3Com S7902E, Руководство по настройке

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VPLS Configuration
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To support VPLS functions, configure your S7900E series Ethernet switch with EB or SD LPUs and
no card intermixing is allowd.
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The S7900E Series Ethernet Switches are distributed devices supporting Intelligent Resilient
Framework (IRF). Two S7900E series can be connected together to form a distributed IRF device.
If an S7900E series is not in any IRF, it operates as a distributed device; if the S7900E series is in
an IRF, it operates as a distributed IRF device. For introduction of IRF, refer to IRF Configuration in
the System Volume .
When configuring VPLS, go to these sections for information you are interested in:
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VPLS Overview
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VPLS Configuration Task List
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Displaying and Maintaining VPLS
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VPLS Configuration Examples
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Troubleshooting VPLS
VPLS Overview
Virtual Private LAN Service (VPLS), also called Transparent LAN Service (TLS) or virtual private
switched network service, can deliver a point-to-multipoint L2VPN service over public networks. With
VPLS, geographically-dispersed sites can interconnect and communicate over MAN or WAN as if they
were on the same LAN.
VPLS provides Layer 2 VPN services. However, it supports multipoint services, rather than the
point-to-point services that traditional VPN supports. With VPLS, service providers can create on the
PEs a series of virtual switches for customers, allowing customers to build their LANs across the
Metropolitan Area Network (MAN) or Wide Area Network (WAN).
Operation of VPLS
Basic VPLS concepts
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CE
Customer edge device that is directly connected with the service provider network.
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PE
Provider edge device that connects one or more CEs to the service provider network. A PE maps and
forwards packets between private networks and public network tunnels. A PE can be a UPE or NPE.