User`s manual

IKS-6726 Featured Functions
3-39
The IKS-6726 supports inspection of layer 3 TOS and/or layer 2 CoS tag information to determine how to
classify traffic packets.
Queuing Mechanism
Setting Description Factory Default
Weight Fair IKS-6726 has 4 priority queues. In the weight fair scheme, an
8, 4, 2, 1 weighting is applied to the four priorities. This
approach prevents the lower priority frames from being starved
of opportunity for transmission with only a slight delay to the
higher priority frames.
Strict In the Strict-priority scheme, all top-priority frames egress a
port until that priority’s queue is empty, and then the next
lower priority queue’s frames egress. This approach can cause
the lower priorities to be starved of opportunity for transmitting
any frames but ensures all high priority frames to egress the
switch as soon as possible.
Weight Fair
Inspect TOS
Setting Description Factory Default
Enable/Disable This enables or disables the IKS-6726 to inspect the Type of
Service (TOS) bits in IPV4 frame to determine the priority of
each frame.
Enable
Inspect COS
Setting Description Factory Default
Enable/Disable This enables or disables the IKS-6726 to inspect the 802.1p
COS tag in the MAC frame to determine the priority of each
frame.
Enable
NOTE The priority of an ingress frame is determined in order by:
1. Inspect TOS
2. Inspect CoS
3. Port Highest Priority
NOTE The designer can enable these classifications individually or in combination. For instance, if a “hot” higher
priority port is required for a network design, “Inspect TOS” and “Inspect CoS” can be disabled. This setting
leaves only port default priority active, which results in all ingress frames being assigned the same priority on
that port.
CoS Mapping