LevelOne VOI-7010 Manual - Page 52

Information Protocol.

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User Priority (802.1P) CFI Eight classes are defined by 802.1p. Highest priority is seven, which might go to network-critical traffic such as Routing Information Protocol. Values five and six might be for delay-sensitive applications such as interactive video and voice CFI (Canonical format indicator). A 1-bit indicator that is always set to zero for Ethernet switches. CFI is used for compatibility between Ethernet and Token Ring networks. If a frame received at an Ethernet port has a CFI set to 1, then that frame should not be bridged to an untagged port. Note The prioritization specification works at the media access control (MAC) framing layer of the OSI model. To be compliant with 802.1p, Layer 2 switches must be capable of grouping incoming LAN packets into separate traffic classes. 46

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46
User Priority
(802.1P)
Eight
classes are defined by 802.1p.
Highest priority is
seven
, which might go
to network-critical traffic such as Routing
Information Protocol.
Values
five
and
six
might be for
delay-sensitive applications such as
interactive video and voice
CFI
CFI (Canonical format indicator). A 1-bit
indicator that is always set to zero for
Ethernet switches. CFI is used for
compatibility between Ethernet and Token
Ring networks. If a frame received at an
Ethernet port has a CFI set to 1, then that
frame should not be bridged to an
untagged port.
Note
The prioritization specification works at the media
access control (MAC) framing layer of the OSI
model. To be compliant with 802.1p, Layer 2
switches must be capable of grouping incoming
LAN packets into separate traffic classes.