System information

Troubleshooting AppleTalk 9-209
ARA: Cannot Send or Receive Data over ARA Dialin Connection
ARA: Cannot Send or Receive Data over ARA Dialin Connection
Symptom: ARA connections are established, but users cannot send or receive ARA data over the
link.
Table 9-20 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table 9-20 ARA: Cannot Send or Receive Data over ARA Dialin Connection
Possible Problems Solution
MNP4 Link Request packets
sent by client ARA stack are
responded to by the serving
modem instead of the
ARA server
Step 1 Check the version numbers of the ARA software on the client and the
Cisco IOS software on the access server.
If you are using ARA version 1.0 or Cisco IOS software prior to
Release 10.2, it is advisable to upgrade to ARA 2.0 and Cisco IOS
Release 10.2 or later. ARA 2.0 modifies the framing of MNP4 Link
Request packets, allowing them to be passed to the access server
rather than responded to by the serving modem.
Step 2 If you cannot upgrade your software, try modifying the behavior of
the modem to use a LAPM-to-No Error Correction fallback instead of
a LAPM-to-MNP4-to-No Error Correction fallback. The modem no
longer listens for and respond to MNP4 messages, allowing MNP4
packets to reach the access server.
Note: Many modems cannot be configured in this manner.
Step 3 If your modem does not use LAPM error correction, it might be
possible to modify all ARA client scripts to extend the 500 ms pause
before exiting. Configure an additional delay that takes into account
the behavior of the serving modem.
Possible Causes Suggested Actions
Missing arap network
command entry
Step 1 Use the show running-config privileged exec command to view the
router configuration. If you are running Cisco IOS Release 10.2 or
later, look for an arap network global configuration command entry.
Step 2 Configure the arap network global configuration command to enable
ARA on the router or access server. The syntax for the arap network
command is as follows:
arap network [network-number] [zone-name]
Syntax Description:
• network-number—(Optional) The AppleTalk network number. The
network number must be unique on your AppleTalk network. This
network is where all ARAP users appear when they dial in to the
network.
• zone-name—(Optional) The AppleTalk zone name.
Missing autoselect command
Step 1 Use the show running-config privileged exec command to view the
router configuration. Check to see whether the autoselect arap line
configuration command is configured on the router.
Step 2 If the command is not present, add it to the configuration.