From: Erick B. (erickbe@xxxxxxxxx)
Date: Sun Nov 11 2001 - 18:46:35 GMT-3
Albert,
Look into split horizon on R4.
Erick
--- Albert Lu <albert_ccie@yahoo.com> wrote:
> Hello All,
>
> What can I say?? I give up!! Could someone please
> take a look at my configs
> and tell me why my 200.0.0.0/24 route is going into
> hold down?
>
> Basically, the 2 routers that are involved in this
> are R2 and R4 with R2
> running EIGRP and IGRP, and R4 running IGRP only. R2
> has a 200.0.0.2/32
> loopback being redistributed from EIGRP into IGRP
> and towards R4. R4 has a
> 200.0.0.4/32 loopback being redistributed connected
> into IGRP on R4.
>
> I've filtered out the propagation of the
> 200.0.0.4/32 route into IGRP as can
> be seen in the deny_200 route-map on R2, so the only
> router that should be
> getting any 200.0.0.0 routes should be R2 seeing
> R4's loopback of
> 200.0.0.4/32 (seen as a 200.0.0.0/24 on R4).
> However, this 200.0.0.0/24 is
> being sent back to R4 after R2 goes into hold down
> for the 200.0.0.0/24
> route.
>
> I've been working on this problem for too long.
> Please help!!
>
> Thanks in advance
>
> Albert
>
>
>
> R2 Config
> --------------
> !
> version 12.1
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname R2
> !
> logging buffered 55000 debugging
> enable password cisco
> !
> !
> !
> !
> !
> ip subnet-zero
> ip tcp synwait-time 5
> no ip domain-lookup
> !
> cns event-service server
> !
> !
> !
> !
> !
> !
> !
> !
> !
> interface Loopback0
> ip address 200.0.0.2 255.255.255.255
> !
> interface Ethernet0/0
> ip address 150.50.17.2 255.255.255.0
> half-duplex
> !
> interface Serial0/0
> no ip address
> encapsulation frame-relay
> no fair-queue
> !
> interface Serial0/0.1 point-to-point
> ip address 150.50.24.2 255.255.255.0
> ip summary-address eigrp 1 150.50.100.0
> 255.255.255.0 5
> ip summary-address eigrp 1 150.50.7.0 255.255.255.0
> 5
> ip summary-address eigrp 1 150.50.5.0 255.255.255.0
> 5
> no arp frame-relay
> frame-relay interface-dlci 104
> !
> interface Serial0/0.2 multipoint
> ip address 150.50.100.2 255.255.255.224
> ip hello-interval eigrp 1 20
> ip hold-time eigrp 1 60
> frame-relay interface-dlci 105
> frame-relay interface-dlci 106
> !
> interface TokenRing0/0
> no ip address
> shutdown
> ring-speed 16
> !
> interface ATM1/0
> no ip address
> shutdown
> atm vc-per-vp 4096
> no atm ilmi-keepalive
> !
> router eigrp 1
> redistribute igrp 2 metric 1000 100 255 1 1500
> passive-interface Serial0/0.1
> passive-interface Loopback0
> network 150.50.0.0
> network 200.0.0.2 0.0.0.0
> no auto-summary
> no eigrp log-neighbor-changes
> !
> router igrp 2
> timers basic 5 15 20 30
> redistribute eigrp 1 metric 1000 100 255 1 1500
> route-map deny_200
> passive-interface Ethernet0/0
> passive-interface Serial0/0.2
> network 150.50.0.0
> !
> ip classless
> ip http server
> !
> access-list 1 deny 200.0.0.0 0.0.0.255
> access-list 1 permit any
> route-map deny_200 permit 10
> match ip address 1
> !
> !
>
> R4 Config
> ---------
>
> !
> version 12.1
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname R4
> !
> logging buffered 55000 debugging
> enable secret 5 $1$a4Gk$e21ITX3LOKrRnMlIeVILY1
> enable password cisco
> !
