From: Hunt Lee (huntl@webcentral.com.au)
Date: Fri Dec 20 2002 - 00:39:44 GMT-3
Guys,
I'm sure this question has been asked many times before, but can someone
kindly explain to me again? There are some /25 routes & /29 routes in EIGRP
that I need to redistribute into RIP v1. The serial frame relay link that
connects R1 with R4 has a /24 mask, and so as the Ethernet link that
connects R4 & R5. How can I inject /25 & /29 EIGRP routes into a classful
routing domain in a case such as this?
172.16.5.1 /25
---------------
|
R1
/ | \
/ | \
R2 R3 R4 --- R5
The entire Hub & Spoke network is EIGRP only, except R4 which is running
both EIGRP & RIPv1 (& mutual redistribution between the 2 protocols), & R5
is running RIPv1 only.
R1's Multipoint interface to R2 & 3 - 192.168.1.1 /29
R1's P-2-P interface to R4 - 192.168.2.1 /24
R2's FR interface - 192.168.1.2 /29
R3's FR interface - 192.168.1.3 /29
R4's FR interface to R1 - 192.168.2.2 /24
R4's Ethernet to R5 - 172.16.2.1 /24
R5's interface - 172.16.2.2 /24
From what I read from Cisco books, since the RIPv1 network in this e.g. is
/24, both routes 192.168.1.0/29 & 172.16.5.0/25 would need to be summarized
into a /24 (at R1) before R4 would be willing to pass these routes to R5.
However, on the moment, all I had at R1 is:-
interface Serial0/0.2 point-to-point
ip address 192.168.2.1 255.255.255.0
ip summary-address eigrp 65001 172.16.5.0 255.255.255.0 5
frame-relay interface-dlci 130
And you can see that R5 "somehow" managed to get the Frame-Relay route
(192.168.1.0/29) - into a /24, don't undersantd how.
R5#sh ip route
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, ia - IS-IS inter
area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 4 subnets
R 172.16.5.0 [120/5] via 172.16.2.1, 00:00:24, Ethernet0
R 172.16.6.0 [120/5] via 172.16.2.1, 00:00:24, Ethernet0
C 172.16.2.0 is directly connected, Ethernet0
R 172.16.3.0 [120/5] via 172.16.2.1, 00:00:24, Ethernet0
10.0.0.0/24 is subnetted, 1 subnets
C 10.0.0.0 is directly connected, Dialer0
R 192.168.1.0/24 [120/5] via 172.16.2.1, 00:00:24, Ethernet0
R 192.168.2.0/24 [120/5] via 172.16.2.1, 00:00:24, Ethernet0
30.0.0.0/24 is subnetted, 1 subnets
C 30.3.3.0 is directly connected, Loopback0
R5#
Yet I can see it clearly that the Frame Relay routes were definitely a /29
R1#sh ip route
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, ia - IS-IS inter
area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
D 172.16.5.0/24 is a summary, 03:55:51, Null0
C 172.16.5.0/25 is directly connected, Loopback1
D 172.16.6.0/24 [90/20640000] via 192.168.1.2, 03:53:17, Serial0/0.1
D 172.16.2.0/24 [90/2195456] via 192.168.2.2, 03:54:30, Serial0/0.2
D 172.16.3.0/24 [90/20640000] via 192.168.1.3, 03:56:00, Serial0/0.1
192.168.1.0/29 is subnetted, 1 subnets
C 192.168.1.0 is directly connected, Serial0/0.1
C 192.168.2.0/24 is directly connected, Serial0/0.2
R1#
R4#sh ip route
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, ia - IS-IS inter
area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 4 subnets
D 172.16.5.0 [90/2297856] via 192.168.2.1, 03:56:59, Serial0
D 172.16.6.0 [90/21152000] via 192.168.2.1, 03:55:45, Serial0
C 172.16.2.0 is directly connected, Ethernet0
D 172.16.3.0 [90/21152000] via 192.168.2.1, 03:56:59, Serial0
192.168.1.0/29 is subnetted, 1 subnets
D 192.168.1.0 [90/21024000] via 192.168.2.1, 03:56:59, Serial0
C 192.168.2.0/24 is directly connected, Serial0
R4#
Thanks in advance,
Hunt
.
This archive was generated by hypermail 2.1.4 : Fri Jan 17 2003 - 17:21:49 GMT-3