Cisco Cisco Email Security Appliance C160 Mode D'Emploi
Chapter 7 Advanced Network Configuration
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Cisco IronPort AsyncOS 7.5 for Email Advanced Configuration Guide
OL-25137-01
VLANs and Physical Ports
A physical port does not need an IP address configured in order to be in a VLAN.
The physical port on which a VLAN is created can have an IP that will receive
non-VLAN traffic, so you can have both VLAN and non-VLAN traffic on the
same interface.
The physical port on which a VLAN is created can have an IP that will receive
non-VLAN traffic, so you can have both VLAN and non-VLAN traffic on the
same interface.
VLANs can be created on all “Data” and “Management” ports, including fiber
optic data ports available on some IronPort X10x, C3x, and C6x appliances.
optic data ports available on some IronPort X10x, C3x, and C6x appliances.
VLANs can be used with NIC pairing (available on paired NICs) and with Direct
Server Return (DSR).
Server Return (DSR).
illustrates a use case showing how two mail servers unable to
communicate directly due to VLAN limitations can send mail through the
IronPort appliance. The blue line shows mail coming from the sales network
(VLAN1) to the appliance. The appliance will process the mail as normal and
then, upon delivery, tag the packets with the destination VLAN information (red
line).
IronPort appliance. The blue line shows mail coming from the sales network
(VLAN1) to the appliance. The appliance will process the mail as normal and
then, upon delivery, tag the packets with the destination VLAN information (red
line).