> !
> !
> !
> !
> ip subnet-zero
> ip tcp synwait-time 5
> no ip domain-lookup
> !
> cns event-service server
> !
> !
> !
> !
> !
> !
> !
> !
> !
> interface Loopback0
> ip address 200.0.0.4 255.255.255.255
> !
> interface Loopback1
> ip address 10.1.1.4 255.255.255.0
> !
> interface FastEthernet0/0
> no ip address
> shutdown
> duplex auto
> speed auto
> !
> interface Serial0/0
> ip address 150.50.24.4 255.255.255.0
> encapsulation frame-relay
> ip split-horizon
> no fair-queue
> frame-relay map ip 150.50.24.2 401 broadcast
> no frame-relay inverse-arp
> !
> interface Serial0/1
> no ip address
> shutdown
> !
> router igrp 2
> timers basic 5 15 20 30
> redistribute connected
> network 150.50.0.0
> !
> ip classless
> no ip http server
> !
>
>
> R2#sh ip ro
> 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
>
> 200.0.0.0/32 is subnetted, 6 subnets
> D EX 200.0.0.8 [170/297784576] via 150.50.100.5,
> 00:03:19, Serial0/0.2
> [170/297784576] via 150.50.100.6,
> 00:03:19, Serial0/0.2
> D EX 200.0.0.1 [170/2611200] via 150.50.17.1,
> 00:03:19, Ethernet0/0
> C 200.0.0.2 is directly connected, Loopback0
> D EX 200.0.0.5 [170/3097600] via 150.50.100.5,
> 00:03:19, Serial0/0.2
> D EX 200.0.0.6 [170/3097600] via 150.50.100.6,
> 00:03:19, Serial0/0.2
> D EX 200.0.0.7 [170/3100160] via 150.50.100.5,
> 00:03:19, Serial0/0.2
> [170/3100160] via 150.50.100.6,
> 00:03:20, Serial0/0.2
> 173.16.0.0/22 is subnetted, 1 subnets
> D 173.16.0.0 [90/2300416] via 150.50.100.5,
> 00:03:20, Serial0/0.2
> [90/2300416] via 150.50.100.6,
> 00:03:20, Serial0/0.2
> 150.50.0.0/16 is variably subnetted, 12
> subnets, 3 masks
> D 150.50.200.0/24 [90/409600] via 150.50.17.1,
> 00:03:22, Ethernet0/0
> D 150.50.4.0/24 [90/297886976] via
> 150.50.100.5, 00:03:22, Serial0/0.2
> [90/297886976] via
> 150.50.100.6, 00:03:22, Serial0/0.2
> D 150.50.5.0/25 [90/297758976] via
> 150.50.100.5, 00:03:22, Serial0/0.2
> [90/297758976] via
> 150.50.100.6, 00:03:22, Serial0/0.2
> D 150.50.5.0/24 is a summary, 00:03:22, Null0
> D 150.50.7.0/25 [90/2172416] via 150.50.100.5,
> 00:03:22, Serial0/0.2
> [90/2172416] via 150.50.100.6,
> 00:03:22, Serial0/0.2
> D 150.50.7.0/24 is a summary, 00:03:22, Null0
> D 150.50.3.0/24 [90/297886976] via
> 150.50.100.5, 00:03:22, Serial0/0.2
> [90/297886976] via
> 150.50.100.6, 00:03:22, Serial0/0.2
> C 150.50.17.0/24 is directly connected,
> Ethernet0/0
> D 150.50.18.0/24 [90/409600] via 150.50.17.1,
> 00:03:22, Ethernet0/0
> C 150.50.24.0/24 is directly connected,
> Serial0/0.1
> D 150.50.100.0/24 is a summary, 00:03:24,
> Null0
> C 150.50.100.0/27 is directly connected,
> Serial0/0.2
> R2#
