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Beginner

PBR question

Hello,

I am working on setting up some Policy based routing on my router. I need the subnet 172.16.208.0/24 to use 172.16.208.22 as the default gateway for traffic destined only to subnet 172.16.20.0/22. Traffic from 172.16.208.0/24 to anywhere else can use the default routing table. Here is what I have configured

 

access-list 101 permit ip 172.16.208.0 0.0.0.255 172.16.20.0 0.0.3.255

 

route-map 208to20 permit 15
match policy-list 101
set ip next-hop 172.16.208.22

 

interface FastEthernet0/1.6
encapsulation dot1Q 6
ip address 172.16.208.21 255.255.255.0
ip policy route-map 208to20
no snmp trap link-status
no cdp enable

 

When I have this configured like this the I can get connectivity from the 172.16.20.0/22 to 172.16.208.0/24 but all the other networks are now unable to reach 172.16.208.0/24. It looks likes its sending all the traffic to the next hop IP address I have set, regardless of the destination network. 

 

Here is some debugging that I turned on. Looks like its matching when it shouldn't be?

 

.Aug 20 19:56:56.030 PDT: IP: s=172.16.208.3 (FastEthernet0/1.6), d=172.16.5.191, len 60, FIB policy match
.Aug 20 19:56:56.030 PDT: IP: s=172.16.208.3 (FastEthernet0/1.6), d=172.16.5.191, len 60, policy match
.Aug 20 19:56:56.030 PDT: IP: route map 208to20, item 15, permit
.Aug 20 19:56:56.030 PDT: IP: s=172.16.208.3 (FastEthernet0/1.6), d=172.16.5.191 (FastEthernet0/1.6), len 60, policy routed
.Aug 20 19:56:56.030 PDT: IP: FastEthernet0/1.6 to FastEthernet0/1.6 172.16.208.22
.Aug 20 19:57:00.609 PDT: IP: s=172.16.208.3 (FastEthernet0/1.6), d=172.16.5.191, len 60, FIB policy match
.Aug 20 19:57:00.609 PDT: IP: s=172.16.208.3 (FastEthernet0/1.6), d=172.16.5.191, len 60, policy match
.Aug 20 19:57:00.609 PDT: IP: route map 208to20, item 15, permit

 

Any thoughts? 

1 ACCEPTED SOLUTION

Accepted Solutions
Highlighted

Hello arell1234,

your route-map configuration should use match ip address 101 as match command

 

route-map 208to20 permit 15

no match policy-list 101

match ip address 101

set ip next-hop 172.16.208.22

 

 

 

Hope to help

Giuseppe

 

View solution in original post

4 REPLIES 4
Highlighted
Beginner

Can you please share output of  show route-map for the route-map created?

 

Also, please share your routing table output - show ip route

Highlighted

#show route-map
route-map 208to20, permit, sequence 15
Match clauses:
IP Policy lists:
101
Set clauses:
ip next-hop 172.16.208.22
Policy routing matches: 72 packets, 5712 bytes

 

#show access-list 101
Extended IP access list 101
10 permit ip 172.16.208.0 0.0.0.255 172.16.20.0 0.0.3.255

 

#show ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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 172.16.36.22 to network 0.0.0.0

