Table Of Contents
Setting the Port Threshold for the Trunk Card
Supported Standards, MIBs, and RFCs
Configuring the Port Threshold
Setting the Port Threshold for the Trunk Card
This feature module describes the Setting the Port Threshold for the Trunk Card feature. It includes the overview, supported platforms, configuration tasks, and a command reference.
This document includes the following sections:
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Supported Standards, MIBs, and RFCs
Feature Overview
The Setting the Port Threshold for the Trunk Card feature allows you to avoid dropped calls by setting a port threshold that must be reached before a trunk card transmitter is enabled. In platforms with a CT3 Dial Feature Card (DFC) and one or more universal port (previously called NextPort) DFCs, the CT3 DFC reaches active state before the universal port DFCs because the universal port DFCs have a more complicated download and initialization process than does the CT3 DFC. When the CT3 DFC becomes active, the central office can route calls to the platform. However, if the universal port DFC modules are not yet active, the calls are dropped due to unavailability of resources. The central office does not attempt to route calls to the failed platform again; even if the universal port DFCs subsequently become active, the platform still does not receive calls.
The Setting the Port Threshold for the Trunk Card feature provides a new command that allows you to delay the enabling time of the trunk line at system startup to wait for the universal port DFC modules to initialize. The trunk card transmitter is not enabled until after the universal port DFC modules are active, and calls are then routed to the platform.
Benefits
Setting the port threshold for the trunk card allows the universal port DFC modules to be initialized and ready before the trunk card transmitter is enabled. This feature prevents dropped calls caused by the local office routing calls to inactive platforms. Setting the port threshold allows calls to be routed to the platform after the universal port DFC modules are active.
Supported Platforms
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Supported Standards, MIBs, and RFCs
Standards
No new or modified standards are supported by this feature.
MIBs
No new or modified standards are supported by this feature.
To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB web site on Cisco Connection Online (CCO) at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
RFCs
No new or modified standards are supported by this feature.
Prerequisites
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Configuration Tasks
See the following sections for configuration tasks for the Setting the Port Threshold for the Trunk Card feature. Each task in the list is identified as either optional or required.
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Configuring the Port Threshold
Verifying the Port Threshold
Step 1
Step 2
Configuration Examples
This section provides the following configuration examples:
Port Threshold Example
In the following example, the port threshold for the trunk card is set to 70 percent:
Router# config tEnter configuration commands, one per line. End with CNTL/Z.Router(config)# trunk activate port-threshold 70Router(config)#^ZRouter#Router# show runningBuilding configuration...Current configuration : 5400 bytes!version 12.1no service single-slot-reload-enableservice timestamps debug uptimeservice timestamps log uptimeservice password-encryption!hostname Router!no boot startup-testno logging bufferedlogging rate-limit console 10 except errorsaaa new-modelaaa authentication ppp default localaaa authorization network default local!!!resource-pool disablecall rsvp-sync!!!!ip subnet-zerono ip fingerno ip domain-lookup!isdn switch-type primary-nicns event-service server!!!!!!trunk activate port-threshold 70!controller T3 3/0framing m23clock source linet1 1-28 controller!Command Reference
This section documents the new trunk activate port-threshold command that configures the Setting the Port Threshold for the Trunk Card feature. All other commands used with this feature are documented in the Cisco IOS Release 12.1 command reference publications.
trunk activate port-threshold
To specify the percentage of available port resources required to enable a trunk card transmitter, use the trunk activate port-threshold command. To restore the default value, use the no form of this command.
trunk activate port-threshold percentage
no trunk activate port-threshold percentage
Syntax Description
percentage
Decimal integer from 0 through 100 that indicates the percentage of universal port DFC resources required before a trunk line is enabled.
Defaults
0
Command Modes
global configuration
Command History
Usage Guidelines
Use this command if you have a CT3 DFC and one or more universal port DFCs on the same platform and calls are dropped at system startup. This command enables the universal port modules to initialize before calls are routed to the platform. If the universal port modules do not initialize, the platform is identified as unavailable and calls are dropped.
Examples
The following example sets the port threshold for the trunk card to 70 percent:
Router# config tEnter configuration commands, one per line. End with CNTL/Z.Router(config)# trunk activate port-threshold 70Router(config)# ^ZRouter#Router# show runningBuilding configuration...Current configuration : 5400 bytes!version 12.1no service single-slot-reload-enableservice timestamps debug uptimeservice timestamps log uptimeservice password-encryption!hostname Router!no boot startup-testno logging bufferedlogging rate-limit console 10 except errorsaaa new-modelaaa authentication ppp default localaaa authorization network default local!!!resource-pool disablecall rsvp-sync!!!!ip subnet-zerono ip fingerno ip domain-lookup!isdn switch-type primary-nicns event-service server!!!!!!trunk activate port-threshold 70!controller T3 3/0framing m23clock source linet1 1-28 controller!
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