From: hktco (ccnpcert@hotmail.com)
Date: Tue May 17 2005 - 09:33:12 GMT-3
Hi all,
I don't understand why the following prefix list returns no result. When no
prefix list is configured, the route exists in the route table. Someone
please help and many thanks!!!
ip prefix-list Nontrading seq 2 permit 192.168.21.0/24
hktco
==========
r2#sh ip os ne
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 1 FULL/BDR 00:00:35 192.168.1.1
FastEthernet0.1
r2#sh run
Building configuration...
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0
no ip address
no ip redirects
no ip proxy-arp
speed auto
no cdp enable
!
interface FastEthernet0.1
encapsulation dot1Q 2 native
ip address 192.168.1.2 255.255.255.0
no ip redirects
no ip proxy-arp
standby 11 ip 192.168.1.253
standby 11 priority 95
standby 11 preempt
standby 12 ip 192.168.1.254
standby 12 preempt
!
!
interface Async5
ip address 10.2.2.2 255.255.255.0
no ip redirects
no ip proxy-arp
encapsulation ppp
ip ospf cost 10000
async dynamic routing
async mode dedicated
no peer neighbor-route
no keepalive
cdp enable
!
router ospf 100
router-id 2.2.2.2
log-adjacency-changes
redistribute static metric-type 1 subnets
network 0.0.0.0 255.255.255.255 area 0
distribute-list prefix Nontrading in
!
ip classless
ip route 192.168.11.0 255.255.255.0 192.168.1.100
ip route 192.168.12.0 255.255.255.0 192.168.1.100
no ip http server
no ip http secure-server
!
!
!
ip prefix-list Nontrading seq 10 permit 0.0.0.0/0 le 32
r2#sh ip ro os
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/2] via 192.168.1.1, 00:00:20, FastEthernet0.1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/10002] via 192.168.1.1, 00:00:20, FastEthernet0.1
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/10003] via 192.168.1.1, 00:00:20, FastEthernet0.1
O E1 192.168.21.0/24 [110/10022] via 192.168.1.1, 00:00:20, FastEthernet0.1
10.0.0.0/24 is subnetted, 2 subnets
O 10.1.1.0 [110/10001] via 192.168.1.1, 00:00:20, FastEthernet0.1
O E1 192.168.22.0/24 [110/10022] via 192.168.1.1, 00:00:20, FastEthernet0.1
O 192.168.2.0/24 [110/10002] via 192.168.1.1, 00:00:20, FastEthernet0.1
r2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
r2(config)#ip pre
r2(config)#ip prefix-list Nontrading seq 1 deny 192.168.22.0/24
r2(config)#^Z
r2#sh run | in ip pref
ip prefix-list Nontrading seq 1 deny 192.168.22.0/24
ip prefix-list Nontrading seq 5 permit 0.0.0.0/0 le 32
r2#sh ip ro os
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/2] via 192.168.1.1, 00:00:24, FastEthernet0.1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/10002] via 192.168.1.1, 00:00:24, FastEthernet0.1
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/10003] via 192.168.1.1, 00:00:24, FastEthernet0.1
O E1 192.168.21.0/24 [110/10022] via 192.168.1.1, 00:00:24, FastEthernet0.1
10.0.0.0/24 is subnetted, 2 subnets
O 10.1.1.0 [110/10001] via 192.168.1.1, 00:00:24, FastEthernet0.1
O 192.168.2.0/24 [110/10002] via 192.168.1.1, 00:00:24, FastEthernet0.1
r2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
r2(config)#ip prefix-list Nontrading seq 2 deny 192.168.21.0/24
r2(config)#^Z
r2#sh ip ro os
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/2] via 192.168.1.1, 00:00:02, FastEthernet0.1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/10002] via 192.168.1.1, 00:00:02, FastEthernet0.1
