ZyXEL Communications NSA-220 ユーザーズマニュアル
NSA-220 User’s Guide
85
C
H A P T E R
7
Network Screen
This chapter discusses the network configuration screen.
7.1 Network Settings
Use the network configuration screen to assign the NSA a dynamic or static IP address and
DNS information.
DNS information.
7.1.1 IP Address
The NSA needs an IP address to communicate with the media servers on your network. The
NSA can get an IP address automatically if you have a device on your network that gives them
out. Or you can assign the NSA a static (fixed) IP address.
NSA can get an IP address automatically if you have a device on your network that gives them
out. Or you can assign the NSA a static (fixed) IP address.
7.1.2 DNS Server Address
A DNS (Domain Name System) server maps domain names (like www.zyxel.com) to their
corresponding IP addresses (204.217.0.2 in the case of www.zyxel.com). This lets you use
domain names to access web sites without having to know their IP addresses. The NSA can
receive the IP address of a DNS server automatically (along with the NSA’s own IP address).
You can also manually enter a DNS server IP address in the NSA.
corresponding IP addresses (204.217.0.2 in the case of www.zyxel.com). This lets you use
domain names to access web sites without having to know their IP addresses. The NSA can
receive the IP address of a DNS server automatically (along with the NSA’s own IP address).
You can also manually enter a DNS server IP address in the NSA.
7.1.3 Jumbo Frames
Jumbo frames are Ethernet frames larger than 1500 bytes. They enable data transfer with less
overhead. The bigger the frame, the better the network performance.
overhead. The bigger the frame, the better the network performance.
To use jumbo frames, your LAN must support 1 Gbps transmissions (Gigabit Ethernet). All of
your network devices (computer Ethernet cards and switches, hubs, or routers) must also
support the same size of jumbo frames that you specify in the NSA.
your network devices (computer Ethernet cards and switches, hubs, or routers) must also
support the same size of jumbo frames that you specify in the NSA.
"
If you enable jumbo frames on the NSA in a network that does not support
them, you will lose access to the NSA. If this occurs, you will have to restore
the factory default configuration. Push the RESET button on the NSA’s rear
panel and release it after you hear a beep.
them, you will lose access to the NSA. If this occurs, you will have to restore
the factory default configuration. Push the RESET button on the NSA’s rear
panel and release it after you hear a beep.