WAN Subsystem Configuration and Management Manual

Overview of the WAN Subsystem
WAN Subsystem Configuration and Management Manual—522463-011
2-6
WANBoot Process
For more information on the TFTP server process, refer to TFTP Server Process
Syntax on page 6-40.
WANBoot Process
The WANBoot process implements a BOOTP client and a BOOTP server for each
TCP/IP process that supports the SWAN concentrator. The WANBoot process assigns
Internet Protocol (IP) addresses to the SWAN concentrator.
In addition, the WANBoot process performs latent failure detection for the Ethernet
paths used to access the SWAN concentrator by periodically issuing status-probe
requests to the SWAN concentrator CLIPs that are assigned the same TCP/IP process
as the WANBoot process. The status probe is an SNMP GET request to retrieve the
CLIP configuration information.
WAN Shared Driver Procedures
The WAN shared driver procedures are a set of library procedures that are bound with
each IOP or process that uses the SWAN concentrator. These procedures provide an
interface to the TCP/IP process for an IOP, such as creating a socket to use for
accessing a WAN line on the SWAN concentrator. The WAN shared driver uses QIO or
file-system sockets to access the TCP/IP processes that support the SWAN
concentrator.
TCP/IP, Parallel Library TCP/IP, and NonStop TCP/IPv6
Parallel Library TCP/IP is an HP product that provides increased performance and
scalability (the previous TCP/IP product is referred to as conventional TCP/IP).
NonStop TCP/IPv6 provides the same functionality as Parallel Library TCP/IP with the
optional support of IPv6 addresses. NonStop TCP/IPv6 also provides the additional
feature of logical network partitioning (LNP).
Parallel Library TCP/IP or NonStop TCP/IPv6 can coexist with conventional TCP/IP on
NonStop S-series servers. The SWAN concentrator supports conventional TCP/IP,
Parallel Library TCP/IP, and NonStop TCP/IPv6 (only IPv4 addresses).
When using Parallel Library TCP/IP or NonStop TCP/IPv6, you can run IOPs in any
processor configured with Parallel Library TCP/IP or NonStop TCP/IPv6 (that is, any
processor containing a monitor object. Monitor objects are TCPMON or TCP6MON).
The advantage of Parallel Library TCP/IP or NonStop TCP/IPv6 is that all processors
have direct access to the SWAN concentrator. Hence, an IOP in any processor can
directly access the concentrator without having to access another processor containing
the TCP/IP process which owns the SUBNET.
Note. Parallel Library TCP/IP is not supported on Integrity NonStop NS-series servers. Parallel
Library TCP/IP is supported by the WAN manager process (G06.13 and later RVUs) on
NonStop S-series systems.