This object indicates how an IP address is obtained
when a peer requesting one.
The actual parameters of these methods are indicated
by the objects defined after.
none -- means no IP address associated.
negotiate -- obtains IP address from a pre-configured
DHCP server.
ipAddressPool -- obtains IP address from an ip address
pool specified by cdslVTPeerIpAddrPool
to be defined.
In the set operation, only the parameter corresponding to
the value of this object is considered.
All other parameters are ignored and forgotten.