From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Thu Jan 05 2006 - 16:47:21 GMT-3
Hello Group,
In this scenario (4.10. RIP Filtering)) we have 3 routers connected a to a
Brodcast network (ethernet) and sw1 is configured in the following way
router rip
offset-list EVEN_SECOND_OCTET in 16 Vlan783
!
ip access-list standard EVEN_SECOND_OCTET
permit 0.0.0.0 255.254.255.255
Now my question is what happens if I'm using even Rack Number, that is, Vlan
8 of switch2 will not have global reachability, and will not accomplish the
task "Configure SW1 so that it does not accept routes with an even second
octet from BB3."
Any Thoughts
Thanks
R4#
interface Ethernet0
ip address 132.1.26.4 255.255.255.0
!
router rip
version 2
passive-interface default
no passive-interface Ethernet0
offset-list EVEN_SECOND_OCTET in 16 Ethernet0
network 132.1.0.0
no auto-summary
!
ip access-list standard EVEN_SECOND_OCTET
permit 0.0.0.0 255.254.255.255
!
After applying offset-list EVEN_SECOND_OCTET in 16 Ethernet0 in the rip
process
R4#SHOW 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 0.0.0.0 to network 0.0.0.0
17.0.0.0/32 is subnetted, 1 subnets
R 17.6.17.17 [120/1] via 132.1.26.10, 00:00:01, Ethernet0
16.0.0.0/32 is subnetted, 1 subnets
R 16.5.17.17 [120/1] via 132.1.26.10, 00:00:01, Ethernet0
19.0.0.0/32 is subnetted, 1 subnets
R 19.8.19.19 [120/1] via 132.1.26.10, 00:00:02, Ethernet0
18.0.0.0/32 is subnetted, 1 subnets
R 18.7.18.18 [120/1] via 132.1.26.10, 00:00:02, Ethernet0
6.0.0.0/32 is subnetted, 1 subnets
R 6.5.7.7 [120/1] via 132.1.26.2, 00:00:08, Ethernet0
7.0.0.0/32 is subnetted, 1 subnets
R 7.6.7.7 [120/1] via 132.1.26.2, 00:00:08, Ethernet0
8.0.0.0/32 is subnetted, 1 subnets
R 8.7.8.8 [120/1] via 132.1.26.2, 00:00:08, Ethernet0
9.0.0.0/32 is subnetted, 1 subnets
R 9.8.9.9 [120/1] via 132.1.26.2, 00:00:08, Ethernet0
132.1.0.0/16 is variably subnetted, 4 subnets, 2 masks
C 132.1.0.0/24 is directly connected, Serial0
O 132.1.0.3/32 [110/64] via 132.1.0.3, 00:00:08, Serial0
C 132.1.26.0/24 is directly connected, Ethernet0
C 132.1.34.0/24 is directly connected, Serial1
Before applying offset-list EVEN_SECOND_OCTET in 16 Ethernet0 in the rip
process
R4#show 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 0.0.0.0 to network 0.0.0.0
16.0.0.0/32 is subnetted, 1 subnets
R 16.5.17.17 [120/1] via 132.1.26.10, 00:00:06, Ethernet0
R 18.7.18.18 [120/1] via 132.1.26.10, 00:00:06, Ethernet0
6.0.0.0/32 is subnetted, 1 subnets
R 6.5.7.7 [120/1] via 132.1.26.2, 00:00:01, Ethernet0
8.0.0.0/32 is subnetted, 1 subnets
R 8.7.8.8 [120/1] via 132.1.26.2, 00:00:01, Ethernet0
C 132.1.0.0/24 is directly connected, Serial0
O 132.1.0.3/32 [110/64] via 132.1.0.3, 00:09:01, Serial0
C 132.1.26.0/24 is directly connected, Ethernet0
C 132.1.34.0/24 is directly connected, Serial1
R2#
interface Loopback0
ip address 9.8.9.9 255.255.255.255
!
interface Loopback1
ip address 8.7.8.8 255.255.255.255
!
interface Loopback2
ip address 7.6.7.7 255.255.255.255
!
interface Loopback3
ip address 6.5.7.7 255.255.255.255
!
interface Ethernet0
ip address 132.1.26.2 255.255.255.0
router rip
version 2
redistribute connected route-map OnlyLbps
passive-interface default
no passive-interface Ethernet0
network 132.1.0.0
no auto-summary
!
route-map OnlyLbps permit 10
match interface Loopback0 Loopback1 Loopback2 Loopback3
!
Switch1#
ip routing
!
interface Loopback0
ip address 19.8.19.19 255.255.255.255
!
interface Loopback1
ip address 18.7.18.18 255.255.255.255
!
interface Loopback2
ip address 17.6.17.17 255.255.255.255
!
interface Loopback3
ip address 16.5.17.17 255.255.255.255
!
interface FastEthernet0/2
switchport access vlan 2
switchport mode access
!
interface FastEthernet0/4
switchport access vlan 2
switchport mode access
!
interface Vlan2
ip address 132.1.26.10 255.255.255.0
!
router rip
version 2
redistribute connected route-map OnlyLbps
network 132.1.0.0
no auto-summary
!
route-map OnlyLbps permit 10
match interface Loopback0 Loopback1 Loopback2 Loopback3
This archive was generated by hypermail 2.1.4 : Wed Feb 01 2006 - 07:45:47 GMT-3