Cisco 10000-2P2-2DC Software Guide - Page 452
Ethernet to VLAN over LS-Bridged: Example, Routed Interworking
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Routed Interworking Chapter 21 Configuring L2VPN Interworking Ethernet to VLAN over LS-Bridged: Example PE config t interface atm 2/0/0 pvc 0/200 l2transport encapsulation aal5snap interface gigabitethernet 5/1/0 no ip address connect ETH-VLAN gigabitethernet 5/0/0 gigabitethernet 5/1/0.3 interworking ethernet Ethernet to VLAN over AToM-Bridged: Example PE1 ip cef ! mpls label protocol ldp mpls ldp router-id Loopback0 force ! pseudowire-class atom encapsulation mpls ! interface Loopback0 ip address 10.9.9.9 255.255.255.255 ! interface FastEthernet0/0 no ip address ! interface FastEthernet1/0 xconnect 10.9.9.9 123 pw-class atom PE2 ip cef ! mpls label protocol ldp mpls ldp router-id Loopback0 force ! pseudowire-class atom-eth-iw encapsulation mpls interworking ethernet ! interface Loopback0 ip address 10.8.8.8 255.255.255.255 ! interface FastEthernet1/0.1 encapsulation dot1q 100 xconnect 10.9.9.9 123 pw-class atom-eth-iw Routed Interworking Routed interworking is used to carry Layer 3 packets. Each protocol type has a different routed interworking function. The most common routed interworking function is support for Internet Protocol (IP). Therefore, this type of interworking function is also called IP Interworking, and a new type of pseudowire, IP over MPLS, is used. In routed interworking, IP packets that are extracted from the attachment circuits are sent over the pseudowire. The pseudowire works in the IP Layer 2 transport (VC type 0x000B) like-to-like mode. The interworking function at NSP performs the required adaptation based on the attachment circuit technology. Non-IPv4 packets are dropped. In routed interworking, the following considerations are to be kept in mind: • Address resolution packets (ARP), inverse ARP, and IPCP are punted to routing protocol. Therefore, NSP at the PE router must provide the following functionality for address resolution: - Ethernet-PE device acts as a proxy-ARP server to all ARP requests from the CE router. The PE router responds with MAC address of its local interface. 21-4 Cisco 10000 Series Router Software Configuration Guide OL-2226-23
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