Specifications

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Cisco MGX 8800/8900 Series Software Configuration Guide
Release 5.1, Part Number OL-6482-01, Rev. A0, January 25, 2005
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
Table 3-4 addimagrp Command Parameters
group Enter an IMA group number using the format bay.line. On a
PXM1E, the bay number is always 2 and the range for lines is
1-16.
version IMA version. Enter one of the following values:
• Version 1.0 = 1
• Version 1.1 = 2
minLinks Minimum number of links required for group operation. For
example, if you create an IMA group of 4 lines and specify a
minimum number of 3 lines, then three of the four specified
lines must be operational before the IMA group can be used.
The range for this value is from 1 to n, where n represents the
number of lines that are dedicated to the group.
txImaId Transmit IMA ID, which is the IMA ID number transmitted in
the IMA ID field (Range: 0-255). The transmit IMA ID should
be different at each end of the IMA link. When the transmit ID
is different at each end, the switch accurately detects link
loopbacks. If the same transmit ID is configured at both ends
of an IMA link, the switch will incorrectly determine that the
link is in loopback state.
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 5.1 of the
MGX 8850 (PXM1E) and 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