On Sat, 2009-06-13 at 09:01 -0400, Adam Greene wrote:
> A while back we experimented with trunking VLANs over a Mikrotik backhaul,
> and *at the same time* putting the Mikrotiks themselves into a tagged 802.1q
> management VLAN. We had major problems with that.
I just did this the other day. There are several possible scenarios that
you can do:
1. Straight passing of vlan tags (just simple layer2 bridge) where the
MT is not "participating" in any of the vlans. This is very easy, as
you said.
2. Passthrough of tagged traffic and the MT participates in one or more
vlans (management vlan for example). This, too, is fairly easy.
* Build the bridge to include the ports that will passthrough
traffic.
* Build a bridge to "host" the management vlan.
* Create a vlan on the passthrough bridge and add this vlan
interface to the "vlan host" bridge. DO NOT add the
management vlan as a port on the "passthrough bridge"
* managment IP address would be assigned to the "vlan host"
bridge
3. VLAN termination with trunked port. Simply add vlan interfaces on
the physical interface. IP addresses for each vlan would be assigned to
the vlan interfaces themselves. The physical interface would then be
equivalent to a Cisco "trunk" port. Each vlan is a "routing interface"
in this scenario.
4. VLAN participation where multiple ports participate in the vlan.
This is a bit more complex type of configuration and describing steps to
create this would be too difficult to do here in a "generic" fasion.
You can, of course, have combinations of all the above. The "trick"
with Mikrotik is a matter of creative use of bridges and vlans and
understanding traffic flow at layer 2.
--
********************************************************************
* Butch Evans * Professional Network Consultation*
* http://www.butchevans.com/ * Network Engineering *
* http://www.wispa.org/ * WISPA Board Member *
* http://blog.butchevans.com/ * Wired or Wireless Networks *
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