TN-5516/5518 User’s Manual Featured Functions
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Port Highest Priority
Setting Description Factory Default
Enable/Disable Queue the port priority of ingress frames to “High” Disable
Inspect TOS
Setting Description Factory Default
Enable/Disable This enables or disables the TN-5500 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 TN-5500 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. Port Highest Priority
2. Inspect TOS
3. Inspect CoS
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
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