User guide

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5-13
S
MART
R
EDUNDANCY
S
MART
R
EDUNDANCY
Smart redundancy defines the behavior of switches equipped with redundancy Gigabit
Ethernet ports (for example, the Summit 24 and Summit48). When the switch becomes
operational, it attempts to establish connectivity on the primary link. If this fails, the
redundancy port is attempted. When connectivity is established (or re-established) on
the primary link, the primary link is used.
On the Summit48, which has two redundant Gigabit Ethernet ports, an additional
capability is provided when both ports are configured for load-sharing. Using this
configuration, the same failover actions apply simultaneously to both failover ports. For
example, if the primary connection on port 49 fails, the redundant port on both port 49
and 50 are activated simultaneously. When connectivity is re-established on the primary
links of both ports 49 and 50, the primary links are used.
Figure 5-1 shows a load-shared link with smart redundancy failover.
Figure 5-1: Load-shared link with smart redundancy failover
EW_047
Failover linksPrimary links
49R49
50R50