Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

3750 vlan ip routing

hi all

I´m using a catalyst 3750. First i defined 2 vlans, wich were assigned in the next order.

-vlan 2 using port 3

-vlan 3 using port 5

After that i made a vlan interface (SVI) of vlan 2 and 3, with the next ip address --vlan 2

- vlan 3

My ethernet card is configured with the ip /16 son i can send mesages to both ports of the switch.

when i conected my pc with the port 3 of the switch and ping after that there was response.

Then i disconected and conected it again but on the port 5 and ping obviusly there was response again. Just there everything was ok

But when i ping conected on port 5 theres was no response. Then i type in the conf t "ip routing" because it was disabled and I thougth that was the problem but it wasn´t, it got worst.

Because I tried to ping on the port 5 which used to response and there was no response any more with the ip routing enable.

I would like if someone could explain the last and how I could enable ip routing between vlans and be sure that it works with only one ethernet card in my computer ?



Re: 3750 vlan ip routing

Your problem is a mismatch in your subnet masks. With IP routing enabled, your ping to arrives at port 5, but the 3750 has no route (that you have described, anyway) to If it does have a route to that address, it is certainly not on port 5, which has the address You need to have your PC's address and mask be consistent with the 3750's interface that you are connected to, or the 3750 will not always find your PC.



CreatePlease to create content