From: Nick Shah (nshah@xxxxxxxxxxxxxx)
Date: Fri Jun 14 2002 - 08:31:38 GMT-3
Hung,
There was a discussion about this behaviour in the last 4-5 days, good
explanation by Carlos & other people.
Basically, on one router (say RtrA) if you redistribute protocol A into
protocol B & then redistribute protocol B into prot. C, then routes of prot.
A wont appear in prot. C.
You have to explicitly redistribute prot. A into prot. C. Note this
behaviour is only if you are doing this on *one router*.
hth
Nick
----- Original Message -----
From: Hung, Sing-Yu <Sing-Yu.Hung@pccw.com>
To: <ccielab@groupstudy.com>
Sent: Friday, June 14, 2002 7:54 PM
Subject: BGP route
> Dear,
>
> R6-----12.2.0.0/16--------r8
>
> r6 and r8 in bgp as 3
> R8 have Loopback1 177.1.1.1/24 and it is in RIP and redistribute into ospf
> then bgp, it is in ospf but not install in bgp.
> The question is why 177.1.1.1/24 in ospf but not in bgp?
>
> r6#sho ip r
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> default
> U - per-user static route, o - ODR
> T - traffic engineered route
>
> Gateway of last resort is not set
>
> B 4.0.0.0/8 [20/0] via 11.1.1.5, 19:02:14
> 177.1.0.0/24 is subnetted, 1 subnets
> O E2 177.1.1.0 [110/800] via 12.2.1.2, 00:38:03, Serial0
> B 41.0.0.0/8 [20/0] via 11.1.1.5, 20:04:06
> 11.0.0.0/16 is subnetted, 1 subnets
> C 11.1.0.0 is directly connected, Ethernet0
> 12.0.0.0/16 is subnetted, 2 subnets
> C 12.2.0.0 is directly connected, Serial0
> O 12.3.0.0 [110/60] via 12.2.1.2, 00:38:03, Serial0
> r6#sho proto
> Global values:
> Internet Protocol routing is enabled
> Ethernet0 is up, line protocol is up
> Internet address is 11.1.1.6/16
> Serial0 is up, line protocol is up
> Internet address is 12.2.1.1/16
> Serial1 is administratively down, line protocol is down
>
> r8#bgp
> BGP table version is 6, local router ID is 177.1.1.1
> 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
> *>i4.0.0.0 12.2.1.1 100 0 2 1 ?
> *> 12.2.0.0/16 0.0.0.0 0 32768 ?
> *> 12.3.0.0/16 0.0.0.0 0 32768 ?
> *>i41.0.0.0 12.2.1.1 100 0 2 1 ?
> r8#sho proto
> Global values:
> Internet Protocol routing is enabled
> Ethernet0 is up, line protocol is up
> Internet address is 12.3.1.1/16
> Loopback0 is up, line protocol is up
> Internet address is 12.4.1.1/16
> Loopback1 is up, line protocol is up
> Internet address is 177.1.1.1/24
> Serial0 is up, line protocol is up
> Internet address is 12.2.1.2/16
> Serial1 is administratively down, line protocol is down
>
> r8 config:
> router ospf 200
> redistribute rip metric 800 subnets
> network 12.2.0.0 0.0.255.255 area 0
> network 12.3.0.0 0.0.255.255 area 0
> area 0 authentication message-digest
> log-adjacency-changes
> !
> router rip
> network 177.1.0.0
> !
> router bgp 3
> no synchronization
> redistribute ospf 200 match internal external 1 external 2
> neighbor 12.2.1.1 remote-as 3
> neighbor 12.2.1.1 password ccie-2002
> no auto-summary
> !
> r8#ospf da
>
> OSPF Router with ID (177.1.1.1) (Process ID 200)
>
>
> Router Link States (Area 0)
>
> Link ID ADV Router Age Seq# Checksum Link count
> 12.2.1.1 12.2.1.1 297 0x8000002D 0xB3ED 2
> 177.1.1.1 177.1.1.1 320 0x80000028 0x7BA2 3
>
> Type-5 AS External Link States
>
> Link ID ADV Router Age Seq# Checksum Tag
> 177.1.1.0 177.1.1.1 320 0x80000028 0xBB46 0
>
>
>
>
> Bradford Hung
>
> Pacific Century CyberWorks
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