Trunk between HP and 3COM

[mvanrijsten]

Hi,

In our network we are working mainly with 3com switches, 4200 and 4800 series. Now since these are no longer available and we needed to expand, we have bought a HP Switch 2520-24-PoE(J9138A). Now we are using several VLANs in our network but i am having trouble with configuring the HP switch with a trunk to our 3com switches so we can use all the VLANs on our HP switches as well.

Can anybody help me how i need to configure the ports so trunking works on both switches?

[Richard Litchfield]

Set up a bridge-aggregation group on the 3com switches (make sure it is dynamic)

Set up a port trunk on the ProCurve switches, eg

trunk 23-24 trk1 lacp

Then match up the VLANs (or run GVRP)

[Vince_Whirlwind]

On the 3COM your interface will have something like:

    port link-type trunk
    port trunk permit vlan 1 101 126 150 201 249

And on the procurve

    vlan 1 untag Trk1

    vlan 20 tag Trk1

    vlan 30 tag Trk1

etc...

For the link aggregation, I couldn't get LACP working with my Commware7 switches, so I went with:

port link-aggregation group 101

&

trunk A21,B1 Trk1 Trunk

[Vince_Whirlwind]

er....except you make the VLANs match up with each other, as opposed to what I have done just there...