> 09:31:16: RT: network 200.0.0.0 is now variably
> masked
> 09:31:16: RT: add 200.0.0.0/24 via 150.50.24.4, igrp
> metric [100/8976]
> 09:31:16: RT: add 10.0.0.0/8 via 150.50.24.4, igrp
> metric [100/8976]
> R2#
> 09:31:31: RT: flushed route to 200.0.0.0 via
> 150.50.24.4 (Serial0/0.1)
> 09:31:31: RT: no routes to 200.0.0.0, entering
> holddown
> R2#
> 09:31:49: RT: garbage collecting entry for 200.0.0.0
> R2#
> 09:31:51: RT: network 200.0.0.0 is now variably
> masked
> 09:31:51: RT: add 200.0.0.0/24 via 150.50.24.4, igrp
> metric [100/8976]
> R2#
> 09:32:08: RT: flushed route to 200.0.0.0 via
> 150.50.24.4 (Serial0/0.1)
> 09:32:08: RT: no routes to 200.0.0.0, entering
> holddown
> R2#
> 09:32:25: RT: garbage collecting entry for 200.0.0.0
> R2#
> 09:32:26: RT: network 200.0.0.0 is now variably
> masked
> 09:32:26: RT: add 200.0.0.0/24 via 150.50.24.4, igrp
> metric [100/8976]
> R2#
> 09:32:43: RT: flushed route to 200.0.0.0 via
> 150.50.24.4 (Serial0/0.1)
> 09:32:43: RT: no routes to 200.0.0.0, entering
> holddown
> R2#
> 09:32:57: RT: garbage collecting entry for 200.0.0.0
> 09:32:57: RT: network 200.0.0.0 is now variably
> masked
> 09:32:57: RT: add 200.0.0.0/24 via 150.50.24.4, igrp
> metric [100/8976]
> R2#
> 09:33:15: RT: flushed route to 200.0.0.0 via
> 150.50.24.4 (Serial0/0.1)
> 09:33:15: RT: no routes to 200.0.0.0, entering
> holddown
> R2#
> 09:33:29: RT: garbage collecting entry for 200.0.0.0
> 09:33:29: RT: network 200.0.0.0 is now variably
> masked
> 09:33:29: RT: add 200.0.0.0/24 via 150.50.24.4, igrp
> metric [100/8976]
> R2#
> 09:33:46: RT: flushed route to 200.0.0.0 via
> 150.50.24.4 (Serial0/0.1)
> 09:33:46: RT: no routes to 200.0.0.0, entering
> holddown
> R2#
> 09:34:00: RT: garbage collecting entry for 200.0.0.0
> R2#
> 09:34:01: RT: network 200.0.0.0 is now variably
> masked
> 09:34:01: RT: add 200.0.0.0/24 via 150.50.24.4, igrp
> metric [100/8976]
> R2#
> 09:34:18: RT: flushed route to 200.0.0.0 via
> 150.50.24.4 (Serial0/0.1)
> 09:34:18: RT: no routes to 200.0.0.0, entering
> holddown
> R2#
> 09:34:33: RT: garbage collecting entry for 200.0.0.0
> 09:34:33: RT: network 200.0.0.0 is now variably
> masked
> 09:34:33: RT: add 200.0.0.0/24 via 150.50.24.4, igrp
> metric [100/8976]
> R2#
>
> R4#sh ip ro
> 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
>
> 200.0.0.0/32 is subnetted, 1 subnets
> C 200.0.0.4 is directly connected, Loopback0
> I 173.16.0.0/16 [100/10986] via 150.50.24.2,
> 00:00:02, Serial0/0
> 10.0.0.0/24 is subnetted, 1 subnets
> C 10.1.1.0 is directly connected, Loopback1
> 150.50.0.0/24 is subnetted, 9 subnets
> I 150.50.200.0 [100/9076] via 150.50.24.2,
> 00:00:02, Serial0/0
