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

Contents

HP NonStop S-Series Planning and Configuration Guide—523303-017

6. ServerNet Communication Pathways

When CRU Removal Might Stop Communications 6-1

PMF CRUs and Communication Pathways 6-2

ServerNet Router Inside a PMF CRU 6-2

PMF CRU Pathways Within One Enclosure 6-5

PMF CRU Pathways Within One Enclosure: One PMF CRU Removed 6-5

PMF CRU Pathways Between Enclosures 6-6

PMF CRU Pathways With a PMF CRU Removed From the Outer

Tetrahedron 6-7

PMF CRU Pathways With a PMF CRU Removed From the Inner Tetrahedron 6-8

SEBs, MSEBs, and Communication Pathways 6-9

SEB Pathways Within One Enclosure 6-9

SEB Pathways Within One Enclosure: One SEB Removed 6-10

SEB Pathways Between Enclosures 6-11

SEB Pathways Between Enclosures: One SEB Removed 6-12

Communication Pathways in Different Topologies 6-15

Pathway Between Groups 01 and 31, Tetra 8 Topology 6-16

Pathway Between Groups 01 and 31, Tetra 16 Topology 6-17

Determining the Communication Pathways in Your System 6-18

7. Enclosure Arrangements and Cable Connections

Considerations for Enclosure Arrangements 7-1

Example Enclosure Arrangements: Tetra 8 Topology 7-2

Example Enclosure Arrangements: Tetra 16 Topology 7-3

Choosing ServerNet Cable Lengths 7-4

Methods of Estimating Cable Lengths 7-4

Same-Row Connections

7-5

Different-Row Connections

7-9

Power-On Cables 7-10

Powering On 7-12

Powering Off 7-12

Requirements for Grounding 7-12

Considerations for Expanding a System 7-13