TCP/IPv6 Configuration and Management Manual (G06.24+)

Manage the NonStop TCP/IPv6 Subsystem
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-008
6-23
Managing LNPs
From a systems perspective, the overall processor utilization should be less than in the
conventional TCP/IP environment because the number of dispatches and context
switches is minimized.
Managing LNPs
Implementing LNP makes configuring NonStop TCP/IPv6 more complex because each
LNP is considered independent of the others, each one must have its static routes
configured individually. If a default route is needed on one LNP that is equivalent to a
default route already added on another LNP, the default route still must be added.
LNPs are referred to by their LNP index value. The Default LNP has an index value of
zero (0). The first configured LNP has an index of one (1), and so on.
For example, assume these configuration of LNPs:
In addition to $ZSAM1 and $ZSAM2, suppose that TCP6SAM processes $ZSAM3,
$ZSAM4, and $ZSAM5 are added.
Applications that set the socket provider to $ZSAM1 have access to SUBNET SN1 and
only have access to IP address 172.17.215.27.
Applications that set the socket-provider name to $ZSAM2 only have access to
SUBNETs SN2 and SN3 and only have access to IP addresses 172.16.214.28 and
172.16.214.29.
Applications that set the socket provider name to either $ZSAM3, $ZSAM4, or
$ZSAM5 have access to SUBNETs SN4, SN5, and SN6. This is the default LNP.
While LNP provides an application with an isolated view of the world, LNP is not meant
to be a virtual TCP/IP stack. The TCP and UDP port ranges available to a TCP6MON
in the current TCP/IPv6 environment still apply when LNPs are configured. However,
the restriction that allowed only one application to bind to a TCP or UDP port in a
processor is changed so that if each application is using a different LNP, each is able
to use the port. The restriction now is that only one application in the processor can
use the same LNP. The restrictions that already apply to applications using the same
port between processors still apply for applications using the same LNP.
SUBNET Name/ LIF LNP Index IP Address TCP6SAM Name
SN1 / lan01 1 172.17.215.27 $ZSAM1
SN2 / lan02 2 172.16.214.28 $ZSAM2
SN3 / lan03 2 172.16.214.29 $ZSAM2
SN4 / lan04 0 (Default) 155.186.100.10 Null (not assigned)
SN5 / lan05 0 (Default) 155.186.100.11 Null (not assigned)
SN6 / lan06 0 (Default) 155.186.100.12 Null (not assigned)