ServerNet Cluster Manual

Fiber-Optic Cable Information

ServerNet Cluster Manual—520575-003

G-5

ServerNet Cluster Connections

The following sections list other requirements for the two types of ServerNet cluster

connections that use single-mode fiber-optic cables.

Node Connections

The node connections use ports 0 through 7 on the cluster switch. The range of the

node connections is up to 80 meters. The reason this distance is less than the

distance that single-mode fiber can support is due to the hardware implementation of

the ServerNet protocol.

Cluster Switch Connections

The cluster switch connections use ports 8 through 11 of the cluster switch. These

ports allow multiple cluster switches on a fabric to be connected in a multilane link.

Cables up to 80 meters in length are supported for multilane links in all ServerNet

Cluster topologies. However, you can use longer cables for a multilane link if the

requirements in Table 2-4 on page 2-11 are met.

Caution. Do not exceed the 80-meter maximum cable length between a ServerNet node and

a cluster switch. Doing so can cause multiple, unrecoverable link failures to and from the node

that is in violation of the distance limit.