Specifies a method for selecting a destination for the application group.
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* '''cost'''—Uses the destination with the least cost if that destination is available.
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* '''share'''—Shares equally among all destinations.
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* '''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.
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* '''wrr'''—Applies weighted round robin load balancing (WRR) to SCCP class 0 and SCCP class 1 traffic.
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* The '''cost '''keyword is used for overflow load sharing configurations.
(Optional) Assigns an M3UA or SUA AS directly to a global title.
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You must configure both a primary and backup AS to take advantage of the GTT loadshare overflow feature.
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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.
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* ''cost''—''' '''Index value (1-64). Specifies the priority of the AS within the application group.
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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.
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* '''limit'''—Specifies the traffic-rate limitation.
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* ''rate''—defines the rate as an integer value from 1 to 4294967296 MSU/sec.
<font size = "1">Router(config-cs7-gtt-app-grp)# pc 1.1.2 ssn 11 2 pcssn</font>
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(Optional) Adds or changes a point code and optional subsystem number in the application group.
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You must configure both a primary and backup DPC to take advantage of the GTT loadshare overflow feature.
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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.
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* ''cost''—''' '''Index value (1-64). Specifies the priority of the DPC within the application group.
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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.
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* '''limit'''—specifies the traffic limitation.
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* ''rate''—defines the rate as an integer value from 1 to 4294967296 MSU/sec.
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.
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.
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.
Configuration
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
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.
Related show Commands
This section provides information you can use to confirm your configuration is working properly.
