,A+,CCNA,CCNP,CCNP-VOICE, CSS1,CNA,MCSE
(416)431 9929
MANI_CCIE@YAHOO.COM
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