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This soft copy for use by IBM employees only.
For the other ports:
One of the following three modes (ranges) can be selected:
•
VPI/VCI: 0 bit/14 bits (VPI=0, VCI=0 through 16383)
•
VPI/VCI: 4 bits/10 bits (VPI=0 through 15, VCI=0 through 1023)
•
VPI/VCI: 6 bits/8 bits (VPI=0 through 63, VCI=0 through 256)
For more details refer to 3.3.4, “Control Point V1.4” on page 31.
5.1.2 Supported Virtual Connection Types
Table 12 shows the type of virtual connections supported by the IBM 8285.
1 If a call setup request with asymmetrical bandwidth requirement is received,
the 8285 will establish the call with the higher peak rate used for both directions.
Table 12. Supported Connection Type by the A-CPSW Module
Connection Type Supported?
Unidirectional point-to-point No
Bidirectional point-to-point with symmetric bandwidth Yes
Bidirectional point-to-point with asymmetric bandwidth No 1
Unidirectional point-to-multipoint Yes
Bidirectional point-to-multipoint No
multipoint-to-multipoint No
5.1.3 Maximum Number of Connections Supported
The maximum number of supported connections depends on their type
(point-to-point or point-to-multipoint) and for point-to-multipoint connections on
the number of parties per connection. The following are the rules you can use to
determine the number of connections supported in your environment:
•
The IBM 8285 has 4,096 connection control blocks.
•
Each point-to-point connection requires two control blocks.
•
Each party on a point-to-multipoint connection requires one connection
control block.
•
The maximum number of point-to-point connections supported by an IBM
8285 with its expansion is 2,048 regardless the expansion unit installation.
•
The maximum number of point-to-multipoint trees supported is 127.
•
The maximum number of parties supported for all the point-to-multipoint
trees is 1024.
•
The maximum number of PVCs is 100.
•
The maximum number of point-to-point connection per media modules or
base unit is 2048 with Version 1.4 (was 992).
•
The maximum number of parties for point-to-multipoint connections for the
base unit or per media module is 1024.
•
The maximum number of point-to-point connection per 8285 port is 2048.
82 ATM Workgroup Solutions: Implementing the 8285 ATM Switch