Cisco Systems OL-7396-01 Manual De Usuario
21-14
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 21
Configuring IMA Port Adapter Interfaces
Configuring IMA Group Parameters
Example
The following example shows the IMA group interface minimum active links configuration:
SwitchA# show ima interface
ATM0/0/ima1 is up
Group Index = 5
State: NearEnd = operational, FarEnd = operational
FailureStatus = noFailure
IMA Group Current Configuration:
MinNumTxLinks = 3
MinNumRxLinks = 3
DiffDelayMax = 25 FrameLength = 128
NeTxClkMode = common(ctc) CTC_Reference_Link = ATM0/0/2
TestLink = 2 Testpattern = Not Specified
TestProcStatus = disabled GTSM change timestamp = 990427165502
IMA Link Information:
Link Physical Status NearEnd Rx Status Test Status
----- --------------- ----------------- ---------------
ATM0/0/2 up active disabled
ATM0/0/3 up active disabled
ATM0/0/4
up active disabled
ATM0/0/5
up active disabled
Configuring IMA Group Interface Clock Mode
The links configured as part of a IMA group interface can derive their clocking from one single clock
source using common transmit clocking (CTC) mode, or the link clocking can be derived individually
from different clock sources using independent transmit clocking (ITC) mode. For example, if three
interfaces are configured as members of an IMA group interface, one can be configured to use the
reference clock, and the remaining links can derive their clocking from the local oscillator.
source using common transmit clocking (CTC) mode, or the link clocking can be derived individually
from different clock sources using independent transmit clocking (ITC) mode. For example, if three
interfaces are configured as members of an IMA group interface, one can be configured to use the
reference clock, and the remaining links can derive their clocking from the local oscillator.
To configure the clocking mode on the IMA group, perform the following steps, beginning in global
configuration mode:
configuration mode:
Example
The following example shows how to configure the IMA group clocking mode as independent:
SwitchA(config)# interface atm 0/0/ima1
SwitchA(config-if)# ima clock-mode independent
Command
Purpose
Step 1
Switch(config)# interface atm card/subcard/imagroup
Switch(config-if)#
Specifies the IMA group to configure and
enters interface configuration mode.
enters interface configuration mode.
Step 2
Switch(config-if)# ima clock-mode {common |
independent}
independent}
Specifies the transmit clock mode for the IMA
group.
group.