From: John Matijevic (matijevic@telocity.com)
Date: Fri Dec 20 2002 - 15:40:27 GMT-3
Hello,
I have to agree with cebuano you would need to turn off router summarization
by the use of the no auto-summary command under the rip process. Should be
able to repro issue if necessary.
Sincerely,
John
----- Original Message -----
From: "cebuano" <cebu2ccie@cox.net>
To: <ccielab@groupstudy.com>
Sent: Friday, December 20, 2002 12:58 PM
Subject: RE: What if EIGRP routes have different masks than RIP?
> Hunt,
> The DEFAULT EIGRP behavior is to perform AUTO-SUMMARY.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Hunt Lee
> Sent: Thursday, December 19, 2002 10:40 PM
> To: 'ccielab@groupstudy.com'
> Subject: What if EIGRP routes have different masks than RIP?
>
> 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
> .
> .
.
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