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Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Chapter 3 Provisioning PXM1E Communication Links
General PXM1E Configuration Procedures
In the following example, the user creates IMA group 2.1 running IMA version 1.0. The minimum
number of lines required for this group to operate is 3. The transmit IMA ID is 255, the transmit frame
length is 128, the transmit clock mode is CTC, and the maximum differential delay is 100.
MGXswitch.7.PXM.a >
addimagrp
2.1 1 3 255 128 1 100
Step 4
To verify that the IMA group has been created, enter the dspimagrps command:
MGXswitch.7.PXM.a >
dspimagrps
Ima Min Tx Rx Tx Diff NE-IMA FE-IMA IMA
Grp Lnks Frm Frm Clk Delay state state Ver
Len Len Mode (ms)
--------------------------------------------------------------------------------
2.1 1 128 128 CTC 100 StartUp StartUp 1.0
2.2 3 128 128 CTC 100 StartUp StartUp 1.1
2.3 3 128 128 CTC 100 StartUp StartUp 1.1
Configuring an IMA Group
Once you have added an IMA group on your PXM1E, you can configure that IMA group’s parameters.
Use the following procedure to configure IMA group parameters.
Step 1
Establish a configuration session with the active PXM1E.
Step 2
Enter the dspimagrps command to list the IMA groups configured on the current card.
txFrameLen
Transmit frame length. The optional values for each IMA
version are:
•
Version 1.0 = 128
•
Version 1.1 = 32, 64, 128, 256
txclkMode
Transmit clock mode. The available modes and option
numbers are:
•
Common Transmit Clock (CTC) = 1
•
Independent Transmit Clock (ITC) = 2
Note
Option 2: ITC is not supported in Release 5 of the
Cisco MGX 8850 (PXM1E) and Cisco MGX 8830
switches.
diffDelayMax
Maximum receive link differential delay. The ranges for each
link type are:
•
T1 = 1 to 275 msec
•
E1 = 1 to 220 msec
Table 3-4
addimagrp Command Parameters (continued)
