1. Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 1 draft-sajassi-l2vpn-evpn-inter-subnet- switching-02.txt A. Sajassi (Cisco), S. Salam (Cisco), Y. Rekhter (Juniper), John Drake (Juniper), Wim Henderickx (ALU), Florin Balus (Nuage), Lucy Yong (Huawei), Linda Dunbar (Huawei) IETF 87, July 2013 Berlin

2. 2 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Changes from rev01  Rev01 covered only homogenous Scenarios where it was assumed IRB functionality is present at all PE devices  This rev of the draft expands the scenarios to heterogeneous environment where not all PE devices have IRB functionality because: 1.Some PE devices may not have the IRB capability 2.It is preferred to control policies centrally at the WAN-edge PE devices

3. 3 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Homogenous Scenarios Inter-Subnet Forwarding Among E-VPN NVEs within a DC

4. 4 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Homogenous Scenarios – Cont. 1.Connecting E-VPN sites within a DC 2.Connecting E-VPN sites in different DCs without route aggregation 3.Connecting E-VPN sites in different DCs with route aggregation 4.Connecting IP-VPN sites and E-VPN sites with route aggregation 5.Connecting IP-VPN sites and E-VPN sites without route aggregation

5. 5 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Heterogeneous Scenarios NVE1 GW NVE2 +-------------+ +-----------------+ +------------+ | … | |...... | |... | | (EVI) | |(EVI)-(VRF)| | (EVI) | | |..| | |.|..|. | | |..| | +-------------+ +-----------------+ +------------+ ^ v ^ v ^ v | | | | | | VM1->-+ +-->----------------------+ +-------------------------+ +------->-VM2 IRB functionality doesn’t exist in all PE devices

6. 6 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Next Steps  Solicit more inputs