User Documentation

Planning

2053260000/05/2015

MAC address

• World-wide unique, non-interchangeable serial number for all Ethernet

components

• Stored permanently on the network card

• Is comprised of a 48-bit long sequence, which is normally represented as six

hexadecimal numbers, separated by hyphens (-)

Divided into:

• 3-byte vendor ID and

• 3-byte device ID (consecutive number)

Example: 00-15-7E-01-00-2F-vendor ID Weidmüller: 00:15:7E

Subnet mask

The subnet mask is used to demarcate a related address area of IP addresses.

This option can be used to subdivide a large company network in numerous

subnetworks and, for example, into company sectors.

A subnet mask consists of 32 bits and is always used in conjunction with the IP

address. It has the same length as an IP address.

The subnet mask consists of the network part and the host part. The number of

the "1-bits" from left indicate the network part. The zeros indicate the network

part.

255.0.0.0(/8) 11111111 00000000 00000000 00000000

255.255.0.0(/16) 11111111 11111111 00000000 00000000

255.255.240.0(/20) 11111111 11111111 11110000 00000000

255.255.255.0(/24) 11111111 11111111 11111111 00000000

255255255240(/28) 11111111 11111111 11111111 11110000

Main task:

• To separate the network part of the IP address from the host part

• Is critical for communication via an IP network

Example: 255.255.255.0