Wild stab in the dark here but is the phone in a separate vlan?
John
On Wed, 2006-05-24 at 09:55 -0400, Julian Dunn wrote:
> I'm trying to boot a Cisco 7960 from an ISC DHCPD server (3.0.3 on
> FreeBSD 4.11), so far unsuccessful, and getting some odd behaviour on
> the wire. I wonder if anyone has done this before and therefore can
> validate whether or not the traffic I am seeing is normal.
>
> I have dhcpd.conf set up like this
>
> ---8<--- cut here ---8<---
>
> option cisco-etherboot-server code 150 = ip-address; .
> .
> .
> host c7960 {
> hardware ethernet 00:16:46:9B:6D:62;
> fixed-address 192.168.5.14;
> option host-name "c7960.acf.aquezada.com";
> option cisco-etherboot-server 192.168.5.7; }
>
> ---8<--- cut here ---8<---
>
> I'm deliberately using option 150 instead of "option tftp-server"
> because this is what works on the Windows end (and in any case I tried
> "tftp-server" and it didn't work anyway)
>
> On the wire what happens is this, after I power on the phone
>
> * Bunch of CDP traffic from phone
> * DHCP Discover from phone, asking for:
> - Subnet Mask
> - TFTP Server Name
> - Domain Name Server
> - Router
> - Option 150
> - ARP Cache Timeout
> * DHCP Offer from DHCP server
> * DHCP Request from phone
> * DHCP ACK from DHCP server
> * Phone does gratuitous ARP for the IP it just got
> * Phone does ARP who-has for default router. No ARP response on the
> wire.
> * Phone does ARP who-has for DNS server. No ARP response on the wire.
> * After a while, cycle starts over
>
> The part I can't figure out is, are the last two items normal? What
> would prevent the default router and DNS server from providing an ARP
> reply? I should note that immediately after the phone receives its IP,
> one can still not ping it.
>
> Any ideas or suggestions?
>
> - Julian
>
> --
> Julian C. Dunn, P.Eng.
> Systems Administrator
>
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--
John Lange
OpenIT ltd. www.Open-IT.ca (204) 885 0872
VoIP, Web services, Linux Consulting, Server Co-Location
