Network Router User Manual

Appendix A: New Features Supported on Line Cards
362 SmartSwitch Router User Reference Manual
New Features that Require Specific Line Cards
T-series line cards, -AA revision line cards, and non -AA revision line cards can be used in
the same chassis. Version 3.0 and later firmware can detect the revision number of each
line card, and when configuring features that require -AA or T-series line cards, the
system checks to see if the line card revision matches.
This section explains how you can use line cards that support the feature and line cards
that do not support the feature in a single system. This document does not present
detailed command and configuration examples. Refer to the SSR User’s Manual and CLI
Reference Manual for more detail.
Network Address Translation
Network Address Translation (NAT) allows IP addresses to be translated between the
local (inside) interface and global (outside) interface. Ports that are assigned to the inside
and outside interfaces must reside on -AA or T-series hardware. This also applies to ports
that are assigned to an interface through a VLAN.
Diagram 1 shows a simple NAT example. Users on Network A appear to be on the same
subnet as Network W when traffic is going to the global Internet. There is no translation
between Network A and B or between Network B and W.
SSR-2-SX-AA
XX
SSR-2-LX-AA
XX
SSR-2-LX70-AA
XX
SSR-2-SER-AA
XX X
SSR-2-SERC-AA
XX X
SSR-2-SERCE-AA
XX X