Cisco Catalyst 8540 MSR Configuration Manual page 247

Chapter 7 Configuring Virtual Connections
On initial configuration of the atm input-xlate-table autominblock command, ITT memory may
already be somewhat fragmented due to previous commands.
The effect of the fragmentation can be minimized by configuring, when first using the VPI, a
cross-connect that uses the maximum VCI on a VPI. Note, however, that this should not be considered
the best everyday practice; in general, for effective automatic determination of minimum block size on
a VPI, a PVC should be configured by using the planned maximum VCI on a VPI.
When autominblock mode is disabled (via use of the no form of the command), all previously entered
minblock configuration commands entered without the force keyword are lost.
Unless one of the atm input-xlate-table configuration commands is entered, the system operates as it
did prior to these enhancements.
Whether or not the atm input-xlate-table autominblock configuration is in effect, the user can
configure atm input-xlate-table minblock for interface/VPIs, (if the force keyword is used). The affect
of the minblock command in the various situations in which it can be used is shown in
Table 7-5
autominblock
mode enabled
True
True
False
False
OL-7396-01
autominblock-force minblock Interaction Matrix
force minblock with
command keyword used
True
False
True
False
Input Translation Table Management
Effect
Command accepted; value
rounded up and used as
block-size hint, value not
overridden by automatic
analysis; value will be
nvgened.
Command accepted; value
rounded up used as a floor for
block-size hint; value may be
overridden by automatic
analysis; value not necessarily
nvgened.
Command accepted; value
rounded up and used as
block-size hint; value will be
nvgened
Command not accepted.
ATM Switch Router Software Configuration Guide
Table 7-5:
7-99