From: Todd Carswell (acarswell@xxxxxxxxx)
Date: Wed Jun 19 2002 - 16:31:04 GMT-3
Hunt,
To get rid of the /32 host address, you need to enter the following
command under the loopback interface on RTC:
"ip ospf network point-to-point"
Loopback addresses that are advertised into OSPF get entered as host
addresses unless you specify the network type as p2p.
Todd Carswell
Hunt Lee wrote:
>This might be a simple answer. I have 3 routers:-
>
>RTA --- RTB --- RTC - 205.40.30.131 /26
>
>RTA & RTB - running EBGP
>RTB & RTC - running OSPF
>
>The network 205.40.30.131 is the IP of a Loopback interface, and it is
>advertised by OSPF's network command.
>
>OSPF is being redistributed into BGP at RTB.
>
>
>At RTC:-
>
>interface Loopback0
> ip address 205.40.30.131 255.255.255.192
>
>router ospf 30
> log-adjacency-changes
> network 10.0.0.0 0.255.255.255 area 0
> network 205.0.0.0 0.255.255.255 area 51
>
>
>Ok, here is what I'm confused about. At RTB, why is the BGP route for
>205.40.30.131 is a /32 (host route??) rather than a /26, or am I missing
>something important here??
>
>
>RouterB#sh ip bgp
>BGP table version is 4, local router ID is 172.17.1.1
>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
>*> 10.1.1.0/30 0.0.0.0 0 32768 ?
>*> 198.8.4.128/25 0.0.0.0 10 32768 ?
>*> 205.40.30.131/32 10.1.1.2 5 32768 ?
>
>
>RouterA>sh ip bgp
>BGP table version is 4, local router ID is 172.17.1.2
>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
>*> 10.1.1.0/30 172.17.1.1 0 0 2 ?
>*> 198.8.4.128/25 172.17.1.1 10 0 2 ?
>*> 205.40.30.131/32 172.17.1.1 5 0 2 ?
>RouterA>
>
>
>Thanks for your help.
>
>H.
>
>
>http://www.sold.com.au - SOLD.com.au
>- Find yourself a bargain!
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