Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 1 IP Address Configuration Commands
3Com Corporation
1-2
indicates to delete the master IP address and undo ip address ip-address
net-mask sub indicates to delete the slave address. All the slave addresses must
be deleted before the master IP address can be deleted.
In addition, any two IP addresses configured for all interfaces on a router cannot be
located in the same subnet.
Related command: ip route-static, display ip interface, and display interface.
Example
# Configure the interface Serial 0/0/0 with the master IP address as 129.102.0.1, the
slave IP address is 202.38.160.1, and the subnet mask of both is 255.255.255.0.
[3Com-Serial1/0/0] ip address 129.102.0.1 255.255.255.0
[3Com-Serial1/0/0] ip address 202.38.160.1 255.255.255.0 sub
1.1.2 ip address ppp-negotiate
Syntax
ip address ppp-negotiate
undo ip address ppp-negotiate
View
Interface view
Parameter
None
Description
Use the ip address ppp-negotiate command to allow IP address be assigned through
negotiation at the interface.
Use the undo ip address ppp-negotiate command to disable this function.
By default, no interface IP address negotiation is allowed.
As PPP supports IP address negotiation, only when the interface is encapsulated with
the link-layer protocol PPP, can the IP address negotiation at this interface be
configured.
Normally, it is not necessary to configure IP address negotiation. Only in some special
circumstances such as accessing Internet through the ISP, the IP addresses of the
interface that is connected with the ISP are allocated by the ISP through negotiation.
When IP address negotiation for the interface is configured, it is not necessary to
configure the IP address manually for this interface.