[c-nsp] Procurve DHCP relay question

[Steve Bertrand]

Eric Cables wrote:
> I'm in the middle of a transition from HP -> Cisco, with an HP 2848 as the
> "core", so sorry if this e-mail is off topic.  I am having a hard time
> getting DHCP relay to work, and was hoping someone with HP experience could
> chime in with some assistance.
> 
> I've created a new VLAN, and have specified a helper-address to point to a
> DHCP server that manages dozens of scopes.  The new VLAN functions fine,
> assuming users are given a static address, but DHCP does not appear to work
> at all.
> 
> To troubleshoot I pointed the helper-address to a system with Wireshark, but
> I don't see any requests coming in when a user on the new VLAN requests a
> new DHCP address, indicating that the request is not being forwarded
> properly.  Is there any debugging available on the procurve to troubleshoot
> this further?
> 
> I've read a number of documents describing how to configure DHCP relay on a
> procurve, and as far as I can tell the recommendations match my
> configuration.
> 
> Here are the features enabled on the 2848:
>  - 'ip routing' is enabled
>  - 'dhcp-relay' does not show in a 'show run', indicating it is enabled (the
> default)
>  - A 'ip helper-address x.x.x.x' statement is configured on the VLAN
> interface
>  - There is a route back to the destination helper-address
>  - Connectivity works on the VLAN in question, assuming users are statically
> configured

I've got a 'J4904A' HP ProCurve 2848 that I can do some quick testing
with...

Can you provide a 'sh run' from both units? Also specify what type of
Cisco you are running, and its version.

Is this simply a replacement of a switch you are trying to achieve?

Steve