DACS Configuration Procedures

When configuring a channelized T1/E1 interface, the MaxRxFrameSize of each bundle should be the same, regardless of the number of DS0s contained within each bundle.

For example:

Port 2 (IfIndex 153) is a channelized T1 interface, and 3 WAN channels have been added to it (IfIndexes 81, 82, and 83).

IfIndex	DS0s assigned	Default maxRxFrameSize {100 x # of DS0s}
81	1	100
82	2,3,4	300
83	5,6,7,8	400

In the above example, the maxRxFrameSize for IfIndex 83 (400) needs to be applied to IfIndex 82 and 83 as well, because that is the largest maxRxFrameSize on that port.

If the sum of the WAN channels maxRxFrameSize times the number of buffers is greater than the total available slave processor memory (approximately 450K), the unit will:

Automatically reduce the maxRxFrameSize for each bundle to match the lowest of the default values (in this instance, 100).
If necessary, reduce the number of buffers per WAN channel.

This will ensure memory availability at the expense of performance.

Note: The above example is a basic configuration, and may not be adequate for some applications. If problems occur, reduce the maxRxFrameSize by increments of 50. Performance on specific bundles may decrease in order to achieve peak overall performance.

Note that in releases prior to 4.1.2, channelized services are supported on port 2 only. If you do define port 3 as channelized, PANL will not function on port 2.

You can use the following procedures to configure DACS on the Passport 4460.