Chapter 25 - Quality of Service (QoS)
IEEE 802.1q
266
Mediatrix 1204
•
qosVbdDiffServ
These variables are 1 octet scalar ranging from 0 to 255. The DSCP default value should be
101110. This results in the DS field value of 10111000 (184d).
This default value would result in a value of “101” precedence bits, low delay, high throughput, and
normal reliability in the legacy IP networks (RFC 791, RFC 1812). Network managers of legacy IP
networks could use the above-mentioned values to define filters on their routers to take advantage
of priority queuing. The default value is based on the Expedited Forwarding PHB (RFC 2598)
recommendation.
2.
Set the value you want to use.
You can find references on DS field under the IETF working group DiffServ. For more information,
please refer to the following RFC documents and the
MIB Reference
manual:
•
Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers
(RFC 2474)
•
An Architecture for Differentiated Services (RFC 2475)
•
Assured Forwarding PHB Group (RFC 2597)
•
An Expedited Forwarding PHB (RFC 2598)
IEEE 802.1q
The 802.1q standard recommends the use of the 802.1q VLAN tags for Ethernet frames traffic prioritization.
VLAN tags are 4-byte headers in which three bits are reserved for priority indication. The values of the priority
bits shall be provisioned.
The 802.1q standard comprises the 802.1p standard.
It is the network administrator’s responsibility to provision the Mediatrix 1204 with standard and correct values.
You can also set these parameters via the web interface, as described in
“802.1q Configuration” on page 93
X
To enable the IEEE 802.1q user priority configuration:
1.
In the
qosIeee8021q
group
of the
qosMIB
, locate the following variables:
•
qosSignalingIeee8021qEnable
•
qosVoiceIeee8021qEnable
•
qosT38FaxIeee8021qEnable
•
qosVbdIeee8021qEnable
2.
Set the value of these variables to
enable
.
The corresponding user priority configuration is enabled.
3.
In the
qosIeee8021q
group
of the
qosMIB
, locate the following variables:
•
qosSignalingIeee8021qUserPriority
•
qosVoiceIeee8021qUserPriority
•
qosT38FaxIeee8021qUserPriority
•
qosVbdIeee8021qUserPriority
These variables are 1 octet scalar ranging from 0 to 7. The 802.1q default priority value should be
6 for both signalling and media packets.
4.
Set the value you want to use.
Note:
RFC 3168 now defines the state in which to set the two least significant bits in the TOS byte. On the
other hand, this RFC only applies to TCP transmissions and the bits are thus set to “0” in the Mediatrix 1204.
This has the following effects:
•
The TOS values for UDP packets are the same as in the MIB.
•
The TOS values for TCP packets are equal to the closest multiple of 4 value that is not greater than the
value in the MIB.
Summary of Contents for Mediatrix 1204
Page 6: ...Mediatrix Telecom a Division of Media5 Corporation Reference Manual...
Page 26: ...Preface About this Manual End User Technical Support xxvi Mediatrix 1204...
Page 27: ...Installation and Web Page Configuration...
Page 28: ...Page Left Intentionally Blank...
Page 50: ...Chapter 1 Installation Verifying the Installation 24 Mediatrix 1204...
Page 98: ...Chapter 4 Web Interface SIP Parameters SIP Authentication 72 Mediatrix 1204...
Page 127: ...SNMP Configuration...
Page 128: ...Page Left Intentionally Blank...
Page 162: ...Chapter 8 IP Address and Network Configuration Ethernet Connection Speed 136 Mediatrix 1204...
Page 170: ...Chapter 9 SIP Servers Presence Compositor Server 144 Mediatrix 1204...
Page 174: ...Chapter 10 DNS SRV Configuration DNS SRV Oriented Settings 148 Mediatrix 1204...
Page 196: ...Chapter 12 Configuration File Download Configuration File Example 170 Mediatrix 1204...
Page 220: ...Chapter 14 Gateway Configuration Detecting a Far End Disconnect 194 Mediatrix 1204...
Page 240: ...Chapter 16 Voice Transmissions User Gain 214 Mediatrix 1204...
Page 288: ...Chapter 23 Telephony Attributes Delayed Hot Line 262 Mediatrix 1204...
Page 294: ...Chapter 25 Quality of Service QoS VLAN 268 Mediatrix 1204...
Page 298: ...Chapter 26 Syslog Daemon Syslog Daemon Configuration 272 Mediatrix 1204...
Page 302: ...Chapter 27 Statistics RTP Statistics 276 Mediatrix 1204...
Page 319: ...Appendices...
Page 320: ...Page Left Intentionally Blank...
Page 332: ...Appendix B Standard Hardware Information Warranty 306 Mediatrix 1204...
Page 336: ...Appendix C Cabling Considerations RJ 11 Telephone Cable 310 Mediatrix 1204...
Page 372: ...Appendix E Glossary Wide Area Network WAN 346 Mediatrix 1204...
Page 390: ...Index W 364 Mediatrix 1204...