118CHAPTER 2: IMA-E1/T1 INTERFACE CONFIGURATION COMMANDS

Use the undo ima ima-groupcommand to remove an interface from an IMA group.

By default, no IMA group is created.

Before adding an ATM E1/T1 interface to an IMA group, you need to remove the network layer service-related configurations of the interface. for example, the IP address assigned to the interface by using the undo ip address command.

n The first link in the IMA group is the primary link. You can remove it only when you remove the IMA group.

Example # Add the link of ATM E1 interface 5/0 to IMA group 1.

<Sysname> system-view

[Sysname] interface atm 5/0

[Sysname-Atm5/0] ima ima-group 1

ima-clock

Syntax ima-clock { ctc [ link-number number ] itc }

undo ima-clock

View IMA group interface view

Parameter ctc: Common transmit clock configuration. In this mode, all links in the IMA group share the same clock source, which can be an external clock or the one extracted from a member link.

link-numbernumber: Number of the E1/T1 link that provides the clock source. It ranges from 0 to 7.

itc: Independent transmit clock configuration. In this mode, the links in the IMA group use at least two clock sources.

Description Use the ima-clockcommand to configure the clock mode of the IMA group.

Use the undo ima-clockcommand to restore the default, that is, CTC.

When the IMA group adopts ITC mode, you must set the clock mode of each member ATM E1/T1 link to slave with the clock slave command.

When the IMA group adopts CTC mode, you must set the clock mode of each member ATM E1/T1 link to master with the clock master command.

Example # Set the clock mode to ITC on IMA group 1.

<Sysname> system-view [Sysname] interface atm 5/0 [Sysname-Atm5/0] ima ima-group 1

[Sysname-Atm5/0] interface ima-group 5/1 [Sysname-Ima-group5/1] ima-clock itc

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3Com MSR 30, MSR 50 manual Ima-clock, Example # Add the link of ATM E1 interface 5/0 to IMA group