Specifications

5-2
Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 5 Cisco IGX 8400 Series Lines
Functional Overview
IMA lines on the IGX support the following features:
• Support for up to 8 T1/E1 lines.
• Support for connections to any CPE that is ATM Forum IMA Standard Version 1.0 compliant.
• Support for both IMA and non-IMA lines on the same card.
• Support for addition or deletion of physical links while the IMA group remains active, as long as
the following rules are followed:
– A physical line cannot be deleted from a group if the resulting numbers of physical lines in the
IMA group is less than the minimum retained links specified.
– The primary link (the first physical line in the IMA group) can not be deleted dynamically.
• Configurable differential delay for the IMA line.
• Support for the common transmit clock (CTC) mode, meaning that all lines in the IMA use the same
clock.
• Configurable minimum retained links in the IMA group. For example, if 8 lines compose an IMA
line, you specify how many active lines in the group can fail before the IMA line fails.
For information on the port speeds available for IMA line groups, see Table 5-2.
For more information on IMA and its applications to trunks, see Chapter 4, “Cisco IGX 8400 Series
Trunks”
Table 5-2 Available Port Speeds for IMA Trunk or Line Groups
Interface Port Speed (DS0) Port Speed (cps) Description
8xT1 T1/190 28697 LN.1–8
7xT1 T1/166 25056 LN.1–7
7xT1 T1/142 21433 LN.1–6
6xT1 T1/118 17811 LN.1–5
5xT1 T1/95 14339 LN.1–4
4xT1 T1/71 10716 LN.1–3
3xT1 T1/47 7094 LN.1–2
2xT1 T1/23 3471 LN.1
T1 T1/24 3622 Non-IMA
8xE1 E1/238 35924 LN.1–8
7xE1 E1/208 31396 LN.1–7
6xE1 E1/178 26867 LN.1–6
5xE1 E1/148 22339 LN.1–5
4xE1 E1/119 17962 LN.1–4
3xE1 E1/89 13433 LN.1–3
2xE1 E1/59 8905 LN.1–2
1xE1 E1/29 4377 LN.1
E1 E1/30 4528 Non-IMA