ServerNet Cluster 6770 Hardware Installation and Support Guide

Introduction to the ServerNet Cluster Switch (Model

6770)

ServerNet Cluster 6770 Hardware Installation and Support Guide—522544-002

1-5

Modular ServerNet Expansion Boards (MSEBs)

The MSEBs route ServerNet packets out of each node and onto the external

ServerNet fabrics. MSEBs are similar to system expansion boards (SEBs) but use

plug-in cards (PICs) to provide a choice of connection media (ECL, fiber-optic, or serial

copper). Fiber-optic ServerNet cables connect the MSEBs in each node to the

ServerNet II Switches. The MSEBs that connect to the ServerNet II Switches must be

installed in slot 51 (X fabric) and slot 52 (Y fabric) of the group 01 enclosure in each

node.

The plug-in card (PIC) in port 6 of the MSEB must contain the node-numbering agent

(NNA) field-programmable gate array (FPGA) for packet modification. The NNA FPGA

converts the addresses of the ServerNet packets routed to the external ServerNet

fabrics so that the packets can be routed to another node. Unlike the PICs in the

ServerNet II Switches, the MSEB PICs are customer-replaceable units (CRUs).

To install or replace MSEBs, refer to the online help for the SEB/MSEB replacement

guided procedure (TSM) or the online help for the Replace action of the MSEB (OSM).

For a detailed description of the MSEBs, refer to the NonStop S-Series Planning and

Configuration Guide.

ServerNet Cluster Switch

The ServerNet Cluster Switch, model 6770, consists of three components:

•

ServerNet II Switch on page 1-7 provides the ServerNet connections to the nodes

in a ServerNet cluster.

•

Uninterruptible Power Supply (UPS) on page 1-10 provides backup battery power

for the ServerNet II Switch.

Figure 1-4. MSEB Connections to the ServerNet II Switches

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X-Fabric

ServerNet II Switch

Y-Fabric

ServerNet II Switch

Group 01 MSEBs

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