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

System Components
HP NonStop S-Series Planning and Configuration Guide—523303-021
4-19
SEBs and MSEBs
SEBs or MSEBs and Fabric Connections
For fault tolerance, SEBs are installed in an enclosure in pairs: one for the X fabric and
one for the Y fabric. Each SEB provides access to either the X fabric or the Y fabric,
but not both.
The relationships between SEB slots and ServerNet fabrics are:
SEBs and MSEBs can be installed in slots 51, 52, 53, and 54. The slot assignments
depend upon the topology of the system. For specific information, see Slot
Assignments for Slots 51 Through 54 on page 4-27.
Six-Connector SEB Description
The SEBs has six 50-pin ServerNet connectors. Five of these connectors are used for
connecting to other enclosures. The connector SERVERNET 6 is not used externally.
SEB ports use only the ECL interfaces.
A 6-connector SEB has these indicator LEDs:
SEB Slot Number ServerNet Fabric
51 X
52 Y
53 X
54 Y
Note. Information about the function of a six-connector SEB applies also to the MSEB.
Descriptions and figures showing six-connector SEBs are also valid for MSEBs unless
indicated otherwise.
Color Function
Green Is lit when the power is on.
Amber Is lit when the SEB is not fully functional. At initial power on, this
LED remains lit until the SEB has been successfully configured by
the service processor (SP). Then the SP turns the LED off.
Yellow, above each
ServerNet connector
Is currently unused.