570NAT-HW-X19
High Density Network Address Translator
Revision 1.0
Page - 23
4.4. VLAN BASED NAT
The VLAN Mode allows VLAN-tagged datagrams from the LAN side to enter a WAN after multicast
encapsulation, similar to the Tunnelling NAT mode. In this mode, however, flows are based on VLAN
Tags, rather than unicasts/multicasts alone. Up to 256 unique flows can be configured per processing
core, with independent encapsulation headers.
Figure 4-8 : VLAN Based NAT Mode Block Diagram
Each VLAN flow must have a unique Tag value. Two or more flows cannot share the
same VLAN Tag because there is no ‘
Packet Replication’
in VLAN Mode.
VLAN Mode does not support nested VLAN Tags. The 570NAT-HW-X19 only
supports Ether Type=0x8100 traffic.