Table of Contents
Advertisement
128
C
5: C
HAPTER
ONFIGURING
Configuring
OC3/STM-1 UNI
Modules
P
B
S700 M
ATH
UILDER
ODULES
Figure 89 STX Module Configuration Menu
2 Select the appropriate numbers and enter the desired Congestion On and
Congestion Off thresholds for the priority queues you want to configure. The
ranges are 51%-100% for Congestion On and 0% to 50% for Congestion Off.
You cannot set congestion thresholds for Queue 0, which is the highest priority
queue. This ensures that the traffic passing through Queue 0 is preserved and
treated with highest priority.
The congestion settings indicate the threshold level of cell buffers.
When the congestion level of the cell buffer for a particular queue reaches the
n
Congestion On threshold, a congestion state is declared.
When the congestion level falls back to the Congestion Off threshold, the
n
congestion state is cleared.
When the congestion state is set to on, Early Packet Discard (EPD) is initiated
n
until Congestion State is set to Off.
For example, if you set the Congestion On and Congestion Off thresholds for a
queue to 90 and 45 respectively, a congestion state would be declared when the
cell buffer is 90% full and cleared when the cell buffer is 45% full.
The Congestion On and Congestion Off settings are on a per queue basis, but
once you set the congestion thresholds for a particular queue, those settings are
used for that queue for all cards.
Configuring an OC3/STM-1 UNI module involves the following tasks:
Configuring the card
n
Configuring the virtual interfaces
n
To configure an OC3/STM-1 UNI module, follow these steps:
1 From the List Card menu, select the slot number corresponding to the OC3/STM-1
UNI module to display the OC3/STM-1 Configuration menu, shown in Figure 90.
, P
,
A
ORTS
AND
PPLICATIONS
Advertisement
Table of Contents
