CS485 Sylabus
Loop-free Ethernet switched networks
Interconnecting
(Ethernet) networks with Switches
Example network 1:
Notice that:
The
node
H
is
not
on a
network
that is
directly
attached
to
switch 1
But
H
can
still
be stored in the
forwarding table
of
switch 1
!!!
Node
H
resides
on
that
network "segment"
How
the
frame
from
A
⇒
H
is
forwarded
:
Switch 1
finds
H
in its
forwarding
table
and
forwards
the
frame
:
Switch 2
finds
H
in its
forwarding
table
and
forwards
the
frame
:
Improved network topology
Example newtork 2:
Changes
made to the
topology
:
The
switches
are
connected
directly
to each other:
There are
no
networks
in
between
the
switches
!!!
How
the
frame
from
A
⇒
H
is
forwarded
:
Result:
Only
nodes on the
source
network
and the
destination
network
will
hear
the
frame transmission
!!!
Switched networks
are
highly
scalable
!!!