Cisco Cisco Content Security Management Appliance M1070 Mode D'Emploi

This appendix describes general rules on networks and IP address assignments, and it presents some 
strategies for connecting the Cisco Content Security appliance to your network.

Topics included in this appendix include:

Cisco content security appliances have up to four Ethernet interfaces located on the rear panel of the 
system, depending on the configuration (whether or not you have the optional optical network interface). 
They are labeled:

Management

Data1

Data2

Data3

Data4

When you configure the network, the content security appliance must be able to select a unique interface 
to send an outgoing packet. This requirement drives some of the decisions regarding IP address and 
netmask selection for the Ethernet interfaces. The rule is that only one interface can be on a single 
network (as determined through the applications of netmasks to the IP addresses of the interfaces).

An IP address identifies a physical interface on any given network. A physical Ethernet interface can 
have more than one IP address for which it accepts packets. An Ethernet interface that has more than one 
IP address can send packets over that interface with any one of the IP addresses as the source address in 
the packet. This property is used in implementing Virtual Gateway technology.