DHCP option 184

[IanTomkins]

Regarding option 4 it is actually very straightforward the option works like this:

4

Number of bytes after this, so typically 6

4 Bytes of IP address of the emergency gateway

The emergency route number sequence, for example 9*

Note that the emergency route bytes are simply 0-9 for each digit but 170 for * (It's ascii code).

So for example the sequence for a gateway of 192.168.55.66 with a dialing sequence of 9* would be

4,6,192,168,55,66,9,170

In the event the emergency sequence is longer that two characters then the 6 needs to be adjusted accordingly.

[Justin_Goldberg]

Shane,

Here's a config from a 3Com router:

#Sample Configuration File

ddns-update-style interim;
ignore client-updates;

option sip-server-ip code 184 = string;
option sip-server-ip 01:04:A:E7:16:17:02:04:A:E7:16:22:04:07:A:E7:16:32:9:1:AA;

option sip-callp-ip code 120 = string;
option sip-callp-ip 01:A:E7:16:17:A:E7:16:22:A:A:A:A;

subnet 10.231.22.0 netmask 255.255.255.0 {
option routers 10.231.22.23;
option subnet-mask 255.255.255.0;
range 10.231.022.100 10.231.022.150;
default-lease-time 21600;
max-lease-time 43200;
}

I don't understand that gobblydygook, but copied it from our repository.