Cisco IP Transfer Point with GTT Application Group Overflow Load Sharing Configuration Example

From DocWiki

(Difference between revisions)
Jump to: navigation, search
(Editing Cisco IP Transfer Point with GTT Application Group Overflow Load Sharing Configuration Example)
(Introduction)
Line 160: Line 160:
==Introduction==
==Introduction==
-
<!--Describe the purpose of the example and any unique characteristics of this configuration-->
+
<!--This configuration allows the ITP to send a user defined amount of traffic to a primary destination. Excess traffic is then sent to a secondary destination. This distribution is more specific than those based on congestion. Overflow load sharing is especially useful for enforcing customer limitations.
 +
 
 +
-->
==Design==
==Design==

Revision as of 19:14, 16 June 2010

Configuring GTT Application Group Overflow Load Sharing for SCCP Class 0

This configuration allows the ITP to send a user defined amount of traffic to a primary destination. Excess traffic is then sent to a secondary destination. This distribution is more specific than those based on congestion. Overflow load sharing is especially useful for enforcing customer limitations.

Restrictions and Considerations

  • Only one rate limit entry is allowed for a GTT application group.
  • You configure the rate limit entry for a specific destination in the GTT application group.
  • You must configure both a primary and secondary (backup).
  • You can define the primary and secondary by configuring ASs, DPCs, or any combination of an AS and DPC.
  • The primary AS or DPC is defined as the one with the lowest configured cost.

CONFIGURATION STEPS

Command or Action

Purpose

enable

Router> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

configure terminal

Router# configure terminal

Enters global configuration mode.

cs7 gtt application-group group-name

Router(config)# cs7 gtt application-group abc

Defines the GTT application group and enables application-group submode.

multiplicity {cost | share | cgpa | wrr}

Router(config-cs7-gtt-app-grp)#  multiplicity cost

Specifies a method for selecting a destination for the application group.

  • cost—Uses the destination with the least cost if that destination is available.
  • share—Shares equally among all destinations.
  • cgpa—Uses the SCCP calling party address (CGPA) field, which results in a weighted factor selection number for choosing the next destination from the available items in the application group.
  • wrr—Applies weighted round robin load balancing (WRR) to SCCP class 0 and SCCP class 1 traffic.
  • The cost keyword is used for overflow load sharing configurations.

[instance instance-number] asname as-name {cost [ssn ssn] {gt [ntt ntt] | pcssn} [limit rate] | wf [ssn ssn] {gt [ntt ntt] | pcssn}}

The primary AS use the limit keyword and rate argument to define the rate limit.

Router(config-cs7-gtt-app-grp)#  asname weekday 1 gt limit 2000

The backup AS does not define a rate limit.

Router(config-cs7-gtt-app-grp)# asname weekday overflow 2 gt

(Optional) Assigns an M3UA or SUA AS directly to a global title.

You must configure both a primary and backup AS to take advantage of the GTT loadshare overflow feature.

You must assign a cost to the AS to take advantage of the GTT overflow loadsharing feature. The primary destination is defined by the lower cost.

  • cost Index value (1-64). Specifies the priority of the AS within the application group.

Use the limit keyword to limit traffic rate to a specific AS in a GTT application group. The rate limit is configured only on the primary destination.

  • limit—Specifies the traffic-rate limitation.
  • rate—defines the rate as an integer value from 1 to 4294967296 MSU/sec.

[instance instance-number] pc pc [ssn ssn] {cost {gt[ntt ntt]|pcssn} [limit rate] | wf {gt [ntt ntt]|pcssn}}

The primary DPC use the limit keyword and rate argument to define the rate limit.

Router(config-cs7-gtt-app-grp)#   pc 1.1.1 ssn 11 1 pcssn limit 2000

The backup DPC does not define a rate limit.

Router(config-cs7-gtt-app-grp)# pc 1.1.2 ssn 11 2 pcssn

(Optional) Adds or changes a point code and optional subsystem number in the application group.

You must configure both a primary and backup DPC to take advantage of the GTT loadshare overflow feature.

You must assign a cost to the DPC to take advantage of the GTT overflow load sharing feature. The primary destination is defined by the lower cost. The rate limit is configured only on the primary destination.

  • cost Index value (1-64). Specifies the priority of the DPC within the application group.

Use the limit keyword to specify the traffic limitations for a specific AS in a GTT application group. The limit keyword is configured only on the primary destination.

  • limit—specifies the traffic limitation.
  • rate—defines the rate as an integer value from 1 to 4294967296 MSU/sec.

exit

Router(config-cs7-gtt-app-grp)# exit

Exits CS7 GTT application-group submode. Example

In the following example, the application group SMS-peak-on-weekdays has a primary DPC with a point code of 1.1.1 is limited to a rate of 2000 MSU per second. Any overflow traffic is sent to the backup DPC with a point code of 1.1.2. The primary DPC is defined by the lower cost of 1. The backup is defined by the higher cost of 2.

cs7 gtt application-group SMS-peak-on-weekdays

multiplicity cost

pc 1.1.1 ssn 11 1 pcssn limit 2000

pc 1.1.2 ssn 11 2 pcssn

In the following example, the application group SMS-peak-on-weekdays has a primary AS named weekday is limited to a rate of 2000 MSU per second. Any overflow traffic is sent to the backup AS named weekend. The primary AS is defined by the lower cost of 1. The AS is defined by the higher cost of 2.

cs7 gtt application-group SMS-peak-on-weekdays

multiplicity cost

asname weekday 1 gt limit 2000

asname weekend 2 gt

Verifying and Monitoring

To verify the GTT SCCP overflow loadshare feature, use the following command in EXEC mode:

Command

Purpose Router# show cs7 {instance instance} id rate-limit {pc pc | asname as-name}

Displays the rate limit status of MTP overflow loadshare through the GTT application group . Router# show cs7 instance id gtt application-group name application-group-name rate-limit

Displays the rate limit status of each line card for GTT SCCP loadshare overflow.









Contents

Introduction

Design

Sample topology.jpg

Configuration

Related show Commands

This section provides information you can use to confirm your configuration is working properly.

Certain show commands are supported by the Output Interpreter Tool (registered customers only), which allows you to view an analysis of show command output.


Show running-config

Add show running config of your device

Related Information

Technical Support & Documentation - Cisco Systems


Rating: 0.0/5 (0 votes cast)

Personal tools