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Configuring Layer 2 VPNs
About Layer 2 VPNs
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/0513-3
If you set the Net Overflow parameter to shared, a private network can also use public
trunks as a backup. This is called inclusive mode (shown in Figure 13-2). The
identifier, VPN 0, is reserved to indicate the public part of the network. Trunks that
have non-zero VPNs are reserved for data traffic matching that VPN, although they
can also carry management traffic for the entire network.
Figure 13-2. Layer 2 VPN Inclusive Mode Example
Action
Action
Customer A
Customer B
Customer A
Customer B
Customer D
Customer D
Customer C
Customer C
Customer B
Customer A
Create VPN-D and associate Customer D.
Configure PVC for VPN-D and Private Net Overflow to Public.
Under normal conditions, PVC will use trunk(s) assigned to VPN-D.
During overflow or trunk failure, PVC will use public trunks.
V
P
N
-
D
Public
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