Specifications

6-14
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 6 Modem Management Operations
Gathering and Viewing Call Statistics

Display the disconnect reasons for the modems that trained up:
5300-NAS#show modem call-stats 0
dial-in/dial-out call statistics
compress retrain lostCarr userHgup rmtLink trainup hostDrop wdogTimr
Mdm # % # % # % # % # % # % # % # %
Total 237 916 413 124 9999 1064 8496 0
dial-out call statistics
noCarr noDitone busy abort dialStrg autoLgon dialTout rmtHgup
Mdm # % # % # % # % # % # % # % # %
Total 1715 0 0 0 0 0 0 0
Table 6-5 describes some of the significant fields in the previous example.
Besides the “hostDrop” message, all other disconnect reasons are not good. If the call trained up without
EC, then the peer modem will probably not communicate an orderly disconnect with the Cisco IOS.
For example, the messages “lostCarr” or “retrain” might be displayed even though the peer DTE
voluntarily disconnected. The collective total of disconnect reasons should be less than 10% of the total
number of calls.

Look at detailed disconnect reasons for individual modems:
5300-NAS#show modem call-stats
dial-in/dial-out call statistics
compress retrain lostCarr userHgup rmtLink trainup hostDrop wdogTimr
Mdm # % # % # % # % # % # % # % # %
1/0 5 2 23 2 7 1 2 1 971 2 20 1 176 2 0 0
* 1/1 8 3 18 1 12 2 6 4 949 2 29 2 167 1 0 0
1/2 3 1 14 1 8 1 2 1 954 2 26 2 180 2 0 0
* 1/3 4 1 19 2 9 2 1 0 927 2 21 1 202 2 0 0
* 1/4 1 0 20 2 10 2 2 1 961 2 23 2 192 2 0 0
1/5 2 0 19 2 10 2 4 3 893 1 30 2 182 2 0 0
1/6 4 1 20 2 10 2 3 2 778 1 21 1 140 1 0 0
* 1/7 6 2 21 2 7 1 1 0 915 2 25 2 176 2 0 0
Table 6-5 Show Modem Call-Status Field Descriptions
Field Description
rmtLink
9999
RmtLink is the most common disconnect reason. RmtLink means that the
modem trained up, error correction was negotiated, and the client DTE
decided to hang up. All the call-stat counters do not go higher than 9999.
hostDrop
HostDrop (or dtrDrop) means the Cisco IOS (DTE) informed the modem to
terminate the call. For example:

Idle timeouts

Absolute timeouts

Authentication failures

PPP negotiation failures

The Cisco IOS learns from the telephone switch that the DS0 was
disconnected.