June 2003
Intermediate to advanced
432 pages
15h 56m
English
book
Cisco Catalyst QoS: Quality of Service in Campus Networks
by Mike Flannagan - CCIE® No. 7651, Richard Froom - CCIE No. 5102, Kevin Turek - CCIE No. 7284
Content preview from Cisco Catalyst QoS: Quality of Service in Campus Networks
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342 Chapter 9: QoS Support on the Catalyst 6500 MSFC and FlexWAN
Ethernet frame. Although the PFC does not perform any policing or QoS services for the
WAN traffic, it does switch WAN traffic at Layer 3. However, the PFC does not modify the
Layer 3 type of service (ToS) field when processing these packets.
Aside from the FlexWAN performing its own set of QoS functions, there are other things
to consider when deploying QoS on a 6500 with an MSFC and FlexWAN. When a frame is
sent either to the MSFC or FlexWAN, the Layer 2 CoS settings applied to that frame are
not maintained. By default, a 6500 equipped with a PFC I sets the CoS to zero if the frame ...
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