From: Yifan (Eric) Wang (yifwang@xxxxxxxxx)
Date: Mon Aug 28 2000 - 12:58:46 GMT-3
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
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