Manual

Layer 2 Tunnel Protocol Version 3
atm mcpt-timers
73
Cisco IOS Releases 12.0(29)S and 12.2(25)S
atm mcpt-timers
To set up the cell-packing timers, which specify how long the provider edge (PE) router can wait for cells
to be packed into a Multiprotocol Label Switching (MPLS) or Layer 2 Tunneling Protocol version 3
(L2TPv3) packet, use the atm mcpt-timers command in interface configuration mode. To disable the
cell-packing timers, use the no form of this command.
atm mcpt-timers [timeout-1 timeout-2 timeout-3]
no atm mcpt-timers
Syntax Description
Defaults By default, the timers are not set. If you enable the cell-packing timers, the default values for the PA-A3
port adapters are:
• OC-3: 30, 60, and 90 microseconds
• T3: 100, 200, and 300 microseconds
• E3: 130, 260, and 390 microseconds
Command Modes Interface configuration
Command History
Usage Guidelines For each timer, you specify the maximum cell packing timeout (MCPT). This value gives the
cell-packing function a limited amount of time to complete. If the timer expires before the maximum
number of cells are packed into an Any Transport over MPLS (AToM) or L2TPv3 packet, the packet is
sent anyway.
The timeout’s range of acceptable values depends on the ATM link speed. For the PA-A3 port adapter,
the range of values is:
• OC-3: 30, 60, and 90 microseconds
• T3: 100, 200, and 300 microseconds
• E3: 130, 260, and 390 microseconds
Examples The following example sets the MCPT timers to 10, 60, and 90 microseconds, respectively.
Router# interface atm 1/0
Router(config-if)# atm mcpt-timers 10 60 90
timeout (Optional) Specifies the timeout values for three timers in microseconds.
The timeout’s default and range of acceptable values depends on the ATM
link speed. See the “Usage Guidelines” section for more information.
Release Modification
12.0(25)S This command was introduced.
12.0(29)S Support for L2TPv3 sessions was added in Cisco IOS Release 12.0(29)S.