Cisco Catalyst 3750 - Default VLAN Mapping Configuration; Mapping Customer Vlans to Service-Provider Vlans

13-8
Catalyst 3750 Metro Switch Software Configuration Guide
78-15870-01
Chapter 13 Configuring IEEE 802.1Q and Layer 2 Protocol Tunneling
Configuring VLAN Mapping
This section includes this configuration information:
• Default VLAN Mapping Configuration, page 13-8
• Mapping Customer VLANs to Service-Provider VLANs, page 13-8
• Mapping Customer 802.1Q Traffic with VLAN IDs, page 13-9
Default VLAN Mapping Configuration
By default, no VLAN mapping is configured.
Mapping Customer VLANs to Service-Provider VLANs
Figure 13-4 shows a topology where a customer uses the same VLANs in multiple sites at different sides
of a service-provider network. You map the customer VLAN IDs to service-provider VLAN IDs for
packet travel across the service-provider backbone. The customer VLAN IDs are retrieved at the other
side of the service-provider backbone for use in the other customer site. Configure the same set of VLAN
mappings at an ES on each side of the service-provider network. See the example following the
configuration steps.
Figure 13-4 Example of VLAN Mapping
Service provider
Catalyst
6500
Customer A
VLANs 1-5
Host
Host
Customer A
VLANs 1-5
Customer A
VLANs 1-5
Customer
switches
Customer
switch
Access, ISL,
or 802.1Q trunk
VLAN mapping at
enhanced services ports
Access, ISL,
or 802.1Q trunk
Catalyst 3750
Metro switch A
Catalyst 3750
Metro switch B
Catalyst 3750
Metro switch A
Catalyst 3750
Metro switch B
101101