Add/Subtract Connection Record

Add/subtract connection records inform other members of a network of the connection status between two nodes. JES2 is the only networking product that sends add/subtract connection records. Members of a MAS configuration may have identical node names and can be distinguished by the member names. The add/subtract connection record can be included with other connection records in an NJE record. The data in the NJE record is not compressed or compacted.

Table 1. Fields in an Add/Subtract Connection Record
Field Name	Offset in Hex	Length	Type of Data	Default Value	Valid Range	Description
NCCRCB	0	1	binary	X‘F0’		All path manager RCBs contain X‘F0’.
NCCSRCB	1	1	char	none	none	The type of connection control record. Subtract connection records contain C‘N’. Add connection records contain C‘M’.
NCCADL	2	1	binary			Length of the response signon record from the RCB to the end of the add/subtract connection record.
NCCANODA	3	8	char			The name of the low-end node.
NCCAQULA	B	1	binary	1	1-7	Member number for the low-end (if shared spool).
NCCANODB	C	8	char			The name of the high-end node.
NCCAQULB	14	1	binary	1	1-7	Member number for the high-end (if shared spool).
NCCAEVNT	15	4	binary			The connection event sequence.
NCCAREST	19	2	binary		0-8000	The total node-to-node resistance.