Avaya M770 사용자 설명서

Chapter 7

Managing Module Hardware

Avaya M770 ATM Switch User’s Guide

97

Under normal circumstances, the early packet discard threshold should not 

be changed. Before attempting to change the thresholds, contact Avaya Technical 
Support.

The Cell Loss Priority (CLP) mechanism allows low priority cells (with CLP set to 1) 
to be discarded first. The CLP threshold cannot be set by the user.

Displaying the packet discard threshold for modules

To display the current packet discard thresholds for all modules, use the

hardware 

packetdiscard

command. 

The information displayed is the percentage threshold that is currently set for Early 
Packet Discard (EPD). The default EPD threshold is 80%. When the switch’s buffers 
are more full than the EPD threshold then the switch module will discard NEW 
AAL5 frames on UBR circuits.

Changing the packet discard thresholds for modules

You can change the default thresholds for packet discard.
•

Decreasing the percentage will cause packets to be discarded at an earlier stage 
during congestion.

•

Increasing the percentage will cause the congestion to reach a higher level 
before the packet discard threshold is reached and packets are discarded.

•

To disable packet discard enter 0 for EPD.

Under normal circumstances, the packet discard thresholds should not be 

changed. Before attempting to change the thresholds, contact Avaya Technical 
Support.

To change the packet discard thresholds for an module, use the

hardware 

packetdiscard <epd%>

command. 

Command:

M15-155s8:/>hardware packetdiscard

Output:

EPD 80%

Command:

M15-155s8:/>hardware packetdiscard <epd%>

Example:

M15-155s8:/>hardware packetdiscard 70

Parameters: 

<epd%>

The new percentage threshold for EPD.