C H A P T E R 21 Configuring Ima Port Adapter Interfaces; Configuring The T1/E1 Ima Port Adapter; Default T1/E1 Ima Interface Configuration - Cisco Catalyst 8540 MSR Configuration Manual

Chapter 21 Configuring IMA Port Adapter Interfaces
Figure 21-2 IMA Frames
Interface 0/0/1
ICP0 F
0 1
Interface 0/0/2
F F
Interface 0/0/3
ATM ICP0 ATM F
These ICP cells are distributed more evenly over the IMA frame but are shown closer for illustration
Note
purposes. Within an IMA frame, the ICP cells on all links have the same IMA frame sequence number.

Configuring the T1/E1 IMA Port Adapter

The T1/E1 IMA port adapter provides eight physical ports. Each port adapter supports up to four IMA
groups and independent ATM interfaces. The following are possible combinations:
•
•
•
•
•
The T1 line operates at 1.544 Mbps, which is equivalent to 24 time slots (DS0 channels). The T1 time
slot provides usable bandwidth of n x 64 kbps, where n is the time slot from 1 to 24. The E1 line operates
at 2.048 Mbps.
T1/E1 IMA port adapters support interface overbooking. For configuration information, see
"Configuring Resource Management."
By default, T1/E1 IMA interfaces are shut down when the port adapter is installed.
Note

Default T1/E1 IMA Interface Configuration

The following defaults are assigned to all T1/E1 IMA port adapter interfaces:
OL-7396-01
IMA frame 0
...
ATM F ATM ICP1 F
2 3 M-1 0
...
ATM ICP0 ATM F
...
ATM ATM ICP1 ATM F
ATM ATM layer cell
Four IMA groups
Three IMA groups and one independent ATM interface
Two IMA groups and two independent ATM interfaces
One IMA group and three independent ATM interfaces
No IMA group and four independent ATM interfaces
IMA frame 1
...
ATM F F
1 2 3 M-1 0
...
ATM ATM ICP1 ATM
...
ATM
Time
F Filler cell
ATM Switch Router Software Configuration Guide
Configuring the T1/E1 IMA Port Adapter
IMA frame 2
...
ICP2 F ATM ATM
1 2 3
...
F F ATM ICP2
...
ATM ICP2 ATM ATM
ICP# ICP cell in frame #
ATM
M-1
F
F
Chapter 9,
21-3