Gigabit Ethernet ServerNet Adapter Installation and Support Guide

Introduction to the Gigabit Ethernet ServerNet
Adapter (GESA)
Gigabit Ethernet Adapter Installation and Support Guide—523628.005
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Overview of the GESA
Overview of the GESA
The Gigabit Ethernet ServerNet adapter (GESA) is a single-port ServerNet adapter
that provides Gigabit connectivity between NonStop S-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.
Two versions of the GESA are available based on the transmission medium: copper or
fiber:
•
3865 GESA-C (523477): single-port copper version compliant with the
1000 Base-T standard (802.3ab) and the following Ethernet LANs:
°
802.3 (10 Base-T)
°
802.3u (100 Base-T)
•
3865 GESA-F (523478): single-port fiber version compliant with the 1000 Base-SX
standard (802.z)
GESA Features
•
Supports copper or fiber connectivity.
•
Supports jumbo frames up to a maximum transmission unit (MTU) size of 9,014
bytes. Jumbo frames are supported with Parallel Library TCP/IP and
NonStop TCP/IPv6 only.
•
Supports up to 16 processors concurrently accessing GESA adapters over
two-channel, fully fault-tolerant (ServerNet X and Y fabric) connections.
•
Adjusts automatically (auto-sensing feature) to 10/100 Mbps operation and can be
easily added to an existing network on a NonStop S-series server. (This feature
applies to GESA-C only.)
•
Provides automatic negotiation for full or half-duplex transmission. (This feature
applies to GESA-C only.)
•
Supports multiple communications protocols, including TCP/IP, Expand/IP,
IPX/SPX, Port Access Method (PAM), and Simple Network Management
Protocol (SNMP).
•
Provides an open interface for Asynchronous Wide Area Network (AWAN) and
ServerNet Wide Area Network (SWAN) attachment to a ServerNet interconnect.
The data transfer rate is 10 Mbps for SWAN and 10/100 Mbps for SWAN 2.
•
Operates with your existing NonStop S-series network infrastructure, including
other ServerNet adapters, cabling (customer-supplied), protocol stacks, and
user-written application code.
Note. GESAs (including GESA connections via S-series I/O enclosures) are not supported on
NonStop BladeSystems.