![BelAir Networks BelAir 100SN Скачать руководство пользователя страница 150](http://html.mh-extra.com/html/belair-networks/belair-100sn/belair-100sn_user-manual_2725293150.webp)
BelAir100SN User Guide
Using Layer 2 Tunnels
May 31, 2010
Confidential
Document Number BDTM11001-A01 Released
Using Layer 2 Tunnels
Layer 2 tunnels use the Layer 2 Tunneling Protocol (L2TP), version 2, to provide
the following benefits:
• provide a bi-directional communication path between the BelAir100SN and
a central router. The path is unaffected by the size, topology and complexity
of the Layer 2 and Layer 3 access network between them.
• ensure efficient handling of mobile client MAC addresses, especially for
customers using DOCSIS technology in their access network
shows how wireless mobility is implemented with L2TP. When a
wireless client transmits an 802.11 frame, the BelAir Access Point (AP)
converts it to an Ethernet frame with VLAN information, encapsulates it within
an IP packet and then sends the packet to a Tunnel End Point (TEP). The TEP is
usually part of a network central router. The BelAir implementation of Layer 2
tunnels currently operates with a Cisco 7200 router or equivalent, and with a
RedBack SmartEdge router or equivalent.
Figure 8: Wireless Mobility using L2TP
BelAir Access Points (APs)
Mobile wireless client
device going from
one AP to another
BelAir Access Points (APs)