GE Security Legend IP, Installation Manual

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Legend IP
Installation Manual
14
can expect many switches to turn on this feature by using a serial cable to configure the IP address of the built-
in management interface, then accessing that interface and using a web browser to change the settings.
Edge networks and network address translation
Centralized networks can be configured with periphery networks and a core network. An edge network is one
of the periphery networks that is located on the periphery of a centralized network and feeds data to the core
network, which is the single hub of the overall centralized network.
One issue that is becoming more prevalent with edge networks is the use of NAT (Network Address
Translation) to allow multiple network devices on a private, centralized network to share a single public IP
address. Routers, firewalls, and computers can be NAT-enabled to convert their private internal network IP
addresses to and from one or more public IP addresses for the Internet. Although NATs can increase network
security by keeping internal addresses hidden from the outside world, they should be used in conjunction with
appropriate firewalls to maintain that security.
Only use NAT devices that provide the ability to configure port forwarding . Port forwarding tells the NAT
device to forward incoming traffic from a specific port number on the public IP to a specified device on the
private internal network.
Table 6. GE qualified IP-compatible network switches
Model
D-Link
DES-3526 D-Link
DES-3550 D-Link
DGS-3024
Cisco
WS-C2960-
24TT-L Cisco
WS-C2960-
48TT-L Cisco
WS-2970G-
24T
Nortel
425-24T Nortel
425-48T
10/100 Mbps
ports 24 48 0 24 48 24 24 48
10/100/1000
Mbps ports 2 2 24 2 2 - 2 2
Internal
switching
capacity (Gbps) 8.8 13.6 48 - - - 16 16
IGMP snooping Yes Yes Yes - - - Yes Yes
Price level Entry-level Entry-level Entry-level Entry-level Entry-level Entry-level High-end High-end