Expand Configuration and Management Manual (H06.03+)

Configuring Expand-Over-SNA Lines
Expand Configuration and Management Manual—529522-002
11-5
Gigabit Ethernet ServerNet Adapter (GESA)
Gigabit Ethernet ServerNet Adapter (GESA)
The Gigabit Ethernet ServerNet adapter (GESA) is a single-port ServerNet adapter
that provides Gigabit connectivity between Integrity NonStop NS-series systems and
Ethernet LANs. A GESA can be directly installed in slots 51 through 54 of an I/O
enclosure and slots 53 and 54 of a processor enclosure. The data transfer rate is
limited to 10 Mbps when the GESA is connected to a SWAN concentrator, but a data
transfer rate of 10/100 Mbps is possible when the GESA is connected to a SWAN 2
concentrator. For information about the GESA, refer to the LAN Configuration and
Management Manual.
Gigabit Ethernet 4-Port ServerNet Adapter (G4SA)
The Gigabit Ethernet 4-port ServerNet adapter (G4SA) is a multiport ServerNet
adapter that provides Gigabit connectivity between Integrity NonStop NS-series
systems and Ethernet LANs. A G4SA can be directly installed in slots 1 through 5 of an
I/O adapter module (IOAM). Since there are two IOAMs in an IOAM enclosure, a total
of 10 G4SAs can be installed in an enclosure. The G4SA replaces the Ethernet 4
ServerNet adapter (E4SA), Fast Ethernet ServerNet adapter (FESA), and the Gigabit
Ethernet ServerNet adapter (GESA). The G4SA is the only LAN adapter supported for
the IOAM enclosure, and it cannot be installed in an Integrity NonStop NS-series
enclosure. The data transfer rate is limited to 10 Mbps when the G4SA is connected to
a SWAN concentrator, but a data transfer rate of 10/100 Mbps is possible when the
G4SA is connected to a SWAN 2 concentrator. For information about the G4SA, refer
to the LAN Configuration and Management Manual.
ServerNet Wide Area Network (SWAN) Concentrator
The SWAN concentrator is a communications device that provides wide area network
(WAN) connections. HP recommends that you configure the SWAN concentrator in the
same processor pair as the Expand line-handler processes.
For information about the SWAN concentrator, refer to the WAN Subsystem
Configuration and Management Manual.
Topology Considerations
An Expand-over-SNA network must be configured as a logical fully connected mesh. In
a single-line path configuration, you configure one Expand-over-SNA line-handler
process for each destination node in the network. In a multi-CPU configuration, you
configure multiple Expand-over-SNA line-handler processes, usually in separate
processors, for each destination node in the network. In a multi-line path configuration,
you configure a path that consists of multiple lines between the source and destination
nodes.
In Figure 11-2, a single-line path is configured between node \A and node \C; a multi-
CPU path that consists of two path is configured between node \A and node \B; and a
multi-line path that consists of three lines is configured between node \B and node \C.