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CLI – The following example globally enables IP Port Priority service on
the switch, maps HTTP traffic (on port 1) to CoS value 0, and then
displays the IP Port Priority settings.
* Mapping specific values for IP Port Priority is implemented as an
interface configuration command, but any changes will apply to the all
interfaces on the switch.
Quality of Service
The commands described in this section are used to configure Quality of
Service (QoS) classification criteria and service policies. Differentiated
Services (DiffServ) provides policy-based management mechanisms used
for prioritizing network resources to meet the requirements of specific
traffic types on a per hop basis. Each packet is classified upon entry into
the network based on access lists, IP Precedence, DSCP values, or VLAN
lists. Using access lists allows you select traffic based on Layer 2, Layer 3,
or Layer 4 information contained in each packet. Based on configured
network policies, different kinds of traffic can be marked for different
kinds of forwarding.
All switches or routers that access the Internet rely on class information to
provide the same forwarding treatment to packets in the same class. Class
information can be assigned by end hosts, or switches or routers along the
path. Priority can then be assigned based on a general policy, or a detailed
examination of the packet. However, note that detailed examination of
packets should take place close to the network edge so that core switches
and routers are not overloaded.
Console(config)#map ip port 4-276
Console(config)#interface ethernet 1/1 4-187
Console(config-if)#map ip port 80 cos 0 4-277
Console(config-if)#end
Console#show map ip port ethernet 1/5 4-281
TCP port mapping status: disabled
Port Port no. COS
--------- -------- ---
Eth 1/ 1 80 0
Console#