When the DHCP or PPPoE mode is used, the IAD may take about eight minutes to
restart if the IAD cannot obtain the IP address in DHCP or PPPoE mode. Verify that the
DHCP or PPPoE server is available and the server information is correct.
Changing the IP address may disconnect the Telnet connection. Then, you should
establish the Telnet connection by using a new IP address.
Step 4 (Optional) Configure the DNS.
If the DNS server is available on the network, you can configure the DNS server on the
IAD so that the IAD can access other devices according to domain names.
1. Set the IP address of the DNS server
The command is dns serverip-address. For example:
TERMINAL(config)#dns server 191.168.10.50
2. (Optional) set a domain name suffix
The IAD automatically adds the domain name suffix to a domain name. The
command is dns domain-namedomain-name. For example, run the following
command to set the domain suffix to tele.com:
TERMINAL(config)#dns domain-name tele.com
In this case, if the domain name of the SIP server is set to softco, the IAD sends
softco.tele.com to the DNS server to obtain the IP address of the SIP server.
Run the display dns command to view the DNS status.
Step 5 Configure the SIP server and the user domain name.
Run the sip serverindexaddress ip-addressdomainuser-domain-name command to
configure the IP address of the SIP server and user domain name.
TERMINAL(config)#sip server 0 address 192.169.1.40 domain abc.def.com
There are three modes to obtain the IP address of the SIP server, consisting of STATIC, DNS
and DHCP.
If the DNS is configured, you can set the domain name of the SIP server in static mode
or select the DNS mode to configure the SIP server. For details, see the Manual
Configuration (CLI) in the CD-ROM.
If the IP address of the SIP server is obtained in DHCP mode, you can configure the SIP
server in DHCP mode.
By default, the IAD registers with the server whose index is 0. If the server is faulty,
the IAD registers with standby server 1. If standby server 1 is faulty, the IAD registers
with standby server 2. You can run the sip server-autoswitch enable command to
enable automatic switch between servers. The server whose index is 0 is the active
server, the servers whose indexes are 1 and 2 are standby servers. If the active server
has been restored when the IAD registers with a standby server, the IAD re-registers
with the active server.
Step 6 Set the SIP software parameters.
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