508
C
HAPTER
18: Q
UALITY
OF
S
ERVICE
(Q
O
S)
AND
R
ESOURCE
R
ESERVATION
P
ROTOCOL
(RSVP)
Layer 2
Switching
Modules
✓
Multilayer
Switching
Modules
qos classifier define
Defines a flow or nonflow classifier on a Multilayer Switching Module.
Valid Minimum Abbreviation
q cl def
Important Considerations
■
Classifiers
define how the module groups packets so that it can
schedule them with the appropriate service level. QoS supports flow
and nonflow classifiers:
■
Flow classifiers
apply to routed IP multicast and IP unicast packets.
You can define up to 100 flow classifiers. Each filter (address and
port pattern) in a flow classifier counts toward the limit.
■
Nonflow classifiers
apply to bridged or routed traffic that is
associated with a specific protocol (IP, TCP/IP, IPX, and AppleTalk) or
to a custom protocol (Ethertype or Destination Service Access
Point/Source Service Access Point (DSAP/SSAP). You can also use
them to apply IEEE 802.1p tag values to forwarded frames. You
can define up to 16 nonflow classifiers. All 16 nonflow classifiers
are in use by default.
■
The default classifier number is
499
.
You cannot remove or modify
this default classifier. However, you can remove any of the predefined
classifiers (for example, if you need another nonflow classifier). See
“qos classifier remove” later in this chapter for more information.
■
When you define a filter (address and port pattern) for a flow
classifier, select a source and destination start and end port ranges
that are as small as possible (for example, a single port). If the classifier
applies to a wide range of Transmission Control Protocol (TCP) or User
Datagram Protocol (UDP) ports, you increase the amount of classified
traffic on the module and consume valuable QoS resources.
■
A classifier can have only one control applied to it.
■
If you select
custom
when you define a nonflow classifier, you are
prompted to select the protocol by Ethertype or DSAP/SSAP. After you
select a protocol, you are prompted to provide the hexidecimal ranges.
Depending on the number of VLANs defined, you can define a maximum
of 3 custom protocols that can have controls applied to them. This
limitation does not apply to non-controlled custom protocols.
Summary of Contents for 4007
Page 1: ...http www 3com com Switch 4007 Command Reference Guide Part No 10013693 Published May 2000...
Page 14: ......
Page 22: ...22 ABOUT THIS GUIDE...
Page 34: ...34 CHAPTER 1 ADMINISTRATION OVERVIEW...
Page 78: ...78 CHAPTER 4 SIMPLE NETWORK MANAGEMENT PROTOCOL SNMP...
Page 100: ...100 CHAPTER 5 ETHERNET PORTS...
Page 174: ...174 CHAPTER 9 RESILIENT LINKS...
Page 322: ...322 CHAPTER 13 VIRTUAL ROUTER REDUNDANCY VRRP...
Page 476: ...476 CHAPTER 16 INTERNET PACKET EXCHANGE IPX...
Page 552: ...552 CHAPTER 18 QUALITY OF SERVICE QOS AND RESOURCE RESERVATION PROTOCOL RSVP...
Page 566: ...566 APPENDIX A TECHNICAL SUPPORT...