ADTRAN AOS Version R10.1.0 Command Reference Manual page 2151

Command Reference Guide
Notice the local router is expecting user name farend even though the peer router's host name is Peer.
Therefore, the peer router can use the ppp chap hostname command to send the correct name in the
challenge.
Both ends must have identical passwords.
Configuring CHAP Example 3: Both routers require each other to authenticate themselves using
the same shared password.
On the local router (host name Local):
Local(config-demand 1)#ppp authentication chap
Local(config-demand 1)#username Peer password same
On the peer (host name Peer):
Peer(config-demand 1)#ppp authentication chap
Peer(config-demand 1)#username Local password same
This is basically identical to Example 1 except that both routers will now challenge each other and
respond.
Both ends must have identical passwords.
Configuring CHAP Example 4: Both routers require each other to authenticate themselves using
two separate shared passwords.
On the local router (host name Local):
Local(config-demand 1)#ppp authentication chap
Local(config-demand 1)#username Peer password far
Local(config-demand 1)#ppp chap password near
On the peer (host name Peer):
Peer(config-demand 1)#ppp authentication chap
Peer(config-demand 1)#username Local password near
Peer(config-demand 1)#ppp chap password far
60000CRG0-35E Copyright © 2012 ADTRAN, Inc.
Demand Interface Command Set
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