User guide

182 CHAPTER 8: PRIORITIZING NETWORK TRAFFIC
Determining Field
Values for
Applications
In order to create a new application definition, it is necessary to know the
field values that can be used to identify that application. Many vendors
now provide the information about the field values that their applications
use either in the application manual or on the vendor’s website to aid
firewall configuration. This information may also be used for creating the
application definition within the Prioritize Network Traffic Wizard.
If you cannot find the information from either the application manual or
the vendor’s website then there are various other websites that may
provide the information that you require. In particular, the IEEE are
responsible for allocating Ethernet type values. A list of the assigned
Ethernet type values can be found on the IEEE website:
http://www.ieee.org/
Similarly, as IANA (Internet Assigned Number Authority) are responsible
for allocating TCP and UDP port numbers, a list of known TCP and UDP
port numbers can be found on the IANA website:
http://www.iana.org/
The IANA website also contains a list of the known IP protocol numbers.
3Com Network
Administrator Service
Levels
3Com Network Administrator uses the service levels on the devices it
configures as shown in Tab le 19
.
Table 19 Service Levels Used by 3Com Network Administrator
The classifiers created by 3Com Network Administrator are mapped to
these service levels as follows:
■ Classifiers created for NBX traffic are mapped to the Voice service
level.
■ Classifiers created for applications or servers that have been selected
for prioritization are mapped to the Business Critical service level.
Service Level Queue Marking Value
2 Queue Device 4 Queue Device 802.1p DSCP
Voice 1 (High) 3 (High) 6 46
Business Critical 1 (High) 1 3 16
Drop ------------------ Traffic is dropped ------------------
3Com Network Administrator for HP OpenView.book Page 182 Wednesday, November 12, 2003 2:33 PM