AIS AI2524 user manual Example Frame Relay Traffic Shaping

AI2524 Router Card User’s Manual

Define Custom Queue Lists for the Map Class

You can define a queue list for a protocol and a default queue list. You can also specify the maximum number of bytes to be transmitted in any cycle. The number used for a specific queue list ties the list to the Frame Relay custom-queue list defined for a specified map class.

For example, if you enter the frame relay custom-queue- list 1 command for the map class slow_vcs and then you enter th queue-list 1 protocol ip list 100 command, that queue list is used for the slow_vcs map class; access-list 100 defini- tion is also used for that map class and queue. The average and peak traffic rates defined for the slow_vcs map class are used for IP traffi that meets the access list 100 criteria.

Example: Frame Relay Traffic Shaping

This example illustrates a Frame Relay interface with three point-to point subinterfaces.

In this example, the virtual circuits on subinterfaces Serial0.1 a Serial0.2 inherit class parameters from the main interface, namely those defined in slow_vcs. However, the virtual circuit defined on sub- interface Serial0.2 (DLCI 102) is specifically configured to use map class fast_vcs.

Map class slow_vcs uses a peak rate of 9600 and average rate of 4800 bps. Because BECN feedback is enabled by default, the output rate will be cut back as low as 4800bps in response to received BECNs. This map class is configured to use custom queuing using queue-list 1. In this example, queue-list 1 has 3 queues, with the first two being con- trolled by access lists 100 and 115.

Map class fast_vcs uses a peak rate of 64000 and average rate of 16000 bps. Because BECN feedback is enabled by default, the output rate will be cut back as low as 4800bps in response to received BECNs. This map class is configured to use priority-queuing using priority- group 2.

Page 13-16	August 1997
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