
Configuring VoIP QoS
246 Administration for the Avaya G250 and Avaya G350 Media Gateways
The G250/G350 offers both RTP header compression, for reducing the amount of bandwidth
needed for voice traffic, and TCP and UDP header compression, for reducing the amount of
bandwidth needed for non-voice traffic.
For header compression purposes, any UDP packet with an even destination port within a
user-configurable range of ports, is considered an RTP packet.
The G250/G350 enables decompression whenever compression is enabled. However, when
enabling header compression on a Frame Relay interface, you must first verify that the remote
host is also employing header compression. Header compression on a Frame Relay interface
does not check what the remote host is employing. Thus, it may compress headers even when
the remote host is not configured to decompress headers.
You can configure how often a full header is transmitted, either as a function of time or of
transmitted compressed packets.
Header compression configuration options
The G250/G350 offers two options for configuring header compression:
●
IP Header compression (IPHC) method, as defined by RFC 2507. IPHC-type compression
applies to RTP, TCP, and UDP headers.
●
Van Jacobson (VJ) method, as defined in RFC 1144. VJ compression applies to TCP
headers only.
Note:
Note:
VJ compression and IPHC cannot co-exist on an interface, and IPHC always
overrides VJ compression. Thus, if you define both VJ compression and IPHC,
only IPHC is enabled on the interface regardless of the order of definition.
Table 67: Header compression support by interface
Interface type
Supported compression methods
Serial
PPP
IPHC and VJ
Sub-Frame-Relay with IETF
encapsulation
IPHC only
Sub-Frame-Relay with non-IETF
encapsulation
RTP header compression using the IPHC
method, and TCP header compression using
the VJ method
Dialer
IPHC and VJ
Содержание Media Gateway G250
Страница 1: ...Administration for the Avaya G250 and Avaya G350 Media Gateways 03 300436 Issue 5 June 2008 ...
Страница 24: ...Contents 24 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 32: ...Introduction 32 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 38: ...Configuration overview 38 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 128: ...Basic device configuration 128 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 210: ...Configuring Standard Local Survivability SLS 210 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 244: ...Configuring logging 244 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 258: ...Configuring VoIP QoS 258 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 354: ...Configuring Emergency Transfer Relay ETR 354 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 370: ...Configuring SNMP 370 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 402: ...Configuring advanced switching 402 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 486: ...Configuring monitoring applications 486 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 548: ...Configuring the router 548 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 664: ...Configuring policy 664 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 682: ...Configuring policy based routing 682 Administration for the Avaya G250 and Avaya G350 Media Gateways ...
Страница 686: ...Setting synchronization 686 Administration for the Avaya G250 and Avaya G350 Media Gateways ...