In order to get some information across to our VoIP phones, the DHCP server serves them an IP umber for a few minutes, after which they connect in a way independent from the DHCP server.
Lately, some VoIP phones don't get connected any more, as reflected by unknown client
lines in the DHCP logs.
Note | |
---|---|
The |
/etc/dhcp3/dhcpd.conf
Has been edited extensively lately, about a day prior to the first unknown client
s.
It now looks like:
shared-network MY-NET { #some options skipped for brevity" set vendor-string = option vendor-class-identifier; option NortelVoIPPhoneIdentifier code 128 = text; option NortelVoIPVLANIdentifier code 191 = text; class "VoIP" { match if option vendor-class-identifier = "Nortel-i2004-A"; } subnet 172.29.66.0 netmask 255.255.255.0 { authoritative; pool { allow members of "VoIP"; deny known-clients; option routers 172.29.66.1, 172.29.66.2; option NortelVoIPVLANIdentifier "VLAN-A:824."; range 172.29.66.10 172.29.66.240 default-lease-time 180; max-lease-time 300; } } #rest of file skipped