Avaya G450 Overview And Specification page 45

Feature
Weighted Random Early Detection (WRED)
Policy
Policy-based routing
RTP Header Compression
TCP Header Compression
Inter-Gateway Alternate Routing (IGAR)
April 2020 Avaya G450 Branch Gateway Overview and Specification
Comments on this document? infodev@avaya.com
Description
Branch Gateway uses WRED on its ingress and
egress queues to improve the network
performance. WRED reduces host transmission
speed when the ingress Branch Gateway queues
are congested.
Each interface on Branch Gateway can have four
active policy lists:
• Ingress Access Control List
• Ingress QoS List
• Egress Access Control List
• Egress QoS List
Access control lists define which packets should be
forwarded or blocked. QoS lists change the DSCP
and 802.1p priority of routed packets according to
packet characteristics.
Branch Gateway features policy-based routing,
which uses a policy-list structure to implement a
routing scheme based on traffic source, destination,
type, and other characteristics. You can use policy-
based routing lists (PBR lists) to determine routing
of packets that match the rules defined in the list.
Common applications include separate routing for
voice and data traffic, routing traffic originating from
different sets of users through different Internet
connections, and defining backup routes for classes
of traffic.
Branch Gateway saves the bandwidth using RTP
compression. It also enhances the efficiency of
voice transmission over the network by
compressing the headers of RTP packets,
minimizing overhead and delays involved in the
RTP implementation.
Branch Gateway uses TCP header compression to
reduce the amount of bandwidth needed for non-
voice data. TCP header compression can be
applied either as a part of RTP Header
Compression via IPCH, or using the Van Jacobson
method defined in RFC 1144.
Branch Gateway uses PSTN as an alternative to
the WAN interface under certain definable
conditions. In providing an alternate routing
mechanism, IGAR preserves the call internal
makeup so that it can be successfully terminated to
its original internal destination.
WAN services
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