Nortel BayStack 460 Switch, Руководство по управлению устройством

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12 Policy management on the Nortel Ethernet Switch 460, Ethernet Switch 470, and BPS
318396-4.1
Table 4 describes the allowable User Priority Update actions, based on the DSCP
specification for the same action.
Update Drop Precedence actions
Table 5 describes the allowable Drop Precedence Update actions under different
interface classes, relative to BPS software versions and traffic classifications.
‡ Egress Map - Use COS value from DSCP to COS mapping, based on DSCP from incoming
packet.
** Ignore - Ignore user priority value.
Table 4 Allowable User Priority Update actions (underlined text denotes EPM
default setting, where multiple options exist)
DSCP Ignore DSCP Mark Drop
Update User Priority Update 0-7 * , Egress
Map † , Ignore ‡
* Update 0-7 - Update user priority with value 0-7.
† Egress Map - Use COS value from DSCP to COS mapping, based on DSCP from incoming
packet.
‡ Ignore - Ignore user priority.
Defaults **
** Defaults - Use COS value from DSCP to COS mapping, based on DSCP value in action.
Ignore ‡
Table 5 Drop Precedence Update action behavior (underlined text denotes EPM
default setting, where multiple options exist)
Device software
version
Untrusted Trusted Unrestricted
BPS 2.0, 3.0, 3.1
Layer 3 Update 1-8 * ,
Defaults †
* Update 1-8 - Update drop precedence with value 1-8.
† Defaults - Use COS value from DSCP to COS mapping, based on DSCP value in action.
Egress Map ‡ Refer to Table 6 .
Layer 2
Tagged Update 8,
Update 1-8
*
Ignore ** Update 1-8 * , Ignore **
UnTagged Ignore ** Ignore ** Update 1-8 * , Ignore **