NonStop S-Series Planning and Configuration Guide (G06.26+)

System Components
HP NonStop S-Series Planning and Configuration Guide—523303-017
4-21
SEBs and MSEBs
MSEB Description
MSEBs are supported only on the G06.09 and later RVUs.
The MSEB has four fixed ports using a serial-copper interface and six slots that can
contain replaceable plug-in cards (PICs).
An MSEB provides all the functions of a six-connector SEB. MSEBs can communicate
with SEBs as well as other MSEBs.
The PICs allow for a variety of interfaces. The available interfaces:
•
Emitter-coupled logic (ECL)
•
Serial-copper (SCu)
•
Single-mode fiber optic (SMF)
•
Multimode fiber optic (MMF)
•
Node-numbering agent (NNA) for ServerNet clusters
All the PIC interfaces can be mixed in a system. ECL and SCu cables are limited to a
distance of 25 meters (82 feet) apart. For systems using MMF PICs and cables,
distances up to 200 meters are supported between processor enclosures and between
processor and I/O enclosures. Also using NonStop S76000 and NonStop S86000, and
later, distances of up to 5 km between processors enclosures are supported with
ServerNet clusters.
Using NonStop S76000 and NonStop S86000 servers, and later, distances of up to 5
kilometers between nodes in a ServerNet cluster are supported. Also NonStop S76000
and NonStop S86000 servers, and later, support a distance of 200 meters between
processor enclosures and 5 kilometers between processor and I/O enclosures using
SMF cables.
The NNA PIC for ServerNet clusters can be installed only in the ServerNet 6 position.
For more information about ServerNet clusters including that use the star topologies
and HP NonStop Cluster Switch (model 6770), refer to the ServerNet Cluster Manual.
For more information about ServerNet clusters that use the layered topology and HP
NonStop ServerNet Switch (model 6780), refer to the ServerNet Cluster 6780 Planning
and Installation Guide. For distance limitations between an MSEB and a cluster switch,
refer also to these documents.
The MSEB has these indicator LEDs:
Color Function
Green Is lit when the power is on.
Amber Is lit when the MSEB is not fully functional. At initial power on, this
LED remains lit until the MSEB has been successfully configured
by the SP; then the LED should become unlit. If this LED remains
lit, replace the MSEB.
Green, above each
ServerNet connector
Is lit to signify that the link is alive (link alive).