> I 150.50.4.0 [100/1165621] via 150.50.24.2,
> 00:00:02, Serial0/0
> I 150.50.5.0 [100/1165121] via 150.50.24.2,
> 00:00:02, Serial0/0
> I 150.50.7.0 [100/10486] via 150.50.24.2,
> 00:00:03, Serial0/0
> I 150.50.3.0 [100/1165621] via 150.50.24.2,
> 00:00:03, Serial0/0
> I 150.50.17.0 [100/8576] via 150.50.24.2,
> 00:00:03, Serial0/0
> I 150.50.18.0 [100/9076] via 150.50.24.2,
> 00:00:03, Serial0/0
>
> R4#
> 09:32:00: RT: network 200.0.0.0 is now variably
> masked
> 09:32:00: RT: add 200.0.0.0/24 via 150.50.24.2, igrp
> metric [100/8976]
> R4#
> 09:32:19: RT: flushed route to 200.0.0.0 via
> 150.50.24.2 (Serial0/0)
> 09:32:19: RT: no routes to 200.0.0.0, entering
> holddown
> R4#
> 09:32:33: RT: garbage collecting entry for 200.0.0.0
> R4#
> 09:32:36: RT: network 200.0.0.0 is now variably
> masked
> 09:32:36: RT: add 200.0.0.0/24 via 150.50.24.2, igrp
> metric [100/8976]
> R4#
> 09:32:54: RT: flushed route to 200.0.0.0 via
> 150.50.24.2 (Serial0/0)
> 09:32:54: RT: no routes to 200.0.0.0, entering
> holddown
> R4#
> 09:33:08: RT: garbage collecting entry for 200.0.0.0
> R4#
> 09:33:11: RT: network 200.0.0.0 is now variably
> masked
> 09:33:11: RT: add 200.0.0.0/24 via 150.50.24.2, igrp
> metric [100/8976]
> R4#
> 09:33:30: RT: flushed route to 200.0.0.0 via
> 150.50.24.2 (Serial0/0)
> 09:33:30: RT: no routes to 200.0.0.0, entering
> holddown
> R4#
> 09:33:43: RT: garbage collecting entry for 200.0.0.0
> 09:33:43: RT: network 200.0.0.0 is now variably
> masked
> 09:33:43: RT: add 200.0.0.0/24 via 150.50.24.2, igrp
> metric [100/8976]
> R4#
> 09:34:02: RT: flushed route to 200.0.0.0 via
> 150.50.24.2 (Serial0/0)
> 09:34:02: RT: no routes to 200.0.0.0, entering
> holddown
> R4#
> 09:34:16: RT: garbage collecting entry for 200.0.0.0
> R4#
> 09:34:19: RT: network 200.0.0.0 is now variably
> masked
> 09:34:19: RT: add 200.0.0.0/24 via 150.50.24.2, igrp
> metric [100/8976]
> R4#
> 09:34:35: RT: flushed route to 200.0.0.0 via
> 150.50.24.2 (Serial0/0)
> 09:34:35: RT: no routes to 200.0.0.0, entering
> holddown
> R4#
> 09:34:53: RT: garbage collecting entry for 200.0.0.0
> R4#
> 09:34:57: RT: network 200.0.0.0 is now variably
> masked
> 09:34:57: RT: add 200.0.0.0/24 via 150.50.24.2, igrp
> metric [100/8976]
> R4#
> 09:35:16: RT: flushed route to 200.0.0.0 via
> 150.50.24.2 (Serial0/0)
> 09:35:16: RT: no routes to 200.0.0.0, entering
> holddown
> R4#
> 09:35:29: RT: garbage collecting entry for 200.0.0.0
> R4#
> 09:35:50: RT: network 200.0.0.0 is now variably
> masked
> 09:35:50: RT: add 200.0.0.0/24 via 150.50.24.2, igrp
> metric [100/8976]
> R4#
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