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/10003] via 192.168.1.1, 00:00:02, FastEthernet0.1
10.0.0.0/24 is subnetted, 2 subnets
O 10.1.1.0 [110/10001] via 192.168.1.1, 00:00:02, FastEthernet0.1
O 192.168.2.0/24 [110/10002] via 192.168.1.1, 00:00:02, FastEthernet0.1
r2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
r2(config)#no ip pre Nontrading seq 1
r2#sh run | in ip pref
ip prefix-list Nontrading seq 1 deny 192.168.22.0/24
ip prefix-list Nontrading seq 2 deny 192.168.21.0/24
ip prefix-list Nontrading seq 5 permit 0.0.0.0/0 le 32
r2#sr os
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/2] via 192.168.1.1, 00:00:32, FastEthernet0.1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/10002] via 192.168.1.1, 00:00:32, FastEthernet0.1
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/10003] via 192.168.1.1, 00:00:32, FastEthernet0.1
10.0.0.0/24 is subnetted, 2 subnets
O 10.1.1.0 [110/10001] via 192.168.1.1, 00:00:32, FastEthernet0.1
O 192.168.2.0/24 [110/10002] via 192.168.1.1, 00:00:32, FastEthernet0.1
r2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
r2(config)#no ip prefix-list Nontrading seq 1 deny 192.168.22.0/24
r2(config)#^Z
r2#sr os
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/2] via 192.168.1.1, 00:00:03, FastEthernet0.1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/10002] via 192.168.1.1, 00:00:03, FastEthernet0.1
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/10003] via 192.168.1.1, 00:00:03, FastEthernet0.1
10.0.0.0/24 is subnetted, 2 subnets
O 10.1.1.0 [110/10001] via 192.168.1.1, 00:00:03, FastEthernet0.1
O E1 192.168.22.0/24 [110/10022] via 192.168.1.1, 00:00:03, FastEthernet0.1
O 192.168.2.0/24 [110/10002] via 192.168.1.1, 00:00:03, FastEthernet0.1
r2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
r2(config)#no ip prefix-list Nontrading seq 2 deny 192.168.21.0/24
r2(config)#ip prefix-list Nontrading seq 2 per 192.168.21.0/24
r2(config)#^Z
r2#sh ip ro os
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/2] via 192.168.1.1, 00:00:02, FastEthernet0.1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/10002] via 192.168.1.1, 00:00:02, FastEthernet0.1
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/10003] via 192.168.1.1, 00:00:02, FastEthernet0.1
O E1 192.168.21.0/24 [110/10022] via 192.168.1.1, 00:00:02, FastEthernet0.1
10.0.0.0/24 is subnetted, 2 subnets
O 10.1.1.0 [110/10001] via 192.168.1.1, 00:00:02, FastEthernet0.1
O E1 192.168.22.0/24 [110/10022] via 192.168.1.1, 00:00:02, FastEthernet0.1
O 192.168.2.0/24 [110/10002] via 192.168.1.1, 00:00:02, FastEthernet0.1
r2#
r2#sh run | in pref
distribute-list prefix Nontrading in
ip prefix-list Nontrading description Disallow non-trading traffic to use
the IPLC
ip prefix-list Nontrading seq 2 permit 192.168.21.0/24
ip prefix-list Nontrading seq 5 permit 0.0.0.0/0 le 32
r2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
r2(config)#no ip prefix-list Nontrading seq 5 permit 0.0.0.0/0 le 32
r2(config)#^Z
r2#sh run | in pref
distribute-list prefix Nontrading in
ip prefix-list Nontrading seq 2 permit 192.168.21.0/24
r2#sh ip ro os
r2#debug ip routing
IP routing debugging is on
! TELNET INTO ROUTER TO CHANGE THE DISTRIBUTE-LIST
r2#
!ALLOW ALL 0.0.0.0/0 le 32
000044: *Mar 1 08:45:53.195: RT: add 10.1.1.0/24 via 192.168.1.1, ospf
metric [110/10001]
