Provisioning From Http Server Using Dhcp Option 67 - AudioCodes Mediant 4000 SBC User Manual

CHAPTER 40 Automatic Provisioning
}
subnet 10.31.0.0 netmask 255.255.0.0 {
pool {
allow members of "AudioCodes";
range 10.31.4.53 10.31.4.75;
filename "SIP_F6.60A.217.003.cmp –fb;device.ini";
option routers
option subnet-mask
}
}
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Provisioning from HTTP Server using DHCP Option 67

You can provision the device through HTTP using DHCP Option 67. In this setup, DHCP Option 67
informs the device of the URL address of the HTTP server from where it can download the
configuration file. This provisioning method is possible only if the DHCP server allows configuration
of DHCP Option values for different equipment in the network.
Upon device startup, the device sends a DHCP request. The DHCP response received from the
DHCP server contains networking (e.g., IP address and DNS server) information. In addition, the
response includes DHCP Option 67, which specifies the URL address of the HTTP server where
the device's configuration file is located. The device then automatically downloads the
configuration file from this HTTP server.
Below is an example of a configuration file (dhcpd.conf) of a Linux-based DHCP server, showing
the required format of Option 67:
ddns-update-style ad-hoc;
default-lease-time 3600;
max-lease-time 3600;
class "AudioCodes" {
match if(substring(hardware, 1, 3) = 00:90:8f);
}
subnet 10.31.0.0 netmask 255.255.0.0 {
pool {
allow members of "AudioCodes";
range 10.31.4.53 10.31.4.75;
10.31.0.1;
If the DHCP server denies the use of the device's current IP address and specifies
a different IP address (according to RFC 1541), the device must change its
networking parameters. If this occurs while calls are in progress, they are not
automatically rerouted to the new network address. Therefore, administrators are
advised to configure DHCP servers to allow renewal of IP addresses.
If the device's network cable is disconnected and then reconnected, a DHCP
renewal is performed (to verify that the device is still connected to the same
network). The device also includes its product name in the DHCP Option 60
Vendor Class Identifier. The DHCP server can use this product name to assign an
IP address accordingly.
After power-up, the device performs two distinct DHCP sequences. Only in the
second sequence is DHCP Option 60 included. If the device is software reset (e.g.,
from the Web interface or SNMP), only a single DHCP sequence containing Option
60 is sent.
255.255.0.0;
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Mediant 4000 SBC | User's Manual