Chapter 1 Getting to Know Your Switch

1.1.3 IEEE 802.1Q VLAN Application Example

A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into multiple logical networks. Stations on a logical network belong to one or more groups. With VLAN, a station cannot directly talk to or hear from stations that are not in the same group(s) unless such traffic first goes through a router.

For more information on VLANs, refer to Chapter 8 on page 58.

1.1.3.1 Tag-based VLAN Example

Ports in the same VLAN group share the same frame broadcast domain, thus increasing network performance by reducing broadcast traffic. VLAN groups can be modified at any time by adding, moving or changing ports without any re-cabling.

Shared resources such as a server can be used by all ports in the same VLAN as the server. In the following figure only ports that need access to the server need to be part of VLAN 1. Ports can belong to other VLAN groups too.

Figure 3 Shared Server Using VLAN Example

1.1.4 IPv6 Support

IPv6 (Internet Protocol version 6), is designed to enhance IP address size and features. The increase in IPv6 address size to 128 bits (from the 32-bit IPv4 address) allows up to 3.4 x 1038 IP addresses. At the time of writing, the Switch supports the following features.

•Static address assignment and stateless auto-configuration

•Neighbor Discovery Protocol (a protocol used to discover other IPv6 devices in a network)

•Remote Management using PING, SNMP, HTTP and TFTP services

•ICMPv6 to report errors encountered in packet processing and perform diagnostic functions, such as "PING”

•IPv4/IPv6 dual stack; the Switch can run IPv4 and IPv6 at the same time

•DHCPv6 client

•Multicast Listener Discovery (MLD) snooping

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GS1900 Series User’s Guide