KB.15.15

Options for assigning priority

The packet-marking options for global TCP/UDP port-number classifiers include:

• 802.1p priority

• DSCP policy (Assigning a new DSCP and an associated 802.1p priority; inbound packets

can be IPv4 or IPv6.)

For a given TCP or UDP port number, you can use only one of the above options at a time. However,

for different port numbers, you can use different options.

TCP/UDP port number ranges

There are three ranges:

• Well-Known Ports: 0 - 1023

• Registered Ports: 1024 - 49151

• Dynamic and Private Ports: 49152 - 65535

For more information, including a listing of UDP/TCP port numbers, go to the Internet Assigned

Numbers Authority (IANA) website at:

www.iana.org

Then click on:

Protocol Number Assignment Services

P under Directory of General Assigned Numbers)

Port Numbers

Operating notes on using TCP/UDP port ranges

• Only 6 concurrent policies are possible when using unique ranges. The number of policies

allowed is less if ACLs are also using port ranges.

• No ranges allowed that include any port numbers configured as part of another QoS

application port number policy.

• An error message is generated if there are not enough hardware resources available when

configuring a policy.

• The entire range of configured port numbers must be specified when using the no form of the

command, for example:

HP Switch(config)#: qos udp-port range 1300 1399 dscp 001110

HP Switch(config)#: no qos range 1300 1399

Global QoS classifiers 247