000045: *Mar 1 08:45:53.195: RT: NET-RED 10.1.1.0/24
000046: *Mar 1 08:45:53.195: RT: NET-RED queued, Queue size 1
000047: *Mar 1 08:45:53.195: RT: add 192.168.2.0/24 via 192.168.1.1, ospf
metric [110/10002]
000048: *Mar 1 08:45:53.195: RT: NET-RED 192.168.2.0/24
000049: *Mar 1 08:45:53.199: RT: NET-RED queued, Queue size 2
000050: *Mar 1 08:45:53.199: RT: add 1.1.1.1/32 via 192.168.1.1, ospf
metric [110/2]
000051: *Mar 1 08:45:53.199: RT: NET-RED 1.1.1.1/32
000052: *Mar 1 08:45:53.199: RT: NET-RED queued, Queue size 3
000053: *Mar 1 08:45:53.199: RT: add 3.3.3.3/32 via 192.168.1.1, ospf
metric [110/10002]
000054: *Mar 1 08:45:53.199: RT: NET-RED 3.3.3.3/32
000055: *Mar 1 08:45:53.199: RT: NET-RED queued, Queue size 4
000056: *Mar 1 08:45:53.203: RT: add 4.4.4.4/32 via 192.168.1.1, ospf
metric [110/10003]
000057: *Mar 1 08:45:53.203: RT: NET-RED 4.4.4.4/32
000058: *Mar 1 08:45:53.203: RT: NET-RED queued, Queue size 5
000059: *Mar 1 08:45:53.203: RT: add 192.168.21.0/24 via 192.168.1.1, ospf
metric [110/10022]
000060: *Mar 1 08:45:53.203: RT: NET-RED 192.168.21.0/24
000061: *Mar 1 08:45:53.203: RT: NET-RED queued, Queue size 6
000062: *Mar 1 08:45:53.203: RT: add 192.168.22.0/24 via 192.168.1.1, ospf
metric [110/10022]
000063: *Mar 1 08:45:53.207: RT: NET-RED 192.168.22.0/24
000064: *Mar 1 08:45:53.207: RT: NET-RED queued, Queue size 7
!ALLOW ONLY 192.168.21.0/24
000065: *Mar 1 08:46:16.355: RT: delete route to 1.1.1.1/32
000066: *Mar 1 08:46:16.355: RT: NET-RED 1.1.1.1/32
000067: *Mar 1 08:46:16.355: RT: NET-RED queued, Queue size 1
000068: *Mar 1 08:46:16.355: RT: delete network route to 1.0.0.0
000069: *Mar 1 08:46:16.355: RT: NET-RED 1.0.0.0/8
000070: *Mar 1 08:46:16.355: RT: NET-RED queued, Queue size 2
000071: *Mar 1 08:46:16.359: RT: delete route to 3.3.3.3/32
000072: *Mar 1 08:46:16.359: RT: NET-RED 3.3.3.3/32
000073: *Mar 1 08:46:16.359: RT: NET-RED queued, Queue size 3
000074: *Mar 1 08:46:16.359: RT: delete network route to 3.0.0.0
000075: *Mar 1 08:46:16.359: RT: NET-RED 3.0.0.0/8
000076: *Mar 1 08:46:16.359: RT: NET-RED queued, Queue size 4
000077: *Mar 1 08:46:16.363: RT: delete route to 4.4.4.4/32
000078: *Mar 1 08:46:16.363: RT: NET-RED 4.4.4.4/32
000079: *Mar 1 08:46:16.363: RT: NET-RED queued, Queue size 5
000080: *Mar 1 08:46:16.363: RT: delete network route to 4.0.0.0
000081: *Mar 1 08:46:16.363: RT: NET-RED 4.0.0.0/8
000082: *Mar 1 08:46:16.363: RT: NET-RED queued, Queue size 6
000083: *Mar 1 08:46:16.367: RT: delete route to 192.168.21.0/24
000084: *Mar 1 08:46:16.367: RT: NET-RED 192.168.21.0/24
000085: *Mar 1 08:46:16.367: RT: NET-RED queued, Queue size 7
000086: *Mar 1 08:46:16.367: RT: delete route to 10.1.1.0/24
000087: *Mar 1 08:46:16.367: RT: NET-RED 10.1.1.0/24
000088: *Mar 1 08:46:16.367: RT: NET-RED queued, Queue size 8
000089: *Mar 1 08:46:16.371: RT: delete route to 192.168.22.0/24
000090: *Mar 1 08:46:16.371: RT: NET-RED 192.168.22.0/24
000091: *Mar 1 08:46:16.371: RT: NET-RED queued, Queue size 9
000092: *Mar 1 08:46:16.371: RT: delete route to 192.168.2.0/24
000093: *Mar 1 08:46:16.375: RT: NET-RED 192.168.2.0/24
000094: *Mar 1 08:46:16.375: RT: NET-RED queued, Queue size 10
000095: *Mar 1 08:46:16.927: %SYS-5-CONFIG_I: Configured from console by
vty0 (192.168.1.1)
r2#
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