Your other option if you don't want to run a DHCP server outside of the
switches is to run the remote arp sensor on a box attached to the switch
(Ive never tried it), or setup a mirror port and mirror traffic to PF.
I really don't know if the dhcp relay will work with the dhcp server
enabled. Id guess not.
Chicken scratch network diagram would be helpful.
But seriously.. Look into running a couple central DHCP servers.. much
easier to maintain in the long run (IMHO).
On Thu, May 14, 2015 at 11:21 AM, Derek Wuelfrath <[email protected]>
wrote:
> Hello Boris,
>
> Most of the time, iphelpers are doing the job. Can you explain what is
> ‘not working’ ?
>
> In your current setup, the DHCP server is running on the switch at the
> edge or is it on a ‘core switch’ ? Let’s say you have 3 access switches,
> connected back to one core switch, but doing L3 (VLANs stays at the access
> switches level). DHCP server is on the access switches or on the core
> switch ?
>
> The things is, I’m unsure if, when the DHCP server running on the same
> switch where the VLAN is ending (L2 connectivity), iphelpers can do the job.
>
> If you can share a network design, that’d be great… I guess… ;)
>
> (Sorry if it was part of a previous discussion, I clicked the link which
> was leading me to another previous conversation, which was also leading me
> to another discussion… I’ve been lost in the Matrix while trying to figure
> out which conversation was the initial one!)
>
> Cheers!
> dw.
>
> --
> Derek Wuelfrath
> [email protected] :: +1.514.447.4918 (x110) :: +1.866.353.6153 (x110)
> Inverse inc. (www.inverse.ca) :: Leaders behind SOGo (www.sogo.nu) and
> PacketFence (www.packetfence.org)
>
> On May 14, 2015 at 06:12:01, Boris Epstein ([email protected]) wrote:
>
> Hello all,
>
> I have raised the issue previously:
>
>
> http://www.mail-archive.com/packetfence-users%40lists.sourceforge.net/msg08765.html
>
> Basically, the issue is that I am trying to run a DHCP server on my Cisco
> IOS (Catalyst) switches while I run my PF server that only has IP
> connectivity to them (no VLAN connectivity as VLAN's are local to the
> switches).
>
> The setup requires that IP update/status info for all nodes be
> communicated back to the PF server. That is not happening for some reason -
> at least not via the Cisco's "ip helper-address" mechanism.
>
> So the question fundamentally is - how do I do that? What implementations
> do any of you have out there that accomplish it? Sounds like some people
> have DHCP servers separate from PF and switches. OK, that is an idea. What
> other implementations are out there?
>
> If you don't mind sharing that I will be very thankful.
>
> Cheers,
>
> Boris.
>
>
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