The Workgroup Approach

How Stacks Work

Stackable hubs communicate with one another through proprietary interconnection cables. The cables used in Cabletron Systems’ stackable hub solution are called HubSTACK Interconnect Cables. In Ethernet stackable environments, these cables are short, multistrand cables with special, D-shaped connectors that attach to ports on the backs of the stackable hubs, as shown in Figure 3-3.In Token Ring stackable solutions, the interconnect cables are short twisted pair segments that connect each stackable unit directly to the base unit.

REAR VIEW

SEHI Managing 4 SEH Non-Intelligent Hubs

SEH100TX-22100BASE-TX HUB WITH LANVIEW®

OUT

SEH100TX INTERCONNECT

IN

SEH100TX-22100BASE-TX HUB WITH LANVIEW®

OUT

SEH100TX INTERCONNECT

IN

SEH100TX-22100BASE-TX HUB WITH LANVIEW®

OUT

SEH100TX INTERCONNECT

IN

SEH100TX-22100BASE-TX HUB WITH LANVIEW®

OUT

SEH100TX INTERCONNECT

IN

HubSTACK Interconnect Cable

SEHI100TX-22100BASE-TX HUB WITH LANVIEW®

OUT

SEHI100TX INTERCONNECT

IN

2094n03

Figure 3-3. HubSTACK Interconnect Cables

The HubSTACK cables handle the communications between stackable devices, including network traffic and management communications. The use of these custom, short cables allows the stack to act as a single repeater or concentrator. In essence, the cables and connectors used to chain the stackable hubs together mimic the operation of the backplane of a modular hub.

Stackables

3-5

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Cabletron Systems bridges, switches manual How Stacks Work, Rear View