Catalyst 2924C-XL and HP Procurve 2626 trunking probs

[moosie_au]

I have a catalyst 2924C-XL and a HP procurve 2626, problem is I cant get them to trunk properly together, I have Cdp running and both see each other via this but am unable to ping or anything past this. PLEASE HELP!!, are there any underlying probs with the interoperability between these switches?

[shaun.oliver]

One obvious point is to make sure you're using 802.1q (dot1q) trunks on the Cisco switch, rather than ISL.

[moosie_au]

I have 802.1Q running on the cisco, and have 3 other cisco switches successfully trunked to the existing cisco...but only seem to have probs with the HP procurve

[milan.kulik]

Hi,

you need

switchport trunk encapsulation dot1q

switchport mode trunk

on the Cisco intefrace.

Check in HP documetation if it supports native VLAN (VLAN1 on Cisco by default) feature.

I don't know the HP command syntax, but you need to configure 802.1q trunk, no negotiation, native VLAN1 on the HP side, too.

Regards,

Milan

[aashish.c · Accepted solution]

Hi,

I would like to tell you that "Trunking" means different on cisco and HP switches.

On HP, Trunking means bundling the channels and inturn this tech. on Cisco means fastetherchannel. You can enable Dot1q on HP switches as well. HP switches comes with ASCII character based menu options interface.

On Cisco 2924C-XL, you can also enable dot1q. Older 2900xl switches which ahve 4MB flash, dont support dot1q trunking. I`m sure u might not be having 4MB switch.

If you are doing trunking on HP then do the etherchanneling between them.

Regards

aashish C

[moosie_au]

On cisco i have:

int fa0/4

full duplex

speed 100

switchport trunk encaps dot1q

switchport mode trunk

on HP i have:

cdp run

int eth 23

speed duplex 100 full

no lacp

trunk 23 trk1 FEC

When I do Show cdp neighbor they can see each others mac address only the cisco shows that the HP is just a switch and not a Trans bridge. The HP shows the cisco as a Bridge switch.

Please HELP!!

[moosie_au]

I have solved this problem, on the Cisco the trunking is needed however on the HP you dont need to trunk, all i did was tag ethernet 23 in the default vlan and also the other vlans which i had configured. I ran Gvrp on the HP and did a show arp, it could then see the cisco ip address, also did show mac-address for each vlan and it picked them up also. I then did the same from the cisco and all worked. I tested it with one vlan which is running a dhcp server on it and was able to obtain an address from it. Just added in all the vlans after this and made sure that ethernet 23 was tagged in all of the vlans. All worked. Only problem is i have more than one cisco and the HP cannot join the cluster.

[aashish.c]

Hi,

CMS is proprietary software of cisco and you will not be able to view any other vendor switches in CMS cluster.

regards

aashish C