background image
Implementing Basic DDR 155
Troubleshooting Multilink PPP
Multilink PPP can have its share of issues. Fortunately, there are some troubleshooting
commands readily available. The following commands are useful in resolving any issues with
your PPP connection(s). Each command is followed by sample output.
show ppp multilink Command
Executing the show ppp multilink command displays the current status of Multilink PPP
sessions. Example 6-18 shows sample output of a call in progress.
show dialer Command
Executing the show dialer command displays active calls and status information. Example 6-19
shows sample output of calls in session.
Example 6-18
show ppp multilink Command Output
RouterA#show ppp multilink
Bundle RouterA, 1 member, Master link is BRI 0
Dialer Interface is BRI0
0 lost fragments, 0 reordered, 0 unassigned, sequence 0x0/0x0 rcvd/sent
0 discarded, 0 lost received, 1/255 load
Member Link: 1 (max not set, min not set)
BRI0:1
Example 6-19
show dialer Command Output
RouterA#show dialer
BRI0 - dialer type = ISDN
Dial String
Successes
Failures
Last called
Last status
2145552222
18
0
00:01:12
successful

0 incoming call(s) have been screened.
BRI0:1 - dialer type = ISDN
Idle timer (120 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is multilink member
Dial reason: ip (s=10.12.1.1, d=10.12.1.2)
Connected to 2145552222 (RouterB)
BRI0:2 - dialer type = ISDN
Idle timer (120 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is idle
Idle timer (120 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is data link layer up
Time until disconnect 93 secs
Connected to 2145552223 (RouterB)