Route between 4510 and 3750

[paulc]

I am trying to set up a route and have the following routes (core 4510, edge 3750) (pertinent data in bold):

On the 4510 a show ip route:

     172.18.0.0/24 is subnetted, 2 subnets

C       172.18.2.0 is directly connected, Vlan182

C       172.18.1.0 is directly connected, Vlan15

     172.20.0.0/16 is variably subnetted, 3 subnets, 2 masks

C       172.20.4.4/30 is directly connected, GigabitEthernet9/2

C       172.20.3.0/24 is directly connected, Vlan10

C       172.20.4.0/30 is directly connected, GigabitEthernet9/1

     172.30.0.0/24 is subnetted, 1 subnets

S       172.30.3.0 [1/0] via 172.20.4.2

S*   0.0.0.0/0 [1/0] via 192.168.100.9

C    192.168.0.0/16 is directly connected, Vlan1

On the 3750:

     172.16.0.0/24 is subnetted, 1 subnets

C       172.16.66.0 is directly connected, Vlan12

     172.20.0.0/16 is variably subnetted, 3 subnets, 2 masks

C       172.20.4.4/30 is directly connected, GigabitEthernet2/0/28

C       172.20.3.0/24 is directly connected, Vlan10

C       172.20.4.0/30 is directly connected, GigabitEthernet1/0/28

The two Gigabit ports are fiber attched to the 4510.

I can ping the 172.20.4.2 successfully but I cannot ping 172.20.3.1.  Can someone point out where I may be missing or mis-configured a line?

Thank you.

[Reza Sharifi]

cannot ping 172.20.3.1

Is vlan 10 in up and up mode?

Did you configure SVIs on both switches?

can you provide relevant configs from both switches

[Jon Marshall]

Where exactly are you pinging from ie. what IP address ?

Do you have any access-lists on the interfaces ?

What is 172.20.3.1 ie. is it the 4510 or the 3750 ?

Where is the device you are pinging from connected ?

Jon

[paulc]

Sorry, this is the 4510 route (no vlan10 listed):

    172.18.0.0/24 is subnetted, 2 subnets

C       172.18.2.0 is directly connected, Vlan182

C       172.18.1.0 is directly connected, Vlan15

     172.20.0.0/30 is subnetted, 2 subnets

C       172.20.4.4 is directly connected, GigabitEthernet9/2

C       172.20.4.0 is directly connected, GigabitEthernet9/1

     172.30.0.0/24 is subnetted, 1 subnets

S       172.30.3.0 [1/0] via 172.20.4.2

S*   0.0.0.0/0 [1/0] via 192.168.100.9

C    192.168.0.0/16 is directly connected, Vlan1

I tried pinging from 192.168.100.1 to 172.30.3.1 (the 3750). IP of the 4510 is 192.168.103.6

[Jon Marshall · Accepted solution]

Paul

There is no route for 192.168.100.x network on the 3750 so the 3750 will be unable to respond to the ping. You need to the 3750 to get a route for 192.168.100.x.

Jon

[paulc]

Thank you, John.  Boy, that was a silly miss on my part.