Routing with Cisco 3550 only 1

[hswipf]

Using a 3550 as a router/switch with 2900XLs. LAN is isolated with no connections except the 3 subnets I need to route between. We have set up VLANS for each of the subnets but are not sure how to config static routes. They are all contiguous subnets and have SM of 255.255.255.0. We can't ping across subnets. What are we missing? TIA

 

[jpm121]

Turn on IP routing with the commend "ip routing".

You've added the VLANS on the 3550 right?

Then, if you need to, use the normal "ip route ..." commands, just like on a normal router.

 

[vipergg]

If you have configured the layer3 SVI's and put your ports into the correct vlans and just implemented the ip routing command that is all that is needed . The 3550 will then know about any "connected routes" , subnets that are defined on the 3550 and nothing else is needed to route between them.

 

[hswipf]

We did turn on routing and tried various ip route commands but may not be understanding how to do them. The examples we've seen show a separate router that connects the LAN to a WAN. We don't want to do that. We have some ports on vlans/subnets a,b or c while the two gbit ports connect to vlan/subnets b & c.

 

[vipergg]

The 3550 is a layer2/3 device which means it can route between vlans . should look like something below as an example . You should be able to route between devices in these two vlans . the 2900's would then be hung off those 2 switchports . If you wanted mutliple vlans on each 2900 you would use a trunk link down to the 2900's which is not shown.

conf t.
ip routing

vlan 65

vlan 64



int vlan 65
192.168.65.254 255.255.255.0

int vlan 64
ip address 192.168.64.254 255.255.255.0


interface f1/2
switchport
switchport access vlan 65


interface f1/3 s
switchport
switchport access vlan 64

 

[vipergg]

Here is a updated , slight mistake in config that I fixed.

conf t.
ip routing

vlan 65

vlan 64



int vlan 65
ip address 192.168.65.254 255.255.255.0

int vlan 64
ip address 192.168.64.254 255.255.255.0


interface f1/2
switchport
switchport access vlan 65


interface f1/3 s
switchport
switchport access vlan 64

 

[hswipf]

Thanks - we kept trying to set the default route to itself since we didn't have a WAN connection.