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outbound VLAN tag. If a DSCP Policy is congured to apply

to the inbound DS codepoint (i.e., the codepoint has been

're-mapped'), the priority assignment and outbound queueing

will be that specied by the new Policy's codepoint in the

DSCP table, and the Differentiated Services eld in the

outbound packet will be changed to the new value.

Using 'no type-of-service diff-services <000000...111111>'

removes the re-mapping assignment, i.e., a new DSCP Policy

will no longer be applied to the specied codepoint. To

remove a priority association from a codepoint altogether,

the 'no dscp-map <000000.111111>' function must be used.

o diff-services <000000|000001...111111> - The value of the upper

6 bits in the ToS eld.

o dscp <000000|000001...111111> - Re-maps a given inbound Differentiated

Services codepoint to the specied DSCP Policy and codepoint on

outbound.

Next Available Options:

■ ip-precedence -- In IP-Precedence mode, IPv4 packets are classified and given a QoS priority

based on the upper 3 bits of the IP ToS field. The priority association is automatic and cannot

be changed: IP-Precedence 802.1p ToS Bits Priority -------------------------------- 111 7 (Highest) 110

6 101 5 100 4 011 3 010 0 (Normal) 001 2 (Low) 000 1 (Lowest) (p. 387)

■ diff-services -- In IP Differentiated Services (Diffserv) mode, IPv4 packets are classified and

given a QoS priority based on the upper 6 bits of the IP ToS field from the packets as they enter

the switch. The assignment of Diffserv Codepoints to 802.1p priorities is done via the qos

dscp-map command. Any Diffserv Codepoint in an inbound IPv4 packet can be re-mapped to

a different codepoint (and its associated 802.1p priority) on outbound. This is done by using

the syntax: qos type-of-service diff-services <000000...111111> dscp <000000..111111> (p. 385)

qosCommand Line Interface Reference Guide