Avaya M770 Manual Do Utilizador
Chapter 5
Managing Physical Ports
Avaya M770 ATM Switch User’s Guide
51
To specify framing for a DS3 physical port, use the
pport set framing
command.
Configuring transmit rate limit for the M15-155 module
This command is supported only by M15-155 ATM modules.
The M770 ATM Switch hardware enables you to configure the peak output cell rate
of any port to be restricted, to control congestion on the network. This feature is
used for traffic shaping, mainly when you have a WAN connection.
For example, if a 155Mbps port is connected to another service at a lower rate
(<155Mbps), then this will require the data cell rate (ignoring idle cells) to be rate
limited at the output port of the switch.
The outcome of this command can be seen in “pport show” in the speed column.
The M770 ATM Switch hardware enables you to configure the peak output cell rate
of any port to be restricted, to control congestion on the network. This feature is
used for traffic shaping, mainly when you have a WAN connection.
For example, if a 155Mbps port is connected to another service at a lower rate
(<155Mbps), then this will require the data cell rate (ignoring idle cells) to be rate
limited at the output port of the switch.
The outcome of this command can be seen in “pport show” in the speed column.
Note:
You must disable the physical port before you can change, clear or reset any
physical port parameters. For more information about how to disable a physical
port, see Disabling a Physical Port on page 49.
port, see Disabling a Physical Port on page 49.
To configure Tx rate limiting for a physical port, use the
pport set txrate
command.
Note:
The M770 ATM Switch CAC feature is aware of any rate limit set on a port
and will not allow connections to be setup which could exceed the current limit. All
UBR connections are accepted as usual, however these may suffer cell loss if the
total traffic rate exceeds the current rate limit.
UBR connections are accepted as usual, however these may suffer cell loss if the
total traffic rate exceeds the current rate limit.
Command:
M4-DS3s8:/>pport set framing <pport> [CBIT | M23]
Example:
M4-DS3s8:/>pport set framing 8.2 CBIT
Parameters:
<pport id>
The physical port identifier in the form <slot>.<port number>.
CBIT
Sets the framing mode for the physical port to CBIT. The default
setting is CBIT.
setting is CBIT.
M23
Sets the framing mode for the physical port to M23.
Command:
M15-155s8:/>pport set txrate <pport> <rate>
Example:
M15-155s8:/>pport set txrate 8.3 100
Parameters:
<pport id>
The physical port identifier in the form <slot>.<port number>.
<rate>
To specify the port transmit rate in Kbits per second.
You can set the minimum rate capping to 64K bit per second.
You can set the minimum rate capping to 64K bit per second.