[c-nsp] cisco ios dhcp server - option 60 assistance needed

[Peter Rathlev]

On Wed, 2016-08-31 at 18:03 -0500, Aaron wrote:
> I'm trying to use option 60 for stirring an avaya ip phone into a
> certain
> dhcp pool.  Not working. 
> 
> I want the avaya phone to get ip's from the vlan-phones pool below
> (10.0.16.0/22) but it won't

How are the two subnets configured? Are they on the same interface or
different interfaces? What does Fa0/1.4051 look like?

If they're on the same interface, one of them being secondary, then the
IOS DHCP process will by default assign dynamic leases from the primary
net. Only is there are no free leases will the pool belonging to the
secondaty network come in to play.

If they're on different interfaces then the client of course cannot
receive (and use) an address from the "other" interface.

> ip dhcp pool cc-vlan-phones
>    network 10.0.16.0 255.255.252.0
>    default-router 10.0.16.1
>    dns-server 10.0.0.17 10.0.0.18 10.0.0.23
>    option 242 ascii "MCIPADD=10.0.2.50,MCPORT=1719,HTTPSRVR=10.0.2.50"
>    option 60 hex 6363.702e.6176.6179.612e.636f.6d

This just sets an option 60 for the client to receive, it does not
select on a client supplied option 60.

As far as I know you can only select clients based on the ethernet
address or a client-identifier in Cisco IOS.

-- 
Peter