Insufficient Link Capacity; Other Intranet Resource Considerations; Implement Qos In Ip Networks - Nortel 1000 Description, Installation And Operation Manual

Insufficient link capacity

Other intranet resource considerations

Implement QoS in IP networks

Some network management systems have network planning modules that
compute network flows in the manner just described. These modules provide
more detailed and accurate analysis, as they can take into account actual node,
link, and routing information. They also help assess network resilience by
conducting link and node failure analysis. By simulating failures and
re-loading network and re-computed routes, the modules indicate where the
network might be out of capacity during failures.
If there is not enough link capacity, implement one or more of the following
options:
• Use the G.723 codec series.
Compared to the default G.729AB codec with 30 ms payload, the G.723
codecs use 9% to 14% less bandwidth.
• Upgrade the link's bandwidth.
Bottlenecks caused by non-WAN resources are less frequent. For a more
complete assessment, consider the impact of incremental IP Trunk 3.01 (and
later) traffic on routers and LAN resources in the intranet. Perhaps the IP
Trunk 3.01 (and later) traffic is traversing LAN segments that are saturated,
or traversing routers whose CPU utilization is high.
Today's corporate intranets developed because of the need to support data
services, services which found a "best effort" IP delivery mechanism
sufficient. Standard intranets are designed to support a set of QoS objectives
dictated by these data services.
ITG engineering guidelines
IP Trunk Description, Installation, and Operation
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