Association Set Considerations
....................................................................................................................................................................................................................................
Overview
This section discusses association set engineering considerations.
Equipage
The number of association sets is determined by the number of SIP
packet groups that use SCTP as the transport layer to the far office.
There is a one-to-one correspondence between SIP packet groups and
association sets when SCTP transport is used.
An association set must contain at least one SCTP association, and
may contain up to 64 associations. The number of associations in an
association set is determined by the number of unique SCTP
endpoints in the switches at each end of the packet group. If there is
one SCTP endpoint in each switch, then there can only be one
association in one association set for one packet group between the
two switches. If either (or both ends) support more than one SCTP
endpoint, additional associations may be provisioned between each
pair of near and far SCTP endpoints to allow for loadsharing and
additional reliability when the associations are grouped in an
association set. There is an office-wide maximum limit of 1023
associations. The maximum number of associations could all be
provisioned on a single SCTP near endpoint if there were the
maximum number of different far-end SCTP endpoints with which to
communicate; however, each association consumes resources on the
SIP PH.
When engineering association sets between two offices, the offices
should agree on their interface. Specifically:
• define the association sets that are needed between the offices,
• agree which packet group uses which association set, and
• have each office independently provision packet groups to use
the agreed upon association sets.
Engineering Considerations
....................................................................................................................................................................................................................................
4-14
Lucent Technologies 235-200-118
Issue 3.02B, March 2007
To Next Page
Loading...
Need help?
General
