Compression - Cabletron Systems SmartSwitch 9W006 User Manual

C
OMPRESSION
Problem:
Compression is not established for a device for which it is expected.
Action:
1. Issue the cmp stats console command then issue the dr console command to check the
message report log. A message will inform you if the compression failed due to memory
constraints.
2. Use SFVRA-CFG to verify that the SmartSwitch Remote Access Module has compression
enabled. To do this:
a. If it is not already running, start up SFVRA-CFG.
b. From the toolbar, select Functions then select Connection Groups or click the
c. Click on the site's connection group (this should have been configured previously).
d. Click on the site in question, then on the same screen, click on Edit Group Connections.
e. Double click on the connection in question.
f. Click on the Access tab.
g. If it is not enabled, enable Compression for this connection.
h. If you made any changes, download the new configuration files to the site.
For more detailed instructions, refer to the following sections in the SFVRA Configuration
Manager User's Guide:
• For compression information: refer to Adjusting Access Information in the Configuring
Connection Groups chapter.
• For downloading updated configuration files: refer to Downloading Configuration Updates in
the Exporting Configuration Files chapter.
3. Verify that the device to which the connection is being established has compression enabled. If
the device is another SmartSwitch Remote Access Module, refer to the previous step for
instructions.
4. Use the trace console command to examine the CCP frames exchanged with the device. This is
typically accomplished by issuing the trace ppp on command, erasing the log contents,
establishing the call, and then examining the log again (by issuing the dr console command) to
view the frame trace.
The following traces illustrate some common PPP startup scenarios when compression is
enabled. Only the CCP frames are excerpted for clarity.
• Successful Negotiation
As a reference, the following trace illustrates a successful negotiation of CCP using the Stac
P D
ROBLEM IAGNOSIS

Compression

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