Figure 17: Typical Layer 2 Vpn Network Topology; Figure 18: Consolidated Layer 2 Vpn Network Topology; Table 22: Chassis Parameters - Juniper JUNOS OS 10.4 - PROTECTED SYSTEM DOMAIN Configuration Manual

JUNOS 10.4 Protected System Domain Configuration Guide
Configuration
178
Figure 17 on page 178 illustrates a typical Layer 2 VPN topology, with T640 routers as P
routers, M320 routers as PE routers, and MX Series Ethernet Services routers as CE routers.
The service provider uses a separate PE router for each customer.

Figure 17: Typical Layer 2 VPN Network Topology

L2VPN
CE
MX Series
router
POS/T3
PE
M320
I-BGP mesh
router
P
I-BGP mesh
T640
router
By replacing the two M320 routers with the JCS1200 chassis interconnected with the
T640 router, the service provider simplifies and consolidates the network at the provider
edge. One platform supports both customer networks through the creation of PSDs, as
shown in Figure 18 on page 178.

Figure 18: Consolidated Layer 2 VPN Network Topology

Table 22 on page 178 provides the chassis parameters required for the JCS1200 platform
and the T640 router for each PSD.

Table 22: Chassis Parameters

PSD JCS1200 Platform
PSD1 Routing Engine in slot 4
L2VPN
CE
MX Series
router
POS/T3
PE
M320
router
P
T640
router
MPLS core
T640 Routing Node
FPC in slot 4 (with PICs supporting
Fast Ethernet and SONET interfaces)
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