SNAX/XF and SNAX/APN Configuration and Management Manual

Configuring for Ethernet Support
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
10-13
The HP Implementation on NonStop Systems
To provide backward compatibility with existing configurations, the replaced token-ring
attributes will be accepted by SCF, but you are encouraged to use the newer names for
new and altered configurations. Regardless of how the attribute was specified on an
SCF ADD or ALTER command, the SCF INFO command will always display the newer
names, and for SDLC and X.25 objects, the values displayed for these attributes are
N/A.
The DFC, DFS, and DFT arguments of the SCF LNSSAP attribute are implemented by
token-ring, but they are not currently implemented by Ethernet; they may be specified
but they will be ignored. Otherwise, the Ethernet and token-ring attributes given in
Table 10-2 are equivalent to the retired token-ring attributes.
For Ethernet, the SCF line attribute RECSIZE is restricted to a value of 1500, the size
of the largest possible Ethernet frame. Regardless of what is specified for RECSIZE on
an SCF ADD or ALTER LINE command, SNAX forces the value to 1500. HP
recommends that you always use the default for line RECSIZE.
For Ethernet, the SCF PU attribute RECSIZE must not exceed line RECSIZE minus 4
bytes, 1496.
Like token-ring, the Ethernet SCF PU attribute ADDRESS must be specified and it
must be unique for all PUs subordinate to the line. Unlike SDLC and X.25, ADDRESS
is not a PU’s address, but rather it is used as an index into the array of PU data
structures. For token-ring and Ethernet, the PU’s address is the concatenation of its
MAC and SAP addresses.
Unlike X.25, the Ethernet SCF PU attribute ASSOCIATESUBDEV does not specify an
Access Method port. The first part of the argument ($abc) specifies the name of an
E4SA, GESA, G4SA, or FESA LIF object that the SNAX PU uses to communicate with
the Ethernet adapters. The second part of the argument (#xyz) is a value that you
supply that must be unique in the service manager’s domain. This value is used only
by SNAX, but HP recommends that you specify a value that will assist you in problem
determination, such as #L21PU2. Unique in the service manager’s domain means that
any PU defined subordinate to a line that is subordinate to a given service manager
Table 10-2. 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
TRT1 LNT1
TRT2 LNT2
TRTI LNTI