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PilMan

2 Posts

11618

July 11th, 2006 20:00

VLAN Trunk on 2724

We are thinking of getting a few 2724 powerconnect switches to use in a test network. The plan is to have one switch in each building with fiber connect them together. Each switch would have to have 3 seperate vlans that would match the other. The Vlans do not need to talk with each other, but VLAN 1 on switchA would need to talk with VLAN 1 on switchB. Will the 2724 work and how do you config the trunk port?

Thanks

PilMan

2 Posts

July 13th, 2006 13:00

Thanks for the response. Just to clarify I can have ports 1 to 8 in VLAN 10, 9 to 15 in VLAN 20, 16 to 22 in VLAN 30 and Port 24 in VLAN's 10,20 and 30. Thus making port 24 the Trunk

DELL-Cuong N.

1K Posts

July 13th, 2006 13:00

Yes.  That's correct :-).  The other ports would be setup in "access" mode.

Access is defined as:

  • Port member of only one VLAN.
  • port only accept untagged traffic and will put this traffic on the VLAN to which the port is a member.
  • port will only egress untagged traffic.

Cuong.

DELL-Cuong N.

1K Posts

July 13th, 2006 13:00

Normally VLAN 1 is for management and is not sent tagged between the switches but you can have all untagged traffic between the switches be on VLAN 1 and have VLAN 1 be sent untagged between the switches on the trunk (all the other VLANs on the trunk would be tagged of course).

The 2724 supports web configuration so there is no explicit "trunk" mode on the web screen however you can configure a VLAN trunk port easily enough.  A VLAN trunk by definition is simply:

  • A member of more then one VLAN.
  • Will only egress tagged traffic.
  • Will only accept tagged traffic from VLAN to which the port is also a member.
  • Does not accept untagged traffic.

You can configure the 2724 with all these options.  Additionally eventhough typically a trunk port does not accept untagged traffic, if you still want to have VLAN 1 between the switches then you will need to allow untagged traffic on this port so you really need to use a "general" port mode (basically a hybrid between trunk and access VLAN port) which is also possible to setup on the 2724.

Cuong.

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