User guide

4-10 ExtremeWare EPICenter Software Installation and User Guide
Using the Inventory Manager
Examples:
— As an IP address Range (such as 10.203.10.20 to 10.203.10.45)
There are certain IP addresses that are reserved. You should not include these
addresses in your discovery.
• Class A networks: 0 and 127 are reserved.
• Class D networks: 224 - 239 are reserved for multicasting.
• All addresses above 239 are reserved.
• 255 is reserved for broadcast datagrams for either the host or network
portion of the IP address.
In addition, certain host addresses may be interpreted as broadcast
addresses, depending on the subnetting of your network.
IP addresses are processed prior to starting the discovery, and IP addresses
that contain 255's in the host portion are eliminated. This is based on the IP
address as well as the subnet mask.
4 Specify (or verify) the Subnet Masksize as appropriate. The value in the Subnet Mask
field is the number of bits to be masked, starting from the high-order (left-hand) octet.
The default subnet mask of 24 will mask the three high-order octets.
5 Specify(orverify) the SNMP Read Community stringso that EPICenter will be able to
retrieve informationfrom any devicesit discovers.
6 Click the New button toadd the rangeinto the Device Discovery Criteria list.
7 Repeat steps 3 through 6 to specify any additional device addresses or ranges forthe
discovery.
IP Address Specification Addresses Generated
10.203.0.* polls 10.203.0.0 through 10.203.0.255
10.203.?.?? polls 10.203.0.0 through 10.203.9.99
0.203.0.1? or 10.203.0.10-19 both specify the same range: 10.203.0.10 through
10.203.0.19
10.203.0-2.10-30 polls
10.203.0.10 through 10.203.0.30
10.203.1.10 through 10.203.1.30
10.203.2.10 through 10.203.2.30