Cisco Cisco Email Security Appliance C160 用户指南
Appendix B Assigning Network and IP Addresses
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Cisco IronPort AsyncOS 7.1 for Email Configuration Guide
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You can connect two Ethernet interfaces to the same physical network, but you
must construct IP addresses and netmasks to allow the IronPort appliance to select
a unique delivery interface.
must construct IP addresses and netmasks to allow the IronPort appliance to select
a unique delivery interface.
IP Addresses, Interfaces, and Routing
When selecting an interface on which to perform a command or function in the
GUI or CLI that allows you to select an interface (for example, upgrading
AsyncOS, or configuring DNS, etc.), routing (your default gateway) will take
precedence over your selection.
GUI or CLI that allows you to select an interface (for example, upgrading
AsyncOS, or configuring DNS, etc.), routing (your default gateway) will take
precedence over your selection.
For example, suppose you have an IronPort appliance with the 3 network
interfaces configured, each on a different network segment (assume all /24):
interfaces configured, each on a different network segment (assume all /24):
And your Default gateway is 192.19.0.1.
Now, if you perform an AsyncOS upgrade (or other command or function that
allows you to select an interface) and you select the IP that is on data1
(192.19.1.100), you would expect all the TCP traffic to occur over the data1
ethernet interface. However, what happens is that the traffic will go out of the
interface that is set as your default gateway, in this case Management, but will be
stamped with the source address of the IP on data1.
allows you to select an interface) and you select the IP that is on data1
(192.19.1.100), you would expect all the TCP traffic to occur over the data1
ethernet interface. However, what happens is that the traffic will go out of the
interface that is set as your default gateway, in this case Management, but will be
stamped with the source address of the IP on data1.
Ethernet
IP
Management
192.19.0.100
data1
192.19.1.100
data2
192.19.2.100