QoS Configuration Example
February 22, 2008
Page 24 of 29
Figure 7 QoS Configuration Example
A
core
profile
for
the
router
and
an
edge
profile
for
the
switch
provide
for
the
difference
in
rate
limiting
needs
between
the
enduser
and
aggregation
devices.
A
call
setup
profile
rate
limiting
the
setup
aspect
of
the
VoIP
call.
Each
edge
and
core
VLAN
profile
will
be
configured
for
default
CoS
5
(best
default
priority
for
voice
and
video),
the
addition
of
its
associated
VLAN
to
its
egress
VLAN
list,
and
ToS
overwrite.
We
will
create
a
separate
CoS
for
both
the
edge
and
core
to
handle
ToS,
rate
‐
limit
and
queue
configuration
for
these
devices.
The
H.323
call
setup
profile
will
be
configured
so
that
TCP
call
setup
traffic
on
the
TCP
destination
port
1720:10.0.0.1
of
its
gigabit
link
will
be
configured
for
the
proper
rate
limit
on
that
port.
Using
NetSight
Policy
Manager,
configure
the
policy
roles
and
related
services
as
follows:
Setting the VoIP Core Policy Profile (Router 1)
For
DFE
router
1,
we
configure
a
separate
policy
for
VoIP
Core.
VoIP
Core
policy
deals
with
packets
transiting
the
core
network
using
VoIP
VLAN
22.
For
role
VoIPCore
we
will:
•
Configure
VoIPEdge
‐
VLAN22
as
the
name
of
the
role.
•
Set
default
CoS
to
5.
•
Set
the
default
access
control
to
VLAN
22.
•
Enable
TCI
overwrite
so
that
ToS
will
be
rewritten
for
this
policy.
