From: boby2kusa@hotmail.com
Date: Thu Aug 28 2003 - 13:55:02 GMT-3
several things:
IRB is not supported in 3550, it does not makes sense to do so when vlan
will do the job. the only reason you'll bridge here is you have a
non-roueable protocol. IP is routable.
This kind of repeat what I already said above but With fallback bridging,
the switch bridges together two or more VLANs or routed ports, essentially
connecting multiple VLANs within one bridge domain. Fallback bridging
forwards traffic that the switch does not route and forwards traffic
belonging to a nonroutable protocol such as DECnet or IPX in this case since
3550 does not support IPX.
----- Original Message -----
From: "Larry Cain" <l_u_cain@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Thursday, August 28, 2003 5:21 AM
Subject: 3550 VLAN bridging
> Hi All
>
> My lab requirement is connect to VLANs A & B together but not by routing.
> Is Fallback Bridging the way to go?
> Or should IRB be used?
> Or are they the same thing?
>
> VLAN A does not have an IP address, but B does - it is the management
Vlan.
>
> r1---VlanA(2)------f0/1 Switch f0/2-----VlanB(3)-----Host
> 10.1.1.1 10.1.1.250 10.1.1.2
>
> What do think of the following config.
>
> Switch(config)# bridge 10 protocol vlan-bridge
> Switch(config)# vlan 2 name VlanA
> Switch(config)# vlan 3 name VlanB
> Switch(config-vlan)# exit
> Switch(config)# interface vlan2
> Switch(config-if)# exit
> Switch(config)# interface fastethernet0/1
> Switch(config-if)# switchport mode access
> Switch(config-if)# switchport access vlan 2
> Switch(config-if)# no switchport
> Switch(config-if)# bridge-group 10
> Switch(config)# interface fastethernet0/2
> Switch(config-if)# switchport mode access
> Switch(config-if)# switchport access vlan 3
> Switch(config-if)# no switchport
> Switch(config-if)# bridge-group 10
>
> Is there too many lines? not enough?
> If there were 5 ports in each VLAN would I need to repeat the last 5 lines
> for each specfic interface?
>
>
> Many thanks
> Larry
>
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