Diffserv - Dell N1100-ON Reference Manual

DiffServ

Standard IP-based networks are designed to provide "best effort" data delivery
service. Best effort service implies that the network delivers the data in a
timely fashion, although there is no guarantee that it will meet the latency or
bandwidth requirements. During times of congestion, packets may be
delayed, sent sporadically, or dropped. For typical Internet applications, such
as email and file transfer, a slight degradation in service is acceptable and in
many cases unnoticeable. Conversely, any
degradation of service has undesirable effects on applications with strict
timing requirements, such as voice or multimedia.
Diffserv allows the network operator to classify and apply a distinguished
service to traffic based on a number of criteria. The distinguished service can
meter traffic and apply per hop behavior based upon the bandwidth
utilization and burstiness of traffic. In addition, preferential drop
characteristics can be configured in support of an assured forwarding
capability such that TCP clients are informed if they exceed the switch
buffering limits.
Commands in this Section
This section explains the following commands:
assign-queue
class
class-map
class-map rename
classofservice
dot1p-mapping
classofservice ip-
dscp-mapping
mark ip-dscp
mark ip-precedence match srcip
match class-map
match cos
match destination-
address mac
match dstip
match source-
address mac
match srcip6
match srcl4port
match vlan
mirror
Layer 2 Switching Commands
show class-map
show classofservice
dot1p-mapping
show classofservice ip-
dscp-mapping
show classofservice
trust
show diffserv
show diffserv service
interface
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