Introduction to Networking for NonStop S-Series Servers

Communications Product Concepts and
Components
Introduction to Networking for HP NonStop S-Series Servers—520670-005
2-26
ServerNet Wide Area Network (SWAN 2)
Concentrator
The SWAN 2 concentrator connects to the NonStop S-Series server through dual
10/100 Base-T Ethernet connections, which provide fault tolerance if an Ethernet link
or controller fails.
Supported Electrical and Physical Interfaces
Each SWAN 2 concentrator contains six communications line interface processors
(CLIPs). Each CLIP has an associated WAN backplane interface card (BIC). Together
they support two WAN serial ports, resulting in 12 lines that can support any
combination of the following electrical and physical interfaces:
•
RS-232
•
RS-449
•
V.35
•
X.21
Because each SWAN 2 line supports asynchronous, byte-synchronous, or
bit-synchronous transmissions independent of other lines, a single SWAN 2
concentrator performs the functions of multiple controllers.
SWAN 2 Concentrator Hardware Components
The SWAN 2 concentrator contains hardware components that you can replace
yourself, which are called customer-replaceable units (CRUs). Table 2-2 lists these
CRUs.
Note. The communications line interface processor (CLIP) is also known as a WAN logic
board (LB).
Note. The configuration rules allow any I/O protocol to share a CLIP with any other I/O
protocol. All combinations are fully supported.
Note. All the SWAN 2 concentrator CRUs can be replaced online without powering off the
SWAN 2 concentrator, except for the chassis CRU.