Connect the Front End for a Dual-Controller Storage Center
Dell Compellent
107
Legacy Mode with Dual-Fabric Fibre Channel
Use
two
fabrics
with
legacy
mode
to
prevent
a
FC
switch
failure
or
controller
failure
from
causing
an
outage.
In
this
configuration,
four
fault
domains
are
spread
across
both
controllers.
Each
fault
domain
contains
sets
of
primary
and
reserve
paths
(P1
‐
R1,
P2
‐
R2,
P3
‐
R3,
and
P4
‐
R4).
To
provide
redundancy,
the
primary
port
and
the
corresponding
reserve
port
in
a
fault
domain
must
connect
to
the
same
fabric.
When
MPIO
is
configured
on
the
FC
servers,
the
primary
paths
provide
redundancy
for
a
single
port
or
cable
failure.
The
reserved
paths
provide
redundancy
for
single
controller
failure.
Prerequisites
Each
controller
must
have
two
available
FC
front
‐
end
ports
for
each
FC
fabric.
Steps
1
Connect
each
FC
server
to
both
FC
fabrics.
2
Connect
fault
domain
1
(shown
in
orange)
to
fabric
1.
Primary
port
P1
:
Controller
A,
slot
1,
port
1
→
Fabric
1
Reserved
port
R1
:
Controller
B,
slot
1,
port
1
→
Fabric
1
3
Connect
fault
domain
2
(shown
in
blue)
to
fabric
1.
Primary
port
P2
:
Controller
B,
slot
2,
port
1
→
Fabric
1
Reserved
port
R2
:
Controller
A,
slot
2,
port
1
→
Fabric
1
4
Connect
fault
domain
3
(shown
in
green)
to
fabric
2.
Primary
port
P3
:
Controller
A,
slot
1,
port
2
→
Fabric
2
Reserved
port
R3
:
Controller
B,
slot
1,
port
2
→
Fabric
2
5
Connect
fault
domain
4
(shown
in
purple)
to
fabric
2.
Primary
port
P4
:
Controller
B,
slot
2,
port
2
→
Fabric
2
Reserved
port
R4
:
Controller
A,
slot
2,
port
2
→
Fabric
2
6
Configure
FC
zoning
to
meet
the
legacy
mode
zoning
requirements.
