SNAX/XF and SNAX/APN Configuration and Management Manual

Configuring for Token-Ring Support
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
9-20
Link Station Role Negotiation
You may change any one or more of the settings in order to optimize performance. You
are advised not to override the defaults without a careful study of the traffic and the
types of applications using the processes.
The following example shows a single SAPINFO attribute with two SAPs defined.
SAPINFO (SAP %H04, MAXLS 20, DFT 30.30,DFC 100, DFS 10; &
SAP %H08, MAXLS 4 )
The first allows a maximum of 20 link stations and overrides the defaults for data
aggregation. The second SAP allows a maximum of four link stations but makes no
changes to the data aggregation.
For a description of SAPINFO, see Section 14, Attributes for SNAX/XF and
SNAX/APN.
Link Station Role Negotiation
SNAX/APN allows you to specify STATION NEGOTIABLE on lines connected to a
Token-Ring network. Role negotiation is implemented through XID exchanges. TLAM,
which interfaces directly with the Token-Ring network, forwards XID3 frames to the
SNAX/APN line-handler process, which handles role negotiation on the NonStop
system. Role negotiation remains transparent to the Token-Ring network itself. For a
description of STATION, see Section 14, Attributes for SNAX/XF and SNAX/APN.
Line Attributes With Token-Ring Specific Values
The RECSIZE line attribute used in the SCF ADD and ALTER commands has unique
values for Token-Ring. For a description of RECSIZE (Line Objects), see Section 14,
Attributes for SNAX/XF and SNAX/APN.
Remote PU Attributes
The G06.03 RVU of SNAX/APN introduced new names for existing Token-Ring SCF
attributes. Table 9-2
lists the renamed attributes.
Table 9-2. Renamed Token-Ring SCF Attributes
Token-Ring Attribute Ethernet and Token-Ring Attribute
TRMAXIN LNMAXIN
TRMAXOUT LNMAXOUT
TRMAXOUTINCR LNMAXOUTINCR
TRMAXRETRY LNMAXRETRY
TRRMTADDR LNRMTADDR
TRSSAP LNSSAP