20-4
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 20 Configuring L2 Virtual Private Networks
Prerequisites for L2VPN: AToM
Prerequisites for L2VPN: AToM
Before configuring L2VPN, ensure that the network is configured as follows:
• Configure IP routing in the core so that the PE routers can reach each other using IP.
• Configure the label distribution protocol to be Label Distribution Protocol (LDP).
• Configure label-switched paths (LSPs) between the PE routers. To enable dynamic MPLS labeling
on all paths between the imposition and disposition PE routers, use the mpls ip command.
• Configure a loopback interface for originating and terminating Layer 2 traffic. Make sure the
PE
routers can access the other router’s loopback interface. Note that the loopback interface is not
needed in all cases. For example, tunnel selection does not need a loopback interface when AToM
is directly mapped to a TE tunnel.
Note For L2VPN: LS, it is not necessary to configure:
—The label distribution protocol to be Label Distribution Protocol (LDP).
—Label-switched paths (LSPs) between the PE routers using the mpls ip command.
Supported Line Cards
Table 20-1 lists line cards supported by the Cisco 10000 series router.
Ta b l e 20-1 Cisco 10000 Series Line Cards that Support L2VPN
Transport Type Supported Line Cards
ATM AAL5 SDU support over MPLS 4-port OC-3/STM-1 ATM
8-port E3/DS3 ATM
1-port OC-12 ATM
Ethernet over MPLS:
VLAN mode
Port mode
8-port Fast Ethernet Half-Height
1-port Gigabit Ethernet Half-Height
1-port Gigabit Ethernet
SIP-600
SPA-1X10GE-L-V2 (10GE)
SPA-2X1GE-V2 (2 port GE)
SPA-5X1GE-V2 (5 port GE)
Frame Relay over MPLS:
DLCI-to-DLCI connections
Port-to-port connections
HDLC over MPLS
PPP over MPLS
24-port Channelized E1/T1
1-port Channelized OC-12/STM-4
4-port Channelized OC-3/STM-1
4-port Channelized T3
6-port Channelized T3
8-port Unchannelized E3/T3
6-port OC-3/STM1 Packet over SONET
1-port OC-12 Packet over SONET
1-port OC-48/STM-16 Packet over SONET
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