Network control block (NCB)
| Size in bytes: | 680 (X'2A8') |
| Pointed to by: | Chain based on TVTNCBADTRMNCBAD, DEVNCBAD, LINNCBAD |
| Function: | The NCB is the primary control block in a WSim network simulation. It contains information that applies to all resources defined in a network. One NCB is built for each network simulated by WSim. |
NETWORK CONTROL BLOCK |
Offsets |
Hex |
Type |
Len |
Name (Dim) |
Description |
|---|---|---|---|---|---|
0 |
(0) |
STRUCTURE |
664 |
NCB |
NETWORK CONTROL BLOCK |
0 |
(0) |
SIGNED |
2 |
NCBLENG |
LENGTH OF NCB |
2 |
(2) |
BITSTRING |
1 |
NCBFLAG1 |
FIRST FLAG BYTE |
1... .... |
NCBSTRTD |
NETWORK ACTIVE |
|||
12 |
(C) |
CHARACTER |
8 |
NCBNAME |
CONTROL BLOCK NAME |
20 |
(14) |
CHARACTER |
24 |
NCBHEADR |
INTERVAL REPORT HEADER |
44 |
(2C) |
ADDRESS |
4 |
NCBNXNCB |
NCB CHAIN LINK FIELD |
VARIOUS VALUES AND POINTERS |
|||||
100 |
(64) |
UNSIGNED |
4 |
NCBSWCH |
32 NETWORK SWITCHES |
104 |
(68) |
ADDRESS |
4 |
NCBLINAD |
ADDR OF FIRST LIN FOR NETWORK |
108 |
(6C) |
ADDRESS |
4 |
NCBUSER |
ADDR OF NETWORK WIDE USERAREA |
MISCELLANEOUS COUNTERS AND VALUES |
|||||
172 |
(AC) |
SIGNED |
2 |
NCBUSRLN |
LENGTH OF NETWORK USER AREA |
NCB DQE & TQE |
|||||
280 |
(118) |
ADDRESS |
4 |
NCBCTRAD |
NETWORK COUNTERS ADDRESS |
284 |
(11C) |
UNSIGNED |
1 |
NCBCNTRS |
MINIMUM NUMBER OF INDEX COUNTERS |
285 |
(11D) |
UNSIGNED |
1 |
NCBCNTRO |
NUMBER CODED ON CNTRS= OPERAND |
286 |
(11E) |
SIGNED |
2 |
NCBCTRLN |
LENGTH OF STORAGE FOR COUNTERS |
SEQUENCE AND INDEX COUNTER BLOCK |
|||||
0 |
(0) |
STRUCTURE |
* |
NCBCTRS |
SEQUENCE AND INDEX COUNTERS |
0 |
(0) |
UNSIGNED |
4 |
NCBSEQ |
NETWORK SEQUENCE COUNTER |
4 |
(4) |
UNSIGNED |
4 |
NCBSEQCT (*) |
NETWORK INDEX COUNTERS |