TCP/IP (Parallel Library) Configuration and Management Manual

SCF Reference for Parallel Library TCP/IP
HP NonStop TCP/IP (Parallel Library) Configuration and Management Manual—522271-006
5-24
ADD SUBNET Command for TCPMAN
•
The SLSA subsystem must be operational for the ADD command to complete
successfully. Refer to the LAN Configuration and Management Manual for more
information.
•
When a subnet is added, a corresponding route to this subnet is added
automatically. Both the subnet and the route are placed in the STOPPED state. To
initiate the operation of the object, you must start it with the START command.
•
When adding a SLSA subnet type, the DEVICENAME does not begin with a dollar
sign ($) character.
•
Subnets from the conventional TCP/IP and Parallel Library TCP/IP environments
cannot share a LIF.
•
See Subnet-Level Binding: How to Isolate Subnets in a Single-IP Environment on
page 2-4 for information about using the subnet IP address as opposed to
INADDR_ANY when binding applications.
The following are some guidelines to use when configuring Ethernet failover:
•
The ALTER SUBNET command is required with the ADD SUBNET command to
link the two LIFs for failover.
•
When selecting the LIF pair for the failover SUBNET pair, you should select LIFs
on different adapters.
•
When using Fast Ethernet adapters and Gigabit Ethernet adapters connected
directly to Ethernet switches, failover recovery time might be impacted by the
spanning tree feature used in a switch.
•
When using multiple failover pairs on the same network subnet and adding static
routes, its best to add a copy of each route to one SUBNET in each failover pair.
This increases the availability of the routes should both SUBNETs comprising a
failover pair become unavailable. It also allows Parallel TCPIP Library TCP/IP to
distribute outbound connections over the failover pairs when the source IP address
is not selected by the application.
•
Ethernet failover might not function when directly connected to a firewall that uses
Ethernet-address (MAC)-to-IP address filtering. This problem can be overcome by
adding a router between the LIFs and the firewall.
•
When configuring multiple, shared IP fail over pairs, the reserved IP address
cannot be shared between pairs.