Cisco Systems OL-7396-01 Manual De Usuario
21-4
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 21
Configuring IMA Port Adapter Interfaces
Configuring the T1/E1 IMA Port Adapter
•
Clock source = system clock
•
Transmit clock source = network derived
•
Loopback = no loopback
•
BERT = disabled
The following port adapter types have specific defaults assigned.
T1 port adapter:
•
Framing = extended super frame (ESF)
•
Line build-out (LBO) = short 133
•
Linecode = b8zs
•
Facilities Data Link (FDL) = no FDL
•
Yellow = enabled
E1 port adapter:
•
Framing = pcm30adm
•
Line build-out (LBO) = short gain12 22db
•
Linecode = hdb3
•
National bits = 1 1 1 1 1 1
The following defaults are assigned to all IMA groups:
•
Minimum number of active links = 1
•
Clock mode = common
•
Differential delay = 25 milliseconds
•
Frame length = 128 cells
•
Test link = first link in the group
•
Test pattern = value of test link
Configuring the T1/E1 IMA Interface
To manually change any of your default configuration values, perform the following steps, beginning in
global configuration mode:
global configuration mode:
Note
IMA is only possible on switches with FC-PFQ installed.
Command
Purpose
Step 1
Switch(config)# interface atm card/subcard/port
Switch(config-if)#
Specifies the ATM interface and enters interface
configuration mode.
configuration mode.
Step 2
Switch(config-if)# bert pattern {2^15 | 2^20 |
2^23 | 0s | 1s | 2^11 | 2^20-QRSS | alt-0-1}
interval minutes
2^23 | 0s | 1s | 2^11 | 2^20-QRSS | alt-0-1}
interval minutes
Configures the bit error rate test pattern.