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Control blocks are either defined in the NCP generation definition or dynamically allocated.
Control blocks are initially defined in the NCP generation definition. They are defined within pools that contain particular types of control blocks; for example, you may have a pool of control blocks for physical units (PUs).
When a pool is defined in the NCP generation definition it can contain a number of control blocks that are reserved for later use. As they are eventually used and there is no more room left in the pool, additional control blocks can be dynamically defined and placed in buffers.
NCPView provides you with a view of the current pool usage so that it is possible to change the pool size definition in the NCP generation definition and allocate more control blocks.
If dynamic control block allocation is enabled by coding DYNPOOL in the BUILD definition statement of the NCP generation definition, NCP is able to allocate more control blocks than the generation definition allows. This is useful when there are not enough resources defined in the generation definition to meet a sudden demand. It should be noted that because dynamic control blocks use up buffers from the buffer pool, NCP performance can be degraded during periods of high demand. It is therefore recommended that your NCP generation definition has all of the resources you expect to be required, already defined.
The following pool names are available:
Dependent LU-LU Boundary Session
Dependent SSCP-LU Boundary Session
Independent Boundary Session Block
Dependent Boundary Session Block Extension
Independent Boundary Session Block Extension
Committed Buffers Block
Communications Rate
Common PU Block
Common PU Block Extension
Common PU Block Extension for Embedded Blocks
Common Physical Unit Block Extension 2
IP/DLC Interface Control Block
Flow Control Parameter Table
ODLC Frame-relay Logical Resources
Buffer pool (GPB)
Host Route Entry
Local Address Entry
LU Block Extension Data Area
ODLC Link Control Block Extension
Frame Relay Logical Links
Token-ring Logical Links pool
Independent LU Network Address
Dependent LU
LU Terminal Node Extension
LU Dynamic Reconfiguration
LU Block Extension
Network Interconnect Extension
Programmed Resource LU Block Extension
Network Names Table
NPA Counter Queue Element
NPA Counter Queue Element Extension
NPA Counter Queue Element Extension 2
Network Route Entry
Frame Relay Physical Station NPM
NPA Session Counters
NPA Session Counter Extension
Network Vector Table
ODLC LAN Logical Resources
Route Interface Control Block
Resource Vector Table
ODLC Stations
Subnetwork Route Entry
SOCA Station Information
Virtual Route Access Table
Vector Table of SNPs (SSCP - NCP session control blocks)
Virtual Route Vector Table
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