3Com 3C13636 Configuration Manual page 301

3Com Router 3000 Ethernet Family
Configuration Guide
By default, the IP address of interface is not negotiable.
Caution:
You may configure an interface to obtain an IP address through negotiation only
when the interface is encapsulated with PPP. When PPP goes down, the IP
address obtained through PPP negotiation is deleted.
After you configure IP address negotiation on an interface that has been assigned
an IP address or configured with IP address negotiation, the original IP address is
deleted, whether it is manually assigned or obtained through PPP negotiation.
After you configure IP address negotiation on an interface, the interface can obtain
IP address automatically and you need not to assign it an IP address.
Once the IP address that an interface obtained through PPP negotiation is
removed, the interface will have no IP address.
II. Configuring server
When the router is functioning as the server to assign an IP address to a PPP user,
three IP address assignment methods are available.
1) Method 1: Assign an IP address to the PPP user directly on the interface. This
method does not require the configuration of address pool.
Table 1-9 Assign an IP address to a PPP user on the interface
Assign an IP address to the PPP user
Disable the interface to assign IP
addresses to PPP users
By default, the interface does not assign IP address to its peer.
2) Method 2: Assign an IP address picked from a global address pool
In this approach, you need to do the following:
Create a global address pool in system view.
Assign the address pool (only one is allowed) to the interface by executing the
remote address pool command in interface view.
Operation
3Com Corporation
1-9
Chapter 1 PPP and MP Configuration
Command
remote address ip-address
undo remote address