Extron Electronics Ultra Series Manual

A SERVICE OF

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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