© Copyright Lenovo 2018
Chapter 32: Virtual Router Redundancy Protocol
457
Hot-Standby Configuration
The
primary
application
for
VRRP
‐
based
hot
‐
standby
is
to
support
Network
Adapter
Teaming
on
your
server
blades.
With
Network
Adapter
Teaming,
the
NICs
on
each
server
share
the
same
IPv4
address,
and
are
configured
into
a
team.
One
NIC
is
the
primary
link,
and
the
others
are
backup
links.
For
more
details,
refer
to
the
NetXen
10
Gb
Ethernet
Adapter
documentation.
A
hot
‐
standby
configuration
allows
all
processes
to
failover
to
a
standby
switch
if
any
type
of
failure
should
occur.
All
Virtual
Interface
Routers
(VIRs)
are
bundled
into
one
Virtual
Router
group,
and
then
they
failover
together.
When
there
is
a
failure
that
causes
the
VRRP
Master
to
failover
to
the
Standby,
then
the
original
primary
switch
temporarily
disables
the
internal
server
links,
which,
in
turn,
causes
the
NIC
teams
to
failover
as
well.
Note:
When
using
hot
‐
standby
redundancy,
peer
switches
should
have
an
equal
number
of
connected
ports.
If
hot
‐
standby
is
implemented
in
a
looped
environment,
the
hot
‐
standby
feature
automatically
disables
the
hot
‐
standby
ports
on
the
VRRP
Standby.
If
the
Master
switch
should
failover
to
the
Standby
switch,
it
would
change
the
hot
‐
standby
ports
from
disabled
to
forwarding
,
without
relying
on
Spanning
Tree
or
manual
intervention.
Therefore,
Spanning
Tree
must
be
disabled.
illustrates
a
common
hot
‐
standby
implementation
on
a
single
blade
server.
Notice
that
the
blade
server
NICs
are
configured
into
a
team
that
shares
the
same
IPv4
address
across
both
NICs.
Because
only
one
link
can
be
active
at
a
time,
the
hot
‐
standby
feature
controls
the
NIC
failover
by
having
the
Standby
switch
disable
its
internal
ports
(holding
down
the
server
links).
Figure 58.
Hot
‐
Standby
Configuration
Enterprise
Routing Switch
Server 2
Active
Switch 1
Hot Standby
Switch 2
NIC 1 IP = 10.0.1.1
Server 1
NIC 1 IP = 10.0.1.2
IF 1: 174.14.20.110
IF 2: 10.1.1.110
VIR 1: 174.14.20.100
VIR 2: 10.1.1.100
IF 1: 174.14.20.111
IF 2: 10.1.1.111
VIR 1: 174.14.20.100
VIR 2: 10.1.1.100
= Active Links
= Standby Links
Internet
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