L2Pt - Zte ZXR10 5900E Product Description

A CE with MVCE features actually simulates multiple CE. Each virtual CE is separated
from each other and is able to be accessed to multiple VPN users. PE won't perceive
whether it is multiple CE or one MVCE. Thus PE doesn't need any expansion.
If dynamic routing protocol is run between MVCE and PE, the routing protocol needs to
support multiple instances. PE and MVCE exchange routing information via standard
EBGP, OSPF, RIP or static route.
Static route and RIP are both standard protocols. But each VRF runs different instances
without interference to each other. If static route is configured, it will be ok if it supports
VRF.

3.2.30 L2PT

In QinQ VPN mode, if VPN uses locating at different places want to initiate their L2
protocol for example, STP, LACP, ZDP, they need to use core network to transfer these
L2 protocol messages transparently, and these messages with preserved MAC address
for bridge can not process transparent transmission normally. L2PT Layer 2 Protocol
Tunnel) solves this problem, so it is widely used to transfer user network L2 protocol
message in QinQ VPN.
L2PT networking is as shown in the following figure.

Edge Switches:It locating at the edge of operator network connects customer
network equipment.

Layer 2 protocol transportation port: On port of Edge Switch. The encapsulation of
decapsulated L2 protocol message.

Transportation PDU: Encapsulated protocol message, for example ZDP, STP and
LACP, etc.
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ZXR10 5900E Product Description
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