Specifications

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Cisco ATM Services (AXSM) Configuration Guide and Command Reference for MGX Switches
Release 5.2, Part Number OL-6484-01 Rev. C0, September 2005
Chapter 3 Provisioning ATM Services
General AXSM Configuration Procedures
In the following example, the user creates group 1 running IMA version 1.0. The minimum number of
links required for this group to operate is 3. The transmit IMA ID for IMA group 1 is 255, the transmit
frame length is 128, the transmit clock mode is CTC, and the maximum differential delay is 100.
M8850_LA.12.AXSME.a > addimagrp 1 1 3 255 128 1 100
Step 4 To configure additional IMA group parameters, enter the cnfimagrp command as follows:
cnfimagrp <-grp group> [-ver <version>] [-txm <minLinks>] [-txid <txImaId>] [-txfl
<txFrameLen>] [-dd <diffDelayMax>] [-uptim <groupUpTime>] [-dntim <groupDownTime>] [-vfb
<verFallback>] [-mode <autoRestart>] -rxid <rxImaIdExpected>]
Table 3-5 describes the parameters for the cnfimagrp command.
txFrameLen Transmit Frame Length.
Enter 32, 64, 128, or 256 for IMA 1.1, or enter 128 for IMA 1.0
txclkMode Transmit Clock Mode. Enter 1 to specify CTC.
Note Option 2, ITC is not supported in Release 5.1 of the Cisco MGX 8850
(PXM1E) and Cisco MGX 8830 switches.
diffDelayMax Maximum Differential Delay;
• Enter a umber between 1 and 275 msec for T1
• Enter a number between 1 and 220 msec for E1
Table 3-4 addimagrp Command Parameters (continued)
Parameter Description
Table 3-5 cnfimagrp Command Parameters
Parameter Description
group The bay number (1–2) and the IMA group number (1–16) in the format
bay.group. For example: 1.16
version The protocol version of the IMA group.
• 1 = IMA version 1.0
• 2 = IMA version 1.1
minLinks The minimum number of links that will allow the IMA group to be
operational (Range: 1–16). The minLinks value is configurable ONLY for
IMA version 1.1. For IMA version 1.0, the minLinks value is always 128.
txImaId The IMA ID number transmitted in the IMA ID field of the ICP cell
(Range: 0–255).
txFrameLen The length of transmitted IMA frame in megabytes. For IMA version 1.0, the
txImaFrameLength value is always 128. For version 1.1, the
txImaFrameLength value can be 32, 64, 128, or 256.
diffDelayMax The maximum differential delay in milliseconds (Range: 1–279). Defaults:
T1 = 275
E1 = 220
groupUpTime The group up time. Range: 0–400000 milliseconds. Default: 10000.
groupDownTime The group down time. Range: 0–100000 milliseconds. Default: 2500.