208.49.240.0/29 is subnetted, 1 subnets
B 208.49.240.40 [20/0] via 172.20.1.37, 3w2d
199.77.246.0/30 is subnetted, 4 subnets
B 199.77.246.80 [20/0] via 172.20.1.37, 3w2d
B 199.77.246.28 [20/0] via 172.20.1.37, 3w2d
B 199.77.246.24 [20/0] via 172.20.1.37, 3w2d
B 199.77.246.20 [20/0] via 172.20.1.37, 3w2d
199.77.247.0/30 is subnetted, 5 subnets
B 199.77.247.80 [20/0] via 172.20.1.37, 3w2d
B 199.77.247.40 [20/0] via 172.20.1.37, 3w2d
B 199.77.247.32 [20/0] via 172.20.1.37, 3w2d
B 199.77.247.240 [20/0] via 172.20.1.37, 3w2d
B 199.77.247.236 [20/0] via 172.20.1.37, 3w2d
159.63.0.0/16 is variably subnetted, 4 subnets, 2 masks
B 159.63.19.248/30 [20/0] via 172.20.1.37, 3w2d
B 159.63.19.232/30 [20/0] via 172.20.1.37, 3w2d
B 159.63.101.178/32 [20/0] via 172.20.1.37, 3w2d
B 159.63.34.107/32 [20/0] via 172.20.1.37, 3w2d
172.16.0.0/16 is variably subnetted, 24 subnets, 3 masks
C 172.16.208.0/24 is directly connected, FastEthernet0/1.6
B 172.16.210.0/24 [20/0] via 172.20.1.37, 3w2d
B 172.16.205.0/24 [20/0] via 172.20.1.37, 1d16h
B 172.16.206.0/24 [20/0] via 172.20.1.37, 3w2d
B 172.16.207.0/24 [20/0] via 172.20.1.37, 3w2d
B 172.16.200.0/22 [20/0] via 172.20.1.37, 3w2d
B 172.16.44.0/22 [20/0] via 172.20.1.37, 1w5d
B 172.16.40.0/22 [20/0] via 172.20.1.37, 3w2d
C 172.16.36.0/22 is directly connected, FastEthernet0/1
B 172.16.32.0/22 [20/0] via 172.20.1.37, 3w2d
B 172.16.28.0/22 [20/0] via 172.20.1.37, 3w2d
B 172.16.16.0/22 [20/0] via 172.20.1.37, 1d13h
B 172.16.12.0/22 [20/0] via 172.20.1.37, 1d16h
B 172.16.8.0/22 [20/0] via 172.20.1.37, 3w2d
B 172.16.4.0/22 [20/0] via 172.20.1.37, 3w2d
B 172.16.0.0/22 [20/0] via 172.20.1.37, 3w2d
S 172.16.0.0/16 [150/0] via 172.16.36.22
B 172.16.120.0/22 [20/0] via 172.20.1.37, 3w2d
B 172.16.100.0/22 [20/0] via 172.20.1.37, 3w2d
S 172.16.96.0/22 [1/0] via 172.16.36.22
B 172.16.88.0/22 [20/0] via 172.20.1.37, 3w2d
B 172.16.76.0/22 [20/0] via 172.20.1.37, 3w2d
B 172.16.72.0/22 [20/0] via 172.20.1.37, 2d21h
B 172.16.64.0/22 [20/0] via 172.20.1.37, 3w2d
172.20.0.0/30 is subnetted, 15 subnets
B 172.20.1.132 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.40 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.44 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.32 [20/0] via 172.20.1.37, 3w2d
C 172.20.1.36 is directly connected, FastEthernet0/0
B 172.20.1.28 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.16 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.8 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.12 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.4 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.100 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.88 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.72 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.76 [20/0] via 172.20.1.37, 3w2d
B 172.20.1.64 [20/0] via 172.20.1.37, 3w2d
209.130.198.0/28 is subnetted, 1 subnets
B 209.130.198.64 [20/0] via 172.20.1.37, 3w2d
208.50.228.0/25 is subnetted, 1 subnets
B 208.50.228.128 [20/0] via 172.20.1.37, 1d02h
S 192.168.251.0/24 [150/0] via 172.16.20.22
192.233.250.0/30 is subnetted, 1 subnets
B 192.233.250.68 [20/0] via 172.20.1.37, 3w2d
10.0.0.0/24 is subnetted, 3 subnets
B 10.60.40.0 [20/0] via 172.20.1.37, 3w2d
B 10.60.2.0 [20/0] via 172.20.1.37, 3w2d
B 10.60.0.0 [20/0] via 172.20.1.37, 3w2d
B 192.168.0.0/24 [20/0] via 172.20.1.37, 3w2d
192.233.137.0/30 is subnetted, 1 subnets
B 192.233.137.148 [20/0] via 172.20.1.37, 3w2d
S* 0.0.0.0/0 [1/0] via 172.16.36.22

Highlighted

Hello arell1234,

your route-map configuration should use match ip address 101 as match command

 

route-map 208to20 permit 15

no match policy-list 101

match ip address 101

set ip next-hop 172.16.208.22

 

 

 

Hope to help

Giuseppe

 

View solution in original post

Highlighted

This worked, thanks