Extron electronics MAV Plus Series - Determining Whether Devices Are on the same Subnet

A-7
CrossPoint / MAV Matrix 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(gure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gure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gureA-6).
IftheunmaskedoctetsofthetwoIPaddressesmatch (indicated by =ingureA-6)
(example 1), the two addresses are on the same subnet.
Ifthetwounmaskedeldsdo not match (indicated by ≠ingure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