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NetStructure™ 480T Routing Switch User Guide
ESRP Options
ESRP options include:
• ESRP Host Attach
• ESRP Domains
• ESRP Groups
• Linking ESRP Switches
• Configuring ESRP and Multinetting
• ESRP and Spanning Tree
ESRP Host Attach
ESRP host attach (HA) is an optional ESRP configuration that
allows you to connect active hosts directly to an ESRP master or
standby switch.
Normally, the Layer 2 redundancy and loop prevention capabilities
of ESRP do not allow packet forwarding from the standby ESRP
switch. ESRP HA allows configured ports that do not represent
loops to the network to continue Layer 2 operation, independent of
their ESRP status.
The ESRP HA option is useful when you are using multi-homed
network interface cards (NICs) for server farms, and in conjunction
with high-availability server load balancing (SLB) configurations,
as shown in Figure 11.1.