A-7
CrossPoint 450 Plus and MAV Plus Switchers
•
Ethernet Connection
Determining whether devices are on the same subnet
To determine the subnet, the local device’s IP address is compared to the remote
device’s IP address (figure A-6). Each address’s octets are compared or not
compared
, depending on the value in the related subnet mask octet.
•
If a subnet mask octet contains the value 255, the related octets of the local
device’s address and the remote device’s IP address are unmasked.
Unmasked octets are compared
(indicated by ? in figure A-6).
•
If the subnet mask octet contains the value 0, the related octets of the local
device’s and remote device’s IP addresses are masked.
Masked octets are not compared
(indicated by X in figure A-6).
If the unmasked octets of the two IP addresses match (indicated by = in figure A-6)
(example 1), the two addresses are on the same subnet.
If the two unmasked fields do not match (indicated by
≠≠≠≠≠
in figure A-6) (example 2
and example 3), the addresses are not on the same subnet.
192.168.254.254
255.255.0.0 (
?
.
?
.
X
.
X)
192.168.2.25
=.=.
X
.
X
—
Match
(Same subnet)
(Different subnet)
(Different subnet)
Local IP Address:
Subnet Mask:
Remote IP Address:
Match?:
Example 1
Example 2
192.168.254.254
255.255.0.0 (
?
.
?
.
X
.
X)
190.190.2.25
≠
.
≠
.
X
.
X
—
No match
Example 3
192.168.254.254
255.255.0.0 (
?
.
?
.
X
.
X)
192.190.2.25
=
.
≠
.
X
.
X
—
No match
Figure A-6
—
Comparing the IP addresses
im Vertrieb von
CAMBOARD Electronics
www.camboard.de
Tel. 07131 911201
Fax 07131 911203
