Administrator's Guide

Configuring HyperFabric
Configuring HMP for Transparent Local Failover Support
Chapter 4100
Case 2: Switch Failure (see Figure 4-8)
Consider the following illustration where node A is connected to node D
with traffic being routed through the HF adapter 1 on both the nodes (A
and D), and the HF switch 1 fails. HMP transparently fails over traffic
through the other available switch (HF switch 0). This is possible only if
at least one adapter of the card pairs on both the nodes (HF adapter 0 of
the Card Pair 0 on nodes A and D) is physically reachable (through the
HF switch 0).
Figure 4-8 Switch Failover
HF
adapter 1
node C
HF
adapter 0
HF
adapter 1
HF
adapter 1
HF
adapter 0
HF Switch 0
HF Switch 1
HF
adapter 1
node A
node B
node D
HF
adapter 0
HF
adapter 0
{
{
{
{
Card Pair 0
Card Pair 0
Card Pair 0 Card Pair 0