Policy based Routing - 3750

Sheraiz Ahmad · ‎12-03-2012

Hi

I have 2 ISP connected to Router A and Router B

Both the routers are connected to the core 3750 switch.. I want to send the traffic from the switch that goes to router A to router B...

I have done the following but its not working...

vlan 120 = 10.120.0.0/24

vlan 140 = 10.140.0.0/24

access-list 120 permit ip 10.120.0.0 0.0.0.255 any

access-list 140 permit ip 10.140.0.0 0.0.0.255 any

Create a policy that matches on these acls:

route-map NewISP permit 10

match ip address 120

set ip next-hop <new asa ip>

route-map NewISP permit 20

match ip address 140

set ip next-hop <new asa ip>

Then apply to your vlan interfaces:

int vlan 120

ip policy route-map NewISP

int vlan 140

ip policy route-map NewISP

Raju Sekharan · ‎12-03-2012

Hi Sheraiz,

Is the Next-hop IPs are directly connected to the switch where you have configured the policy?

Are you seign ARP entries on your switch for the next-hop IPs

Thanks

Raju

Sheraiz Ahmad · ‎12-03-2012

Hi

Yes the Internet Router is directly connected to the switch.

I am woundering the port where the Router is connected on the switch should be a normal port, or should I configure this as a non switch port.

Thank you

cadet alain · ‎12-03-2012

Hi,

1° ip routing must be enabled on the switch, verify with sh ip route output where you should see your SVIs as directly connected networks

2° you must have the correct SDM template for PBR: verify with sh sdm prefer and change if needed with sdm prefer, you'll nedd to reload for it to take effect

you need this template for PBR:

Desktop dual IPv4 and IPv6 routing template

3° you need IPservices to be able to do PBR, verify with sh version | i IOS

4° of course the exit interface must be a L3 interface so a routed port(no switchport) or a SVI( int vlan)

Regards.

Alain

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Sheraiz Ahmad · ‎12-04-2012

I have all the requirements as per above.

The port on the switch where the router connects is a no switch port and I have given the IP, and router is directly connected to that port.

Just not sure where data cannot go to second router.

Raju Sekharan · ‎12-03-2012

Can you paste the show ip route for the next-hop IPs you have configured on policy-map

Raju

Sheraiz Ahmad · ‎12-04-2012

Thank for your Email. The template that I have on the 3750 is Desktop Routing and version is 15.0 (0) SE.

I think the routing is working as I have the below :

route-map newisp permit 10

match ip address 120

set ip next-hop 172.20.20.2

!

Gateway of last resort is 192.168.100.1 to network 0.0.0.0

S* 0.0.0.0/0 [1/0] via 192.168.100.1

172.20.0.0/16 is variably subnetted, 12 subnets, 2 masks

C 172.20.10.0/24 is directly connected, Vlan110

L 172.20.10.1/32 is directly connected, Vlan110

C 172.20.20.0/24 is directly connected, Vlan120

L 172.20.20.1/32 is directly connected, Vlan120

C 172.20.30.0/24 is directly connected, Vlan130

L 172.20.30.1/32 is directly connected, Vlan130

C 172.20.40.0/24 is directly connected, Vlan140

L 172.20.40.1/32 is directly connected, Vlan140

C 172.20.50.0/24 is directly connected, Vlan150

L 172.20.50.1/32 is directly connected, Vlan150

--More--

003201: *Mar 1 23:59:57.542: %SEC-6-IPACCESSLOGDP: list 100 denied icmp 172.20.

20.80 -> 192.168.171.30 (3/3), 1 packet

C 172.20.60.0/24 is directly connected, Vlan180

L 172.20.60.1/32 is directly connected, Vlan180

192.168.10.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.10.0/24 is directly connected, Vlan10

L 192.168.10.1/32 is directly connected, Vlan10

192.168.20.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.20.0/24 is directly connected, Vlan20

L 192.168.20.1/32 is directly connected, Vlan20

C 192.168.28.0/22 is directly connected, Vlan30

192.168.30.0/32 is subnetted, 1 subnets

L 192.168.30.1 is directly connected, Vlan30

192.168.40.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.40.0/24 is directly connected, Vlan40

L 192.168.40.1/32 is directly connected, Vlan40

192.168.50.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.50.0/24 is directly connected, Vlan50

L 192.168.50.1/32 is directly connected, Vlan50

192.168.60.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.60.0/24 is directly connected, Vlan60

L 192.168.60.1/32 is directly connected, Vlan60

192.168.70.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.70.0/24 is directly connected, Vlan70

L 192.168.70.1/32 is directly connected, Vlan70

192.168.80.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.80.0/24 is directly connected, Vlan80

L 192.168.80.1/32 is directly connected, Vlan80

192.168.90.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.90.0/24 is directly connected, Vlan90

L 192.168.90.1/32 is directly connected, Vlan90

192.168.100.0/24 is variably subnetted, 2 subnets, 2 masks

C 192.168.100.0/24 is directly connected, GigabitEthernet2/0/35

L 192.168.100.2/32 is directly connected, GigabitEthernet2/0/35

C 192.168.168.0/22 is directly connected, Vlan1

192.168.168.0/32 is subnetted, 1 subnets

L 192.168.168.168 is directly connected, Vlan1

cadet alain · ‎12-04-2012

Hi,

what is the result of a traceroute on a host from each subnet ?

Regards.

Alain

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Sheraiz Ahmad · ‎12-04-2012

Hi

I can ping and run the tracert, but I cannot get the Internet data.

I can ping the switch port - which connect to the Router..but I cannot get to the router..

cadet alain · ‎12-04-2012

Hi,

what do you mean i can't get the internet data? so you can ping and traceroute to 8.8.8.8 but cannot get a web page( either by name or by IP) ?

Regards.

Alain

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Sheraiz Ahmad · ‎12-05-2012

My Route Map is Set, but I get ping google.com..

Even tracert does not work.

My switch port ip is 192.168.200.2 - 255.255.255.0

and the Router is 192.168.200.10/24

pbr is enable and route Map is applied to the int Vlan180.

I cannot get access to any Data. and when I apply the Ip policy I get the following error : ""PLATFORM PBR 3 UNSUPPORTED RMAP : Route Map kddi not supported for PBR..""

Please advise.

Thank you