From: Tony Olzak (aolzak@xxxxxxxxxxxxxxxxxxx)
Date: Tue Dec 05 2000 - 15:54:07 GMT-3
Paste your configs and a network diagram.
Tony
----- Original Message -----
From: "Andrew Lennon" <andrew.lennon@nscglobal.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, December 05, 2000 10:56 AM
Subject: RE: Demand routes in OSPF
> Having done a b4 and after, the routes not reverting are the IGRP routes
> from r2 and the loopback on r2. The metric is 170 via s0 and 1672 via
bri0.
> I am stumped!
>
> Andy
>
> Before:
>
> Gateway of last resort is 172.16.130.10 to network 0.0.0.0
>
> O E2 192.168.10.0/24 [110/15] via 172.16.130.10, 00:44:12, Serial0
> O E2 172.17.0.0/16 [110/1] via 172.16.130.6, 00:43:41, Serial0
> 172.16.0.0/16 is variably subnetted, 19 subnets, 5 masks
> O E2 172.16.164.0/24 [110/20] via 172.16.130.6, 00:44:12, Serial0
> O E1 172.16.160.0/24 [110/170] via 172.16.130.6, 00:40:19, Serial0
> O E1 172.16.161.0/24 [110/170] via 172.16.130.6, 00:40:19, Serial0
> O E1 172.16.162.0/24 [110/170] via 172.16.130.6, 00:44:12, Serial0
> O E1 172.16.163.0/24 [110/170] via 172.16.130.6, 00:44:12, Serial0
> O IA 172.16.136.0/24 [110/100] via 172.16.130.6, 00:44:12, Serial0
> O IA 172.16.137.0/24 [110/106] via 172.16.130.6, 00:44:08, Serial0
> O IA 172.16.132.0/22 [110/60] via 172.16.130.6, 00:44:13, Serial0
> C 172.16.130.0/28 is directly connected, Serial0
> O 172.16.10.1/32 [110/51] via 172.16.130.10, 00:44:13, Serial0
> C 172.16.5.0/24 is directly connected, Loopback0
> O E1 172.16.7.0/24 [110/170] via 172.16.130.6, 00:44:26, Serial0
> O IA 172.16.17.17/32 [110/61] via 172.16.130.6, 00:44:26, Serial0
> O IA 172.16.6.6/32 [110/51] via 172.16.130.6, 00:44:26, Serial0
> O IA 172.16.4.4/32 [110/101] via 172.16.130.6, 00:44:26, Serial0
> O IA 172.16.2.2/32 [110/61] via 172.16.130.6, 00:44:26, Serial0
> O E2 172.16.2.0/24 [110/20] via 172.16.130.6, 00:44:26, Serial0
> C 172.16.130.252/30 is directly connected, BRI0
> C 172.16.100.0/24 is directly connected, TokenRing0
> O E2 158.152.0.0/16 [110/1] via 172.16.130.6, 00:43:56, Serial0
> O E2 192.168.5.0/24 [110/15] via 172.16.130.10, 00:44:27, Serial0
> O E2 195.92.65.0/24 [110/15] via 172.16.130.10, 00:44:27, Serial0
> O E2 10.0.0.0/8 [110/1] via 172.16.130.6, 00:43:56, Serial0
> 192.168.6.0/27 is subnetted, 1 subnets
> O 192.168.6.224 [110/60] via 172.16.130.10, 00:44:27, Serial0
> O E2 192.168.7.0/24 [110/15] via 172.16.130.10, 00:44:27, Serial0
> O E2 62.0.0.0/8 [110/15] via 172.16.130.10, 00:44:27, Serial0
> O E2 135.136.0.0/16 [110/1] via 172.16.130.6, 00:44:27, Serial0
> O*E2 0.0.0.0/0 [110/1] via 172.16.130.10, 00:44:27, Serial0
>
> After: (once the bri has come up and gone down again)
>
> Gateway of last resort is 172.16.130.10 to network 0.0.0.0
>
> O E2 192.168.10.0/24 [110/15] via 172.16.130.10, 00:07:30, Serial0
