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20 Installing SG203 and SG208 Security Gateway March 2004
Avaya SG203/SG208 Security Gateway Hardware Installation Guide
Multi-interface ports
Four ports are available on the security gateway, public, private and two
other interface ports that are not designated.
The public port provides an interface to the public Internet network, while
the private port provides an interface to the private local network. The
other two could be used for public-backup, semi-private, DMZ, or
management interface zones.
The SG203 requires a crossover cable when connecting to a router and
uses a straight-through cable when connecting to a hub or switch. The
SG208 can use any type of cable (crossover or straight-through) when
connecting to a hub, switch, or router.
NOTE: To realize maximum performance when operating at the 1000
Base-T rate, it is necessary to use CAT5e cables, shipped with the
device. Standard CAT5 cables are not rated for full Gigabit data rates.
Connecting the SG203/SG208 security gateway to the
network
The supplied Cat5e cables are used to connect the security gateway to
the public network and the private LAN. Figure 6 shows a typical network
using the SG203 and SG208 security gateway.