Port Shaping - GE T1000 Technical Manual

GE Reason Switches
11.5

Port Shaping

196

Weight: shows the value in percentage of the weight of the queues at that
port. If operation of the port is Strict Priority, then the "-" character will be
displayed as the weight value, which means no weight process being used.
If operation of the port is weighted, then displayed values are from allowed
queues, from CoS 0 to 5.
Port Shaping and Port Scheduler menus work together to allow configuring
priority type at each port and each queue. While Port Scheduler shows each port
mode and queues weight, Port Shaping shows each port shaper values divided
in queues. That is, rate values configured at port scheduler are displayed at this
menu. By default, Reason Switches operates in strict priority. If necessary, up to
6 queues (except 6 and 7 CoS queues) can be weighted, thus packet drop
process should weight the queues instead of waiting higher level queues to be
empty. Besides, weighting process will store excess data in an internal buffer to
be sent later, thus this function would require memory available to store frames.
Possible configurations are as follows.
Port: indicate the ports to be configured at this row. Port field is a
o
hyperlink that allows accessing QoS Egress Port Scheduler and
Shapers settings. Port scheduler menu allows configuring port to
operate in Strict Priority scheduler mode or 6 Queues Weighted
mode. Possible configuration after clicking Port number hyperlink
are as follows:


Scheduler Mode: indicates which mode port scheduler is
operating. Each port can be freely configured to operate
as strict or weighted mode. Allowed values are Strict
Priority and 6 Queues Weighted. Strict priority means that
lower priority queue will only start forwarding frames
after higher priority queue is empty. 6 queues weighted
means that queues CoS 0 to 5 will be weighted and
frames will be randomly discarded based on the weight
configuration;
Queue Shaper: indicates queue rate to be used by
shaping function. Each queue has its own shaper
configuration. If congestion happens at a given queue at
the port, queue shapers will perform switching functions
to guarantee that average traffic at that queue does not
excess Queue Shaper
configuration are as follows:

Enable: enable Queue Shaper function at the Cos
queue. Checkbox selected means function
enabled to that queue, and checkbox empty
means disabled;
Chapter 7 – Configuration
Rate configured.
REASON SWITCHES-TM-EN-3
Possible