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Help needed to configure VLAN in 3com

Posted on 2009-05-17
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Last Modified: 2012-05-07
Hi, I have three wireless bridge connections goes to a 3com Switch (baseline 2226Plus, It supports VLAN). From this switch a connection goes to a cisco router. The above 3 bridges are from different networks of remote offices. I need to know how to create VLAN in this switch. So far, I have done this:
Port 1-4 assigned to VLAN ID 9 (intented for Bridge 1),
Port 5-8 assigned to VLAN ID 10 (intended for Bridge 2) .
Port 9-12 assigned to VLAN ID 11 (intended for bridge 3)
The remaining ports can be used to connected to the router. Now I want to know how to get the above 3 bridges communicate with  the router port. I am confused with the tagged/untagged term. Please help where should i use tag and untag until fulfil this scenario.

Thanks for your help..

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Question by:Basheerpt
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ccsistaff earned 260 total points
ID: 24406649
The port connected to the router needs to be of type Trunk.  Trunk ports allow traffic from all VLANs to traverse it.  The trunk port needs to have tagging enabled to separate VLAN traffic and send traffic back to the right place.  It is referred to in Cisco as dot1q, which is a VLAN tagging protocol.  The router will also need to have three subinterfaces configured each with an IP address in the range of each bridge to be used as a gateway.  Each subinterface will be configured to be member to a particular VLAN on the switch with the commands:

interface FastEthernet0/1.9
description Sub-Interface for VLAN 9 on the 3com Switch
ip address 192.168.0.1 255.255.255.0
encapsulation dot1q 9
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by:Basheerpt
ID: 24409261
Thanks for the reply, the Trunk means the same as Link aggregation trunk?
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by:Basheerpt
ID: 24420658
There is no option like TRUNKING, all that i can see is tagged or untagged.
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Assisted Solution

by:apd32123
apd32123 earned 240 total points
ID: 24479897
Untagged = native vlan in the cisco world.  Lets say for example on your Cisco switch you have vlans 1-20 with vlan 1 as native.  On the 3com you will want to make vlan 1 untagged and vlans 2-20 tagged.
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Author Closing Comment

by:Basheerpt
ID: 31582362
Thanks a lot. I have done the configuration..
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