From: cebuano (cebu2ccie@cox.net)
Date: Sat Dec 21 2002 - 02:05:33 GMT-3
Hunt,
Sorry for not reading your entire message in detail, or I would have
realized you have "no auto" in your EIGRP router(s) as shown in the
routing table. Anyway, to get back to your original question, here are
two explanations for the two networks you are trying to redistribute
into RIP.
1. RIPv1 will not allow you to "inject" 172.16.5.0/25 out the SAME
classful boundary with a mask of /24. Check DoyleVol.1's chapter on
Redistribution.
2. 192.168.1.0/29 will be redistributed by EIGRP into RIPv1 by using its
CLASSFUL boundary mask of /24. AUTO-SUMMARIZATION will occur at the
MAJOR class boundary during redistribution from EIGRP to RIP/IGRP and
this type of redistribution CANNOT be disabled.
HTH,
Elmer
-----Original Message-----
From: Hunt Lee [mailto:ciscoforme3@yahoo.com.au]
Sent: Friday, December 20, 2002 5:58 PM
To: John Matijevic; cebuano
Subject: Re: What if EIGRP routes have different masks than RIP?
Hello John, cebuano,
The auto-summary were already turned off on all EIGRP routers.
Hunt
--- John Matijevic <matijevic@telocity.com> wrote: > 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
> >
>
=== message truncated ===
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