Base Switch Topologies; Symmetrix Capacity Application; Capacity Expansion (Fan-In) Topology - EMC Connectrix EC-1200 Planning Manual

Connectrix Topologies
4

Base Switch Topologies

Symmetrix Capacity
Application
4-4
Connectrix v6.02 Planning Guide
The Symmetrix Capacity application uses a fan-in logical topology.
This topology expands capacity in the Symmetrix environment by
giving a single Host Bus Adapter in a file server access to a large
number of Symmetrix ports. The Symmetrix ports may span a single
Symmetrix or span multiple Symmetrix.
Figure 4-2 shows a fan-in rate of 4. Each Symmetrix in the figure
connects one Fibre Channel director (FA) port to a shared server port.
The set of switch ports, the switch port that connects to the server,
and the switch ports that connect to the Symmetrix make up a fan-in
group. The concept of a fan-in group is used when considering the ISL
loading issues in the design of a mutiswitch fabric.
Server

Capacity Expansion (Fan-in) Topology

Figure 4-2
In the example in Figure 4-2, assume that several host I/O slots are
needed for tape, clustering, and networking connections, leaving
only one slot available for attachment to four Symmetrix units. By
using an ED-140M or ED-64M Director, the system provides
connectivity to a large pool of Symmetrix storage, minimizing the
server I/O slot requirement.
Fan-in rates of up to 16 Symmetrix FA ports per host have been tested
(per HBA/OS). The latest maximums are maintained in the EMC
Support Matrix.
Connectrix
Symmetrix 1, FA-1A
Symmetrix 2, FA-1A
Symmetrix 3, FA-1A
Symmetrix 4, FA-1A