NonStop S-Series Planning and Configuration Guide (G06.29+)

System Components
HP NonStop S-Series Planning and Configuration Guide—523303-021
4-21
SEBs and MSEBs
MSEB Description
MSEBs are supported only on the G06.09 and later RVUs.
The MSEB has six slots that can contain replaceable plug-in cards (PICs). Early-model
MSEBs have four fixed ports using a serial-copper interface.
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 Metro 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.
Using MMF PICs and cables, systems support distances up to 200 meters (656 feet)
between processor enclosures and between processor and I/O enclosures.
Using SMF cables, NonStop S76000, NonStop S86000, and later servers, support
distances of up to 5 kilometers (3 miles) between nodes in a Metro Cluster. Also,
NonStop S76000, S86000, and later servers, support a distance of 200 meters
between processor enclosures and 5 kilometers between processor and I/O
enclosures.
The NNA PIC for Metro Clusters can be installed only in the ServerNet 6 position.
For more information about Metro Clusters including that use the star topologies and
HP NonStop Cluster Switch (model 6770), refer to the ServerNet Cluster Manual. For
more information about Metro 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).