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8030HEPTA/GPS GPS - NTP Time Server with 2x 10/100/1000 MBit LAN Interface - V04.00
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hopf
Elektronik GmbH
Nottebohmstr. 41
• D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
8.3.2.2.4
IPv6 Subnet Prefix Lengh
If no DHCP is used, the length of the network address must be entered here. If the length of
the network address is not known, it must be requested by the network administrator.
8.3.2.2.5
VLAN (Activation Key necessary)
A VLAN (Virtual Local Area Network) is a logical sub-network within a network switch or a
whole physical network. VLANs are used to separate the logical network infrastructure from
the physical wiring, thus to virtualize the Local Area Network. The technology of VLAN is
standardized by IEEE Standard 802.1q. Network applications like Time Server
8030HEPTA/GPS, implementing the standard IEEE 802.1q, are able to allocate individual net-
work interfaces to specific VLANs. To transfer data packets of several VLANs via a single
network interface the data packets are marked with a related VLAN ID. This method is called
VLAN-Tagging. The network application at the other end of the line (e.g. network switch, router
etc.) can allocate the data packet to the correct VLAN by checking the marking / tag.
