From: Christopher Van Heuveln (cvanheuv@xxxxxxxxx)
Date: Mon Aug 28 2000 - 13:47:49 GMT-3
summary-address for external (on ASBR)
area __ range for internal (on ABR)
On Mon, Aug 28, 2000 at 11:58:46AM -0400, Yifan (Eric) Wang wrote:
> I have to draw a conclusion after I tried the following lab. Summary-address
> in ospf can only summarize "external routes" at ASBR. In other words, it
> applies to routes from other routing protocols, redistributed connected, and
> redistributed static routes, but NOT on internally learned OSPF routes.
>
> Pls review !
>
> I have:
>
> other ospf routers --- area 5 --- RouterF --- 132.3.10.0/24 (RIP) ---
> Gateway
>
> RouterF is connected to other ospf routers and it tries to summarize three
> IA OSPF routes learned from other ospf routers when redistributing OSPF into
> RIP router Gateway:
>
> 132.3.3.32/30 , 132.3.3.17/32 and 132.3.3.1/32
>
> into 132.3.3.0/24
>
> RouterF#sh ip rou ospf
>
> 132.3.0.0/16 is variably subnetted, 10 subnets, 4 masks
>
> O 132.3.5.1/32 [110/26] via 132.3.5.17, 00:09:18, TokenRing0
>
> O IA 132.3.3.1/32 [110/90] via 132.3.5.17, 00:07:13, TokenRing0
>
> O IA 132.3.3.17/32 [110/154] via 132.3.5.17, 00:07:13, TokenRing0
>
> O IA 132.3.3.32/30 [110/153] via 132.3.5.17, 00:07:13, TokenRing0
>
>
>
> interface Serial0
>
> ip address 132.3.10.2 255.255.255.0
>
> no ip mroute-cache
>
> clockrate 500000
>
> router ospf 1
>
> summary-address 132.3.3.0 255.255.255.0
>
> network 132.3.5.16 0.0.0.7 area 5
>
>
>
> router rip
>
> redistribute ospf 1
>
> passive-interface Loopback0
>
> network 132.3.0.0
>
> default-metric 4
>
>
>
>
> However, RIP router Gateway can NOT receive 132.3.3.0/24
>
> Gateway#sh ip rou rip
>
> 132.3.0.0/16 is variably subnetted, 6 subnets, 2 masks
>
> R 132.3.5.1/32 [120/4] via 132.3.10.2, 00:00:07, Serial0
>
> R 132.3.3.1/32 [120/4] via 132.3.10.2, 00:00:07, Serial0
>
> R 132.3.3.17/32 [120/4] via 132.3.10.2, 00:00:07, Serial0
>
>
>
> interface Serial0
>
> ip address 132.3.10.1 255.255.255.0
>
> !
>
> router rip
>
> network 132.3.0.0
>
>
>
> --------------------------
> Yifan (Eric) Wang
> --------------------------
>
>
-- Chris Van Heuveln Cisco Systems email: cvanheuv@cisco.com RTP TAC : : or: cvh@cisco.com ----------------- ..:::...:::.. -------------------------
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:24:31 GMT-3