Configuration Of Mpls L2Vpn In Ccc Mode - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide
Martini mode is more applicable to a low-density L2 connection, for example, star
connection.
IV. MPLS L2VPN in Kompella mode
MPLS L2VPN in Kompella mode is similar to the L3 BGP/MPLS VPN. Like BGP/MPLS
VPN, the PE uses IBGP session to detect the nodes in L2VPN and transmit VPN
information. In terms of label distribution, MPLS L2VPN in Kompella mode makes use
of label block to assign labels for multiple connections at a time. The user can specify a
local CE range to indicate the number of CEs to which the current CE can be connected.
The system will assign a label block equivalent to CE range for the CE at a time. This
approach allows the user to reserve some extra labels for VPNs for future use. While
causing the waste of label resources, an enormous benefit of this undertaking is the
reduced configuration works performed in VPN deployment and expansion. Once the
size of the label blocks is determined, the system can calculate labels required in each
link with a specific algorithm and forward packets with MPLS LSP. MPLS L2VPN also
(in the same way as BGP/MPLS VPN) differentiates VPNs with VPN-target, which
enable flexible VPN networking.
Unlike MPLS L2VPN in Martini mode, the Kompella mode does not operate directly on
CE-CE connections, but partitions different VPNs in the SP network and then numbers
the CEs in every VPN. For establishing a connection between two CEs, you only need
to specify the IDs for local and remote CEs, as well as the circuit ID (for example,
VPI/VCI of ATM) allocated by the local CE for the target connection.
Note:
The configuration of CE is relatively simple and only the interface involved is configured,
so only PE configuration is detailed here.
If you have configured both L2VPN and L3VPN services, L3VPN service must comply
with L2VPN service. If you remove L2VPN service, you can go on using L3VPN
service.

4.2 Configuration of MPLS L2VPN in CCC Mode

Perform the following tasks to configure CCC on a PE:
Configure interface
Enable MPLS
Configure static LSP
Enable MPLS L2VPN
Enable CCC on an interface
Create CCC connection
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Chapter 4 MPLS L2VPN Configuration