3Com VCX v7111 User Manual page 77
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Also See for VCX v7111:
- User manual (245 pages) ,
- Installation manual (58 pages) ,
- Product manual (15 pages)
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Parameter
Proxy Load Balancing Method
[ProxyLoadBalancingMethod]
Proxy IP List Refresh Time
[ProxyIPListRefreshTime]
®
3Com
VCX V7111 VoIP Gateway User Guide
Description
Enables the usage of the Proxy Load Balancing mechanism. Valid options
include:
Disable [0] = Load Balancing is disabled (default).
Round Robin [1] = Round Robin algorithm.
Random Weights [2] = Random Weights.
When Round Robin (1) algorithm is used, a list of all possible Proxy IP
addresses is compiled. This list includes all entries in the ProxyIP table
after necessary DNS resolutions (including NAPTR and SRV, if
configured). This list can handle up to 15 entries.
After this list is compiled, the Proxy Keep-Alive mechanism (according to
EnableProxyKeepAlive and ProxyKeepAliveTime) is used to mark each
entry as Offline or Online. The balancing is only performed on Proxy
servers that are marked as Online.
All outgoing messages are equally distributed across the Proxy IP list.
REGISTER messages are also distributed unless a RegistrarIP is
configured.
The Proxy IP list is refreshed according to ProxyIPListRefreshTime. If a
change in the order of the entries in the list occurs, all load statistics are
erased and balancing starts over again.
When Random Weights (2) algorithm is used, the outgoing requests are
not distributed equally among the Proxies. The weights are received from
the DNS server by using SRV records. The gateway sends the requests in
such a fashion that each Proxy receives a percentage of the requests
according to its assigned weight.
Load Balancing is not used in the following scenarios:
The ProxyIP table includes more than one entry.
The only Proxy defined is an IP address and not an FQDN.
SRV usage is not enabled (DNSQueryType).
The SRV response includes several records with a different Priority
value.
Defines the time interval (in seconds) between refreshes of the Proxy IP
list. This parameter is used only when ProxyLoadBalancingMethod = 1.
The interval range is 5 to 2,000,000. The default interval is 60.
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