> O E2 172.17.0.0/16 [110/1] via 172.16.130.6, 00:07:30, Serial0
> 172.16.0.0/16 is variably subnetted, 19 subnets, 5 masks
> O E2 172.16.164.0/24 [110/20] via 172.16.130.254, 00:07:30, BRI0
> O E1 172.16.160.0/24 [110/1672] via 172.16.130.254, 00:07:30, BRI0
> O E1 172.16.161.0/24 [110/1672] via 172.16.130.254, 00:07:30, BRI0
> O E1 172.16.162.0/24 [110/1672] via 172.16.130.254, 00:07:30, BRI0
> O E1 172.16.163.0/24 [110/1672] via 172.16.130.254, 00:07:30, BRI0
> O IA 172.16.136.0/24 [110/100] via 172.16.130.6, 00:07:30, Serial0
> O IA 172.16.137.0/24 [110/106] via 172.16.130.6, 00:07:31, Serial0
> O IA 172.16.132.0/22 [110/60] via 172.16.130.6, 00:07:31, Serial0
> C 172.16.130.0/28 is directly connected, Serial0
> O 172.16.10.1/32 [110/51] via 172.16.130.10, 00:54:02, Serial0
> C 172.16.5.0/24 is directly connected, Loopback0
> O E1 172.16.7.0/24 [110/1672] via 172.16.130.254, 00:07:32, BRI0
> O IA 172.16.17.17/32 [110/61] via 172.16.130.6, 00:07:32, Serial0
> O IA 172.16.6.6/32 [110/51] via 172.16.130.6, 00:07:32, Serial0
> O IA 172.16.4.4/32 [110/101] via 172.16.130.6, 00:07:32, Serial0
> O IA 172.16.2.2/32 [110/61] via 172.16.130.6, 00:07:32, Serial0
> O E2 172.16.2.0/24 [110/20] via 172.16.130.254, 00:07:32, BRI0
> C 172.16.130.252/30 is directly connected, BRI0
> C 172.16.100.0/24 is directly connected, TokenRing0
> O E2 158.152.0.0/16 [110/1] via 172.16.130.6, 00:07:33, Serial0
> O E2 192.168.5.0/24 [110/15] via 172.16.130.10, 00:07:33, Serial0
> O E2 195.92.65.0/24 [110/15] via 172.16.130.10, 00:07:33, Serial0
> O E2 10.0.0.0/8 [110/1] via 172.16.130.6, 00:07:33, Serial0
> 192.168.6.0/27 is subnetted, 1 subnets
> O 192.168.6.224 [110/60] via 172.16.130.10, 00:54:04, Serial0
> O E2 192.168.7.0/24 [110/15] via 172.16.130.10, 00:07:33, Serial0
> O E2 62.0.0.0/8 [110/15] via 172.16.130.10, 00:07:33, Serial0
> O E2 135.136.0.0/16 [110/1] via 172.16.130.6, 00:07:33, Serial0
> O*E2 0.0.0.0/0 [110/1] via 172.16.130.10, 00:07:33, Serial0
> r2504b#
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Tony Olzak
> Sent: Tuesday, December 05, 2000 02:20
> To: Andrew Lennon; ccielab@groupstudy.com
> Subject: Re: Demand routes in OSPF
>
>
> I think what's going on is that you're getting backbone routes from area 5
> over the BRI with a DNA on them. If the metric to area 0 is better through
> area 5, than through area 1, then these routes won't go away when your
area
> 1 link comes back up.
>
> Do a before and after copy of your routing tables to check this out.
>
> Tony
>
> ----- Original Message -----
> From: "Andrew Lennon" <andrew.lennon@nscglobal.com>
> To: <ccielab@groupstudy.com>
> Sent: Monday, December 04, 2000 2:30 PM
> Subject: Demand routes in OSPF
>
>
> > Hi all,
> >
> > I seem to be experiencing a problem with OSPf Demand routes.
