Chapter 6. Enterprise Extender 87
Each transmission link connecting two nodes or subnodes is assigned two
ANR labels, one at each end. When the transmission link is activated, each
node assigns an ANR label for the outbound direction. For example, in Figure
54 on page 86, Node A assigns the label 47 for the direction from Node A to
Node B and Node B assigns label 52 for the direction from Node B to Node A.
In contrast to the RTP-capable nodes where the RTP connection ends or
begins, an intermediate ANR-capable NN doesn’t do any route setup, session
level error recovery or flow control.
In contrast to the FID2 transmission units used for APPN, the NLPs aren’t
segmented in the intermediate ANR-capable NNs, thanks to the information
the origin RTP node ...