VXLAN, Enhancements, and Network Integration

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1 VXLAN, Enhancements, and Network Integration Apricot Malaysia Eddie Parra Principal Engineer, Juniper Networks Router Business Unit (RBU) Legal Disclaimer: This statement of product direc2on sets forth Juniper Networks current inten2on, and is subject to change at any 2me without no2ce. No purchases are con2ngent upon Juniper Networks delivering any feature or func2onality depicted on this statement Juniper Networks, Inc.

2 VARIOUS ENCAPSULATION METHODS VXLAN Overlays Cumulus, Arista,, Broadcom, Cisco, VMware, Citrix, Red Hat NVGRE Microsoft, Arista, HP, Broadcom, Juniper STT Nicira, Rackspace, ebay, Yahoo! Geneve VMware, Microsoft, Red Hat, Intel Fabrics TRILL Intel, Cisco, Brocade IEEE 802.1aq Huawei, ALU FabricPath Cisco VCS Brocade Qfabric Juniper