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A virtual local area network (VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2). In this context, virtual, refers to a physical object recreated and altered by additional logic, within the local area network. VLANs work by applying tags to network frames and handling these tags in networking systems – creating the appearance and functionality of network traffic that is physically on a single network but acts as if it is split between separate networks. In this way, VLANs can keep network applications separate despite being connected to the same physical network, and without requiring multiple sets of cabling and networking devices to be deployed. VLANs allow network administrators to group hosts together even if the hosts are not directly connected to the same network switch. Because VLAN membership can be configured through software, this can greatly simplify network design and deployment. Without VLANs, groupin

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Virtual Trunk Simulation

One of the activities of the ACTS project EXPERT is to perform trials demonstrating the use of advanced Resource Management and Routing (RM&R) algorithms in ATM networks. The RM&R model chosen for these trials is based on the Virtual Trunk (VT) concept. In ATM networks, a VT is a virtual path connection setup by the network for reducing connection awareness at the transit nodes. A virtual trunk is considered as a connection by the network supporting it (the VP network) and as a logical trunk by the connections supported. In this context, VTs are considered to be VBR connections. In order to adapt the VT level to the changes in traffic, we use dynamic virtual trunks. In this paper, we compare the VBR-over-VBR approach to a more traditional VBR-over-CBR approach. The comparison is based on the simulations performed in the EXPERT project by WP3.2. In addition, a dynamic VP bandwidth allocation method is demonstrated by simulations.

1997

Realizing the Benefits of Virtual LANs by Using IPv6

Jean-Yves Le Boudec

The benefits that Virtual LANs offer can be realized by using features of an IPv6 network along with small enhancements the IPv6 and DHCPv6 protocol stacks.

1998

Realizing the Benefits of Virtual LANs by Using IPv6

Jean-Yves Le Boudec

The benefits which virtual LANs are offering can be realized by using features of an IPv6 network along with small enhancements to the IPv6 and DHCPv6 protocol stacks.

1997