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Cisco SG200-50 Switch with Cisco 1751 Router

rodriguezja1974
Level 1
Level 1

I just recently bought a Cisco Small Business SG 200-50 switch that supports 802.1Q. I have an older Cisco 1751 router that I've setup temporarily as the router to route VLAN traffic.

I am unable to route VLANs for some reason (I've created subinterfaces on the router and

f0/0.1

encapsulation dot1q 1 native

ip address 10.0.0.0 255.255.255.0

f0/0.2

encapsulation dot1q 2

ip address 192.168.100.0 255.255.255.0

I've setup port 1 on the SG 200-50 switch as the trunk port with PVID of 1 allowing tagged traffic. I am unable to route traffic this way--I am also unable to reach the router from a node this way. When I change the port to have th PVID of 1 and change the traffic to untagged then I am able to reach the router from the 10.0.0.0 network and able to ping all the way to the f0/0.2 interface of the router but I am not able to route past that interface.

Nodes that are on the 192.168.100.x are connected to ports on the switch that are set to VLAN ID of 2 and ports that are set to Access mode.

I am hoping someone out there has had experience with this as there is not CLI on this particular switch so it is a bit difficult to configure as I am used to the CLI.

Any help is appreciated. Thanks!

PJ

1 Reply 1

Reza Sharifi
Hall of Fame
Hall of Fame

PJ,

Can you change this config

f0/0.1

encapsulation dot1q 1 native

ip address 10.0.0.0 255.255.255.0

to

f0/0.3

encapsulation dot1q 3

ip address 10.0.0.0 255.255.255.0

I am not familiar with SG200, but is there any way for you to just do 802.1Q on the uplink port to the router and allow all vlans for now?

If you have to specify vlans try vlan 2 and 3

HTH

Reza