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Chapter 13
MPLS/VPN Support
VPN configuration requirements
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•
Backwards Compatibility
An SCE platform running SCOS V3.1.5 and up does not support MPLS/VPN subscribers of the type
used in older versions. Instead of defining an MPLS/VPN subscriber, which reflects the whole VPN, the
user must configure a VPN entity and a full range private IP subscriber within that VPN
(0.0.0.0/0@VPN1)
When working with the combination of SM of a version before V3.1.5LA and an SCE with V3.1.5 and
up, only regular IP subscribers are supported. VPN-based subscribers are not supported at all in this
combination.
Configuring MPLS/VPN Support
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Configuring the MPLS Environment
In order for MPLS/VPN support to function, the environment must be configured correctly, specifically
the following are required:
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How to Check the Running Configuration
Check the running configuration to verify no user-configured values appear for tunneling protocols or
VLAN support, indicating that they are all in default mode.
Step 1
From the SCE# prompt, type
Displays the running configuration.
Check that no VLAN or L2TP configuration appears.
Step 2
OL-7827-12
Two VPN sites must be aggregated into one VPN if the following conditions are both true:
They are both connected to the same SCE platform
–
They both communicate with a common remote site using the same upstream labels and P
–
router.
An MPLS/VPN-based subscriber MAY NOT have IP mappings over more than one VPN.
Configuring the MPLS Environment, page 13-11
Configuring the SCE Platform for MPLS/VPN Support, page 13-12
Configuring the SM for MPLS/VPN Support, page 13-16
All other tunneling protocols should be configured to the default mode.
The MPLS auto-learning mechanism must be enabled.
show running-config
and press Enter.
Cisco SCE 2000 and SCE 1000 Software Configuration Guide
Configuring MPLS/VPN Support
13-11
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