Specifications

Setting Up the Network
How to Set Up the Network
37
Cisco IOS Survivable Remote Site Telephony Version 3.4 System Administrator Guide
DETAILED STEPS
Defining a Separate DHCP IP Address Pool for Each Cisco IP Phone
This task creates a name for the DHCP server address pool and specifies IP addresses. This method
requires you to make an entry for every IP phone.
SUMMARY STEPS
1. ip dhcp pool pool-name
2. host ip-address subnet-mask
3. option 150 ip ip-address
4. default-router ip-address
5. exit
Command or Action Purpose
Step 6
ip dhcp pool pool-name
Example:
Router(config)# ip dhcp pool mypool
Creates a name for the DHCP server address pool
and enters DHCP pool configuration mode.
Step 7
network ip-address [mask | prefix-length]
Example:
Router(config-dhcp)# network 10.0.0.0 255.255.0.0
Specifies the IP address of the DHCP address pool
and the optional mask or number of bits in the
address prefix, preceded by a forward slash.
Step 8
option 150 ip ip-address
Example:
Router(config-dhcp)# option 150 ip 10.0.22.1
Specifies the TFTP server address from which the
Cisco IP phone downloads the image configuration
file. This needs to be the IP address of CallManager.
Step 9
default-router ip-address
Example:
Router(config-dhcp)# default-router 10.0.0.1
Specifies the router to which the Cisco IP phones
are connected directly.
• This router should be the Cisco SRST router
because this is the default address that is used to
obtain SRST service in the event of a WAN
outage. As long as the Cisco IP phones have a
connection to the Cisco SRST router, the
phones are able to get the required network
details.
Step 10
exit
Example:
Router(config-dhcp)# exit
Exits DHCP pool configuration mode.