Comtech EF Data CDM-760 - Manual (Page 128)

Front Panel Operation Revision 2
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
6–42
6.2.2.8 CONFIG: IP
IP Config:
Addresses SNMP ()
Use the   arrow keys to select a parameter. Press ENTER.
6.2.2.8.1 (CONFIG: IP) Addresses
IP:192.168.001.001/24 MAC:0006B00286F5
Gateway:192.001.001.100 ()
Use the   arrow keys to select a parameter. Press ENTER.
CAUTION – Carefully review the following information:
1) Depending on the IP Address mask (“/24” in this example) certain IP addresses are
reserved for Network Address and Broadcast Addresses. These addresses are the lowest
and highest IP addresses allowable in the mask, and are not allowed to be used as the
modem’s IP address. In this case, the Network Address is 192.168.1.0 and the Broadcast
Address is 192.168.1.255. Entry of a Network or Broadcast Address will be rejected by the
modem.
2) The following IP addresses may NOT be entered as the modem’s IP Address, because
they are used internally, they violate common networking practice, and they will cause
network issues:
IP Address/Range Reason this IP Address cannot be used
0.0.0.0 Non-routable address per RFC 1122
127.0.0.0 – 127.255.255.255 127.X.X.X reserved for loopback addresses
169.245.0.X Internal IP Subnet used by modem
169.245.1.X Internal IP Subnet used by modem
224.0.0.0 – 239. 255.255.255 Multicast IP Address range
240.0.0.0 – 255. 255.255.255 Experimental IP Address range
All others Cannot be the lowest or highest address allowable in the subnet mask
unless the mask is /32
3) The following rules apply to the subnet mask and must be held to as they violate common
networking practice and will cause network issues:
IP Address/Range Mask / Subnet Range
128.X.X.X – 191.X.X.X Classful network: Subnet Make must be ≥16 bits
192.X.X.X – 223.X.X.X Classful network: Subnet Make must be ≥24 bits
All others Subnet Mask must be 8-30 bits or 32