Specifications

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Table 9. QoS on Gigabit Ethernet Line Cards (WS-X6724, WS-X6748)

WS-X6724 WS-X6748

Number of GE Ports 24 48

# Port ASIC’s on the linecard 2 4

# Physical Ports per Port ASIC 24 24

Per Port Buffering Yes Yes

Buffer on Receive Side 166KB 166KB

Buffer on Transmit Side 1.2MB 1.2MB

Transmit Queue Structure per port 1P3Q8T 1P3Q8T

Receive Queue Structure per port 1Q8T 1Q8T

Receive Queue Structure per port with DFC 2Q8T 2Q8T

Receive (RX) Strict Priority Queue No No

Transmit (TX) Strict Priority Queue Yes Yes

Figure 11. WS-X6748-GETX Linecard

These new linecards supports a strict priority queue on the transmit side for each port. A total of 1.33Mb of buffering

is available for each port. This is 166Kb is set aside for the receive queues, and 1.2Mb is set aside for the transmit

queues.

3.3.8. 10-Gigabit Ethernet Line Cards (WS-X6704-10GE)

The 4-port 10GE linecard (WS-X6704-10GE) was announced soon after the introduction of the Supervisor 720.

Details for the QoS implementation on this linecard are detailed below:

Table 10. - QoS on 10-Gigabit Ethernet Line Cards (WS-X6704-10GE)

WS-X6704

Number of 10 GE Ports 4

# Port ASIC’s on the linecard 4

# Physical Ports per Port ASIC 1

Per Port Buffering Yes

Buffer on Receive Side 2MB

Buffer on Transmit Side 14MB

Transmit Queue Structure per port 1P7Q8T

Receive Queue Structure per port 1Q8T

Receive Queue Structure per port with DFC 8Q8T

Receive (RX) Strict Priority Queue No

Transmit (TX) Strict Priority Queue Yes