SROS Command Line Interface Reference Guide
PPP Interface Configuration Command Set
5991-2114
© Copyright 2007 Hewlett-Packard Development Company, L.P.
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expected to be sent from the peer. The peer must also have the
username
up both to verify the incoming
username from the local router and to use the password (along with its hostname) in the response to the
local router.
Configuring CHAP Example 2: Both routers require the peer to authenticate itself.
On the local router (hostname Local):
Local(config-ppp 1)#
ppp authentication chap
Local(config-ppp 1)#
username Peer password same
On the peer (hostname Peer):
Peer(config-ppp 1)#
ppp authentication chap
Peer(config-ppp 1)#
username Local password same
This is basically identical to Example 1 except that both routers will now challenge each other and
respond.
Configuring CHAP Example 3: Using the ppp chap hostname command as an alternate solution.
On the local router (hostname Local):
Local(config-ppp 1)#
ppp authentication chap
Local(config-ppp 1)#
username Peer password same
Local(config-ppp 1)#
ppp chap hostname nearend
On the peer (hostname Peer):
Peer(config-ppp 1)#
username nearend password same
Notice the peer is expecting username “nearend” even though the local router's hostname is “Local."
Therefore the local router can use the
ppp chap hostname
command to send the correct name on the
challenge.
Configuring CHAP Example 4: Using the ppp chap password command as an alternate solution.
On the local router (hostname Local):
Local(config-ppp 1)#
ppp authentication chap
Local(config-ppp 1)#
username Peer password different
On the peer (hostname Peer):
Peer(config-ppp 1)#
username Local password same
Peer(config-ppp 1)#
ppp chap password different
Here the local router challenges with hostname "Local." The peer verifies the name in the username
database, but instead of sending the password "same" in the response, it uses the one in the
ppp chap
password
command. The local router then verifies that user "Peer" with password "different" is valid and
sends a "success."
Note
Both ends must have identical passwords.
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