Posted on 2005-08-19 10:59:03, modified on 2006-01-09 16:29:23
Tags: Voice over IP, DHCP, Alcatel
My Alcatel Premium e-reflexes voice-over-IP phone (best VoIP phone I've encountered, besides the fact that it is a non-SIP non-open protocol device) suddenly stopped worked after an upgrade from the ISC dhcpd 3.0.1r14 (yes yes) to version 3.0.3. The error was (very descriptive): Error 2.02
The cause was this change in the ISC DHCP server:
The siaddr field was being improperly set to the server-identifier when responding to DHCP messages. RFC2131 clarified the siaddr field as meaning the 'next server in the bootstrap process', eg a tftp server. The siaddr field is now left zeroed unless next-server is configured.
And according to the output of dhcpdump(1), that was indeed the case:
TIME: 10:30:13.000930 | TIME: 10:32:31.001894
IP: 192.168.1.1.67 (00:50:8b:b9:2 IP: 192.168.1.1.67 (00:50:8b:b9:2
OP: 2 (BOOTPREPLY) OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet) HTYPE: 1 (Ethernet)
HLEN: 6 HLEN: 6
HOPS: 0 HOPS: 0
XID: 7db4fce1 XID: 7db4fce1
SECS: 0 SECS: 0
FLAGS: 0 FLAGS: 0
CIADDR: 0.0.0.0 CIADDR: 0.0.0.0
YIADDR: 192.168.2.249 YIADDR: 192.168.2.249
SIADDR: 192.168.1.1 | SIADDR: 0.0.0.0
GIADDR: 0.0.0.0 GIADDR: 0.0.0.0
CHADDR: 00:80:9f:54:50:a3:00:00:00:00 CHADDR: 00:80:9f:54:50:a3:00:00:00:00
SNAME: . SNAME: .
FNAME: . FNAME: .
OPTION: 53 ( 1) DHCP message type OPTION: 53 ( 1) DHCP message type
OPTION: 54 ( 4) Server identifier OPTION: 54 ( 4) Server identifier
OPTION: 51 ( 4) IP address leasetim OPTION: 51 ( 4) IP address leasetim
OPTION: 1 ( 4) Subnet mask OPTION: 1 ( 4) Subnet mask
OPTION: 3 ( 4) Routers OPTION: 3 ( 4) Routers
OPTION: 43 ( 15) Vendor specific inf OPTION: 43 ( 15) Vendor specific inf
OPTION: 58 ( 4) T1 OPTION: 58 ( 4) T1
OPTION: 59 ( 4) T2 OPTION: 59 ( 4) T2
OPTION: 66 ( 13) TFTP server name OPTION: 66 ( 13) TFTP server name
OPTION: 67 ( 9) Bootfile name OPTION: 67 ( 9) Bootfile name
My dhcpd entry for these phones now looks like:
class "ipphone" {
match if option vendor-class-identifier = "alcatel.tsc-ip.0";
option dhcp-parameter-request-list 1,3,28,43,54,58,59,60,66,67;
option vendor-encapsulated-options "alcatel.a4400.0";
option tftp-server-name "10.192.13.10";
next-server 10.192.13.10;
option bootfile-name "ST_JAMES";
}and every phone here is happy again!
| Share on Facebook | Share on Twitter