Layer 3 Switch Prioritizes Traffic According to Centrally-Set Policies

Non-802.1p/Q

Enabled NIC

Untagged Frame

Priority

Queues

1

2

3

L3 Switch:

Prioritizes Packet

L2Switch

Traffic Prioritization is usually less critical at the edge, between an end system and it’s switch connection

4

Traffic Prioritization is usually most critical at congestion points:

- the building LAN collapse point (router)

- where the building connects to the campus backbone
- in front of central server farms

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