Command Line Interface
in the transmit queue; this queue is used only if traffic rate to transmit on
this channel is greater than the real output rate (mainly due to a peak in
traffic reception or a requirement to limit the output traffic using ATM traffic
shaping), in these cases, buffers are stacked in the output queue.
Setting this parameter to a high value allows the system to manage traffic
peaks without losing data, but it may add an increased latency in buffers
transmission if a significant number of buffers are stacked in the output
queue.
Setting this parameter to a low value limits the transmission latency but it
may cause a loss of data in case of traffic peaks in reception. Using values
lower than 4 can harm the performance of the system.
User must also take care of the number of buffers in transmit queues
(Ethernet and ATM transmit queues), that must not exceed the total
number of buffers in the system (info given by the show buffers command),
because in case of memory shortage, traffic is dropped at frame reception
(out of memory condition) and this drop can affect all flows regardless of
their traffic type or priority, and this may alter the normal operation of the
board.
The number of system buffers reserved for each channel equals the
transmit queue size plus an extra buffer.
Transmit queue size is an integer in range [2-255].
Syntax
tx-queue-size size
Size
The new queue size, in range [2-255].
Default
16
Modes
Ethernet Interface configuration, ATM PVC configuration,
ATM PVC Range configuration, VC Class configuration
Example
To configure the transmit queue size to 64:
EXN400(config-vc-class)# tx-queue-size 64
2.9.3.11 oam
Description
This command is used to activate or deactivate OAM
support. When OAM support is activated, some other commands become
available to configure OAM services. These commands can perform OAM
cells exchange with a remote ATM node and inform the user of the status
of the exchange (see the show oam command in ATM VP and PVC
configuration modes, section 2.10.2.2 on page 50 and section 2.10.2.3 on
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