Displaying Acl Rules; Ingress Policing - Avaya P580 User Manual

Multiservice switches

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Displaying ACL Rules

Use the show access-lists command to display the ACL rules in an ACL.

The syntax of this command is:

> show access-lists [<access-list-name>]

Policing makes it possible for you to limit the bandwidth for ingress queues.

You limit the bandwidth by specifying the guaranteed bit rate for a port. If

this bit rate is exceeded, the switch drops the excess packets.

For example, if you set policing on an ingress queue to be 5 Mbps, and

traffic exceeds that 5 Mbps rate, all traffic that exceeds the 5Mbps is

Only 80-series modules that are licensed for routing support the policing

The policing algorithm includes a normal burst threshold. This threshold

sets the size of bursts that is guaranteed transfer.

The switch uses queue 0 to forward protocol packets (ARP, VRRP, OSPF,

and so on) to the supervisor module. If you enable policing on queue 0, be

sure to allocate the queue enough bandwidth for management packets and

learned packets. Failure to allocate enough bandwidth to the queue may

result in poor network performance. Do not disable this queue by allocating

it 0 bits per second (bps). If you disable the queue, all protocol packets and

learned packets are discarded before reaching the supervisor module.

For information about how to set up policing, see

later in this chapter.

* Note: Avaya recommends that you do not set a port using policing as

the source port or mirror port for a port mirror. When the

switch limits the bandwidth of a port, packets are subject to

random drop. If packets from a source port or mirror port are

dropped, the mirror traffic may not match the source traffic.

User Guide for the Avaya P580 and P882 Multiservice Switches, v6.0