Configuring Flood Rate Limit Action; Configuring Flow Control - Alcatel-Lucent OmniSwitch 9900 Series Network Configuration Manual

Configuring Ethernet Ports
For example:
-> interfaces 2/1/1 flood-limit bcast rate mbps 100
-> interfaces 2/1/2-5 flood-limit uucast rate pps 500
-> interfaces slot 3/1 flood-limit mcast rate cap% 50
The auto recovery has to enabled by configuring the low threshold. The high and low threshold when
configured, will have same type [mbps, pps, and percentage].
For example:
-> interfaces 1/1/1 flood-limit bcast rate mbps 60 low-threshold 40
-> interfaces 1/1/4 flood-limit uucast rate mbps 100 low-threshold 40
-> interfaces 1/1/5 flood-limit mcast rate pps 2000 low-threshold 1000

Configuring Flood Rate Limit Action

The following section describes how to apply action, when a port reaches storm violated state. You can set
an "action" for a singe port or a range of ports.
For example:
-> interfaces 1/1/1 flood-limit bcast action shutdown
-> interfaces 1/1/4 flood uucast action trap
-> interfaces 1/1/11 flood-limit all action shutdown
-> interfaces 1/1/14 flood mcast action default
When the action is set as "shutdown", it specifies that when high threshold is violated, the port needs
to be put in blocked state. When the action is set as "trap", it specifies that when high threshold is
crossed, the trap will be sent with the violation reason. Similarly, when the action is set as "default", it
specifies that when traffic reaches high threshold, packets above that rate will be dropped.

Configuring Flow Control

The interfaces pause
duplex mode. Configuring flow control is done to specify whether or not an interface transmits, honors, or
both transmits and honors PAUSE frames. PAUSE frames are used to temporarily pause the flow of traffic
between two connected devices to help prevent packet loss when traffic congestion occurs between
switches.
Note that if autonegotiation and flow control are both enabled for an interface, then autonegotiation
determines how the interface processes PAUSE frames. If autonegotiation is disabled but flow control is
enabled, then the configured flow control settings apply.
By default, flow control is disabled. To configure flow control for one or more ports, use the interfaces
pause command with one of the following parameters to specify how PAUSE frames are processed:
•
tx—Transmit PAUSE frames to peer switches when traffic congestion occurs on the local interface. Do
not honor PAUSE frames from peer switches.
•
rx—Allow the interface to honor PAUSE frames from peer switches and temporarily stop sending
traffic to the peer. Do not transmit PAUSE frames to peer switches.
•
tx-and-rx—Transmit and honor PAUSE frames when traffic congestion occurs between peer switches.
For example, the following command configures ports 1/1 through 1/10 to transmit and honor PAUSE
frames:
OmniSwitch AOS Release 8 Network Configuration Guide
command is used to configure flow control (pause) settings for ports that run in full
Configuring Ethernet Port Parameters
December 2017 page 1-7