Expand Configuration and Management Manual (G06.24+)

Configuring Expand-Over-SNA Lines

Expand Configuration and Management Manual—523347-008

11-4

NonStop TCP/IP Process

The NonStop TCP/IP subsystem provides TCP/IP data communications connectivity.

NonStop TCP/IP processes are used by the following LAN adapters: Ethernet 4

ServerNet adapters (E4SAs), Fast Ethernet ServerNet adapters (FESAs), Gigabit

Ethernet ServerNet adapters (GESAs), Gigabit Ethernet 4-port ServerNet adapters

(G4SAs), and SWAN concentrators. The NonStop TCP/IP processes that support the

E4SAs, FESAs, GESAs, G4SAs and SWAN concentrators are preconfigured and

started during the system load sequence.

For information about the NonStop TCP/IP, Parallel Library TCP/IP, and NonStop

TCP/IPv6 subsystems, refer to the TCP/IPv6 Configuration and Management Manual,

the TCP/IP (Parallel Library) Configuration and Management Manual, and the

TCP/IPv6 Configuration and Management Manual.

Local Area Network (LAN) Driver and Interrupt Handlers (DIHs)

NonStop TCP/IP processes can interface to the network through the ServerNet LAN

Systems Access (SLSA) subsystem. The SLSA subsystem provides QIO-based driver

and interrupt handlers (DIHs) that allow NonStop TCP/IP processes to connect to a

LAN adapter. The SLSA subsystem is preconfigured and started during the system

load sequence.

For information about the SLSA subsystem, refer to the LAN Configuration and

Management Manual.

Ethernet 4 ServerNet Adapter (E4SA)

The E4SA is a double-high ServerNet adapter that supports four Ethernet interfaces

and communicates with multiple processors through its dual ServerNet interfaces to

the ServerNet fabrics. Two E4SAs are used to connect a SWAN concentrator to a

processor. For information about the E4SA, refer to the LAN Configuration and

Management Manual.

Fast Ethernet ServerNet Adapter (FESA)

The FESA is a single-port adapter that provides connectivity between NonStop

S-series servers and Fast Ethernet 802.3u LANs. The data transfer rate is limited to 10

Mbps when the FESA is connected to a SWAN concentrator, but a data transfer rate of

10/100 Mbps is possible when the FESA is connected to a SWAN 2 concentrator. For

information about FESAs, refer to the LAN Configuration and Management Manual.