Trunk/Accessports on RB1100AHx2

ste · January 16, 2012, 4:22pm

Hi,

I tried the trunking example from wiki to make a trunk-port and 3
Accessports on RB1100AHx2 (Atheros 8327).

There is no vlan-header= Command and Switch-Rules cant change vlan-id.

So it is not possible to do trunking/untrunking with switch hardware of RB1100AHx2?
So I’ve to use CPU for this job?

Thanx,
Stefan

Feklar · January 17, 2012, 4:26pm

The routerboard is a router not a switch. It does not have any concepts of a tagged or untagged port. When adding a VLAN to an interface, it treats it just like any other routed interface. You can duplicate some of the functions of a switch via software with a bridge, but you won’t necessarily wirespeed throughput and it does not scale very well. It’s being done in software instead of hardware.

If you want to duplicate the functionality set up your VLANs and add them all to a bridge. Set the horizon on each VLAN bridge port to the same value so they cannot talk over the bridge and that will be your “tagged” port. For your “untagged” port add another physical interface to the same bridge. Note that you cannot add the physical interface the VLANs are to the same bridge, that will break it.

ste · January 17, 2012, 8:32pm

Feklar:

The routerboard is a router not a switch. It does not have any concepts of a tagged or untagged port. When adding a VLAN to an interface, it treats it just like any other routed interface. You can duplicate some of the functions of a switch via software with a bridge, but you won’t necessarily wirespeed throughput and it does not scale very well. It’s being done in software instead of hardware.

If you want to duplicate the functionality set up your VLANs and add them all to a bridge. Set the horizon on each VLAN bridge port to the same value so they cannot talk over the bridge and that will be your “tagged” port. For your “untagged” port add another physical interface to the same bridge. Note that you cannot add the physical interface the VLANs are to the same bridge, that will break it.

You’re wrong. Some included atheros chips do tagging/untagging: http://wiki.mikrotik.com/wiki/Manual:Switch_Chip_Features
The chip in 1100ahx2 seems to be less capable.