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170 CHAPTER 12: CONFIGURING PPP AND MP
Whether the PPP user passes the authentication will be finally decided by AAA,
which can authenticate PPP user at local or at RADIUS server.
Local authentication is to authenticate the local user configured through the
local-user user password { simple | cipher } password command, and
RADIUS server authentication is to authenticate using the user database on
RADIUS server. The specific configuration commands are shown in the following
table.
Table 199 Configure AAA authentication and accounting of PPP
For PPP authentication method of AAA, refer to Security. If PPP authentication
method of AAA is not specified on the interface, please use the default
authentication method.
4 Configure PPP Negotiation Parameter
The following PPP negotiation parameters can be configured:
■ Time interval between negotiation timeout
During PPP negotiation, if the response packet of the peer is not received
within this time interval, PPP will retransmit the packet. The default time
interval of timeout is 10s, and the value range is 1~10s.
■ Some negotiation parameters of NCP
For the configuration of local IP address and the IP address assigned to the
peer, refer to Network Protocol. For example, if it is necessary for the remote
end to allocate an IP address for the local end, you can use the
ip address
ppp-negotiate
command, while the remote address command can be used
to designate the local to assign IP address for the peer.
Table 200 Configure the time interval of PPP negotiation timeout
5 Configure PPP Compression
The current the 3Com Router version supports the Stac compression method.
Perform the following task in the interface view.
Table 201 Configure PPP compression
Operation Command
Enable AAA aaa-enable
Configure PPP authentication method of AAA aaa authentication ppp {
default | list-name } [
method1 | method2 | ...... ]
Configure the local first authentication of AAA aaa authentication local-first
Configure PPP authentication method of AAA at
the interface
ppp authentication-mode { chap
| pap } [ default | list-name ]
Operation Command
Configure the time interval of negotiation timeout ppp timer negotiate
seconds
Restore the default of time interval of negotiation
timeout
undo ppp timer negotiate
Operation Command
Configure as Stac compression permitted on the
interface
ppp compression stac-lzs
Cancel the Stac compression used by the interface undo ppp compression
stac-lzs