Expand Configuration and Management Manual (H06.21+, J06.10+)

Planning a Network Design
Expand Configuration and Management Manual — 529522-013
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Congestion Control Feature
The variable packet size feature allows you to configure a maximum packet size, which
is used for both single-packet and multipacket frames, on a per-path basis. This
feature effectively overrides the packet size calculated from the FRAMESIZE modifier
value.
For a complete technical overview of the variable packet size feature, see Variable
Packet Size Feature on page 17-67.
Congestion Control Feature
Congestion control provides improved throughput over LANs and other networks that
are subject to varying delays. It also improves the response time for message transfers
and provides a more efficient error-recovery mechanism. HP recommends that the
congestion control feature be enabled for Expand-over-IP connections and for Expand
line-handler processes that are members of a multi-CPU path.
For a complete technical overview of the congestion control feature, see Congestion
Control Feature on page 17-69.
Designing the Network Topology
The pattern of interconnection of systems in a network is called the network topology.
Your goals when designing a network topology should include:
•
Minimizing communications costs
•
Minimizing response time
•
Satisfying the throughput requirements of networked applications
•
Achieving a satisfactory level of network reliability
Common Network Topologies
Several topologies can be used in the design of computer networks:
•
Star
•
Split-Star
•
Tri-star
•
Tree
•
Ring
•
Bus
•
Mesh
•
Mixed
The star, tree, ring, bus, and mesh topologies are illustrated in Figure 3-4 on
page 3-13. A mixed topology is a combination of more than one type of topology
. The
split-star and tri-star topologies are extensions of the star topology.
Note. The Integrity NonStop NS1000 server does not support ServerNet clusters.