Connecting Vlans ? - 3750 to Baystack 450-24T

[chazk1]

I have a Cisco core (dual 3750 switches) which have user vlans configured. Lets say VLAN 10 and VLAN 20

I have a number of Nortel BayStack 450-24T switches (access switches)which are to be used by client PCs.

How do I configure the Baystack ports to become members of the correct VLAN.

Where VLANs are concerned, is there any special configuration needed for the Cisco or Nortel ports connecting the two switches ? How do I configure the Cisco end ? How do I configure the uplink port at the Nortel end ?

How do I then configure each port on the Baystack to access either VLAN10 or VLAN20 ?

Is there any good documentation out there on this subject ?

 

[krr]

On the Cisco, configure the interface connected to the BayStack as static dot1q trunk. Something like

switchport trunk encapsulation dot1q
switchport mode trunk
switchport nonegotiate

On the BayStack, create VLANs with the same ID's as on the Cisco (10 and 20 in your example). In the Port VLAN Configuration select the uplink port to the Cisco and set it to 'tagged' for VLANs 10 and 20. (VLAN 1 remains untagged, this corresponds to Cisco's 'Native VLAN'). To configure a port into a certain VLAN, set it to 'untagged' for this VLAN. (The 'untagged' for VLAN 1 will be removed automatically, since a port can only be 'untagged' in one VLAN).

Cisco hides much of the complexity of VLANs by their concept of 'trunk' and 'access' ports, which makes it easier to configure. On the other hand, you never know how it really works. When one, like me, has learned the VLAN thing from the ground up and understands 802.1Q tagging, it is easier to understand what Nortel and others do. BTW, the BayStack 450 manual has a very good chapter on VLANs. This is, how it works. The hard part is, to transfer this to Cisco terminology.

Cheers *Rob

 

[chazk1]

Thanks Rob.

It all seems pretty clear but I'm having problem with the uplink port. This is port 1 on the BayStack.

I create the VLANs 10 and 20. I go into 'VLAN Port Configuration' and here is what I see:

Port: [ 1 ]
Filter Tagged Frames: [ No ]
Filter Untagged Frames: [ No ]
Filter Unregistered Frames: [ No ]
Port Name: [ Port 1 ]
PVID: [ 1 ]
Port Priority: [ 0 ]
Tagging: [ Untagged Access ]

AutoPVID (all ports): [ Disabled ]

If I change the PVID to match the VLAN number 10 or 20 by pressing <spacebar> and then change the Tagging to 'Tagged Trunk'then Port 1 becomes a Tagged member of all VLANs.

What am I doing wrong as can't make uplink port (Port 1) an 'untagged' member of VLAN 1 ?

 

[bvance]

I'm trying to get a 2950 G to trunk through five 3com switches. Does anyone know if there are any "hidden" issues here? I will be setting up 2 vlans and a third for voip. At this point, I can on get one vlan to work at a time.