Configuring Ports; Configuring Port Pool Parameters - Alcatel-Lucent 7750 SR OS Interface Configuration Manual

Configuring Ports

This section provides the CLI syntax and examples to configure the following:
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Configuring Port Pool Parameters

The buffer space is portioned out on a per port basis whether one or multiple MDAs share the
same buffer space. Each port gets an amount of buffering which is its fair-share based on the
port's bandwidth compared to the overall active bandwidth.
IOM with each MDA has a dedicated buffer space: iom-20g; iom2-20g
IOM with multiple MDAs share a buffer space: iom-10g; iom3-xp
This mechanism takes the buffer space available and divides it into a portion for each port based
on the ports active bandwidth relative to the amount of active bandwidth for all ports associated
with the buffer space. The number of ports sharing the same buffer space depends on the type of
IOM the pools are being created on and the type of MDAs populated on the IOM. An active port is
considered to be any port that has an active queue associated. Once a queue is created for the port,
the system will allocate the appropriate amount of buffer space to the port. This process is
independently performed for both ingress and egress.
Normally, the amount of active bandwidth is considered as opposed to total potential bandwidth
for the port when determining the ports fair share. If a port is channelized and not all bandwidth is
allocated, only the bandwidth represented by the configured channels with queues configured is
counted towards the bandwidth represented by the port. Also, if a port may operate at variable
speeds (as in some Ethernet ports), only the current speed is considered. Based on the above, the
number of buffers managed by a port may change due to queue creation and deletion, channel
creation and deletion and port speed variance on the local port or other ports sharing the same
buffer space.
7750 SR OS Interface Configuration Guide
Configuring Port Pool Parameters on page 155
Changing Hybrid-Buffer-Allocation on page 158
Configuring APS Parameters on page 159
Configuring Ethernet Port Parameters on page 161
Configuring SONET/SDH Port Parameters on page 164
Configuring Channelized Ports on page 167
Configuring DWDM Port Parameters on page 190
Configuring ATM Interface Parameters on page 197
Configuring OTU Port Parameters on page 195
Interface Configuration
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