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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 7 Configuring Virtual Connections
Input Translation Table Management
The following example shows all VP snoop connections on ATM interface 0/1/2, VPI = 57, in extended
mode with the switch processor feature card installed:
Switch> show atm snoop-vp interface atm 0/1/2 57
Interface: ATM0/1/2, Type: oc3suni
VPI = 57
Status: DOWN
Time-since-last-status-change: 00:14:46
Connection-type: PVP
Cast-type: snooping-leaf
Usage-Parameter-Control (UPC): pass
Wrr weight: 32
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states: Not-applicable
Cross-connect-interface: ATM0/0/2, Type: oc3suni
Cross-connect-VPI = 57
Cross-connect-UPC: pass
Cross-connect OAM-configuration: disabled
Cross-connect OAM-state: Not-applicable
Threshold Group: 5, Cells queued: 0
Rx cells: 0, Tx cells: 0
Tx Clp0:0, Tx Clp1: 0
Rx Clp0:0, Rx Clp1: 0
Rx Upc Violations:0, Rx cell drops:0
Rx Clp0 q full drops:0, Rx Clp1 qthresh drops:0
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx cdvt: 1024 (from default for interface)
Rx mbs: none
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
Tx cdvt: none
Tx mbs: none
Input Translation Table Management
The Input Translation Table (ITT) is a data structure used in the switch fabric chipsets for the Catalyst
8540MSR, Catalyst 8510MSR, LightStream1010, and 6400 NSP1 platforms. It is used in the handling
of input cells. The ITT can be allocated in blocks of entries, each ITT block is dedicated to a VPI on a
switch port. The size of ITT blocks must be a power of two. Because the size of the ITT memory is
limited, and blocks may be large, allocation of ITT space can be a constraint in configuring new
VCs/VPs, and in installing connections at startup and after interface flaps.
Feature Overview
1. The Input Translation Table Management feature improves the use of ITT resources by:
• Minimizing fragmentation
• Shrinking ITT blocks
• Viewing used, and unused ITT blocks