> >
> > R2 is running OSPF and IGRP, R5 is running OSPF NBMA. Both are
connected
> > via a BRI using On demand. The line comes up and goes down as normal,
but
> it
> > appears that certain routes on R5 that should have returned to S0 from
> BRI0
> > after it goes down do not switch back. The only way I can get them to
> revert
> > back to S0 is by shutting down BRI0 on R5. I am running 12.0(8). I have
> > included config snips. Any help would be greatly appreciated as I cant
> see
> > where I am going wrong
> > Everything works as expected, until i bring s0 on r5 back up. The routes
> > brought into ospf from IGRP just dont revert back!
> >
> >
> >
> > Many Thanks
> >
> > Andy
> >
> > R2: ospf and igrp
> >
> > interface Serial0
> > bandwidth 2000
> > ip address 172.16.164.2 255.255.255.0
> > no ip directed-broadcast
> > no ip mroute-cache
> > no fair-queue
> > interface BRI0
> > bandwidth 64
> > ip address 172.16.130.254 255.255.255.252
> > no ip directed-broadcast
> > encapsulation ppp
> > dialer idle-timeout 90
> > dialer map ip 172.16.130.253 name r2504b broadcast 1111
> > dialer-group 1
> > isdn switch-type basic-net3
> > no cdp enable
> > ppp authentication chap callin
> > ppp chap hostname ccielab
> > ppp chap password 7 1306141B0E000528
> > router ospf 100
> > redistribute connected subnets route-map filter-bri0
> > redistribute igrp 100 metric 50 metric-type 1 subnets route-map
> igrp-route
> > network 172.16.2.0 0.0.0.255 area 0
> > network 172.16.130.252 0.0.0.3 area 5
> > network 172.16.132.0 0.0.3.255 area 0
> > !
> > router igrp 100
> > passive-interface BRI0
> > passive-interface Serial1
> > passive-interface Ethernet0
> > network 172.16.0.0
> > default-metric 2000 100 255 1 1500
> > !
> > access-list 1 permit 172.16.130.252 0.0.0.3
> > access-list 10 permit 172.16.7.0 0.0.0.255
> > access-list 10 permit 172.16.160.0 0.0.0.255
> > access-list 10 permit 172.16.161.0 0.0.0.255
> > access-list 10 permit 172.16.162.0 0.0.0.255
> > access-list 10 permit 172.16.163.0 0.0.0.255
> > access-list 10 permit 172.16.164.0 0.0.0.255
> > access-list 11 deny any
> > dialer-list 1 protocol ip permit
> > route-map igrp-route permit 10
> > match ip address 10
> > !
> > route-map igrp-route deny 20
> > match ip address 11
> > !
> > route-map filter-bri0 deny 10
> > match ip address 1
> > !
> > route-map filter-bri0 permit 20
> >
> >
> >
> > r5: ospf only
> >
> > interface Loopback0
> > ip address 172.16.5.5 255.255.255.0
> > no ip directed-broadcast
> > !
> > interface Serial0
> > bandwidth 2000
> > ip address 172.16.130.5 255.255.255.240
> > no ip directed-broadcast
> > encapsulation frame-relay
> > ip ospf network broadcast
> > ip ospf priority 0
> > no ip mroute-cache
> > no fair-queue
> > cdp enable
> > frame-relay map ip 172.16.130.6 102 broadcast
> > frame-relay map ip 172.16.130.10 102 broadcast
> > no frame-relay inverse-arp
> > !
> > interface BRI0
> > bandwidth 64
> > ip address 172.16.130.253 255.255.255.252
> > no ip directed-broadcast
> > encapsulation ppp
> > ip ospf demand-circuit
> > shutdown
> > dialer map ip 172.16.130.254 name r2503a broadcast 2222
> > dialer-group 1
> > isdn switch-type basic-net3
> > ppp authentication chap
> > !
> > router ospf 100
> > network 172.16.5.0 0.0.0.255 area 1
> > network 172.16.100.0 0.0.0.3 area 1
> > network 172.16.130.0 0.0.0.31 area 1
> > network 172.16.130.252 0.0.0.3 area 5
> >
> >
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