Cisco 2951 with EHWIC

[blhoskins]

Hello all,

We have a Cisco 2951 Router that has 2 EHWIC-1GE-SFP-CU cards installed and 1 24 port switch module.  On the 24 port switch module we have several VLAN's and interface VLAN's routing the data between them.  The question we have is whether or not it is possible to trunk the VLAN data from the 24 port switch module up to the router and out out the EHWIC cards.  We have tried various configurations including VTP but if a host is connected in VLAN x on the switch as an access port and it attempting to connect to another LAN utilizing the EHWIC card then the data does not pass out that interface. 

Any help with the configuration would be much appreciated.

-B

[Masoud Pourshabanian]

Hello,

I do not have 2951 to test, but I think it is possible. As I remember, switching module has two interfaces connected to router.

Interface 0/26 on switch <---> interface x/0 on your router.  [find X on your router]

interface 0/25 on switch<----> interface x/1 on router.

You need to configure an IP on Interface 0/26 and another IP in the same range on interface x/0.

interface 0/25 [on switch]

switchport mode trunk

interface x/1[on router]

switchport mode trunk

interface [EHWIC-1GE-SFP-CU on router]

switchport mode trunk

Then you connect EHWIC-1GE-SFP-CU to an external switch or router to pass your VLAN.

Have you tried this?

Masoud

[blhoskins]

Thanks for the response.  I have the IP address setup between the router and the embedded switch so that I can ssh and such between them .  I have tried setting the 0/25 port on the switch module as a trunk and at the EHWIC there is not an option to make it be a trunk.  

-B

[Masoud Pourshabanian]

You are right. I checked EHWIC-1GE-SFP-CU. It is a routed interface. I do not think you are able to extend your VLAN through HWIC. If you want to extend VLAN, you can connect switching module directly to another switch. It would be more helpful if you explain more about what you are trying to do.

Masoud

[blhoskins]

We want hosts on Vlan XX located on the switch module to be able to communicate with another switch outside the router that hosts the same VLAN.  It used to be just 2 switch but management in their infinite wisdom purchased the router.  The current switch module inside the router is 24 ports and is maxed out so we thought maybe we could trunk the VLAN up through the router interface EHWIC but it appears that it wont pass the VLAN in that manner unless I am missing something.

-B

[Masoud Pourshabanian]

I am not sure it works with switchports or not.

Can you configure bride-group on your router?

try this configuration,

int 0/25 [on switch]

trunk

****

 bridge 1 protocol ieee [ router]

int x/1 [router]

bridge-group 1

int HWIC[router]

beridge-group1

And connect HWIC to another switch and make the other side also trunk.

Masoud

[blhoskins]

I will give this a try tomorrow and let you know how it works out.  Thanks for the response and assistance.

-B

[Philip D'Ath]

This is not going to work.  There is not a layer 2 connection inside of the router to allow the frames to be moved from a switch module to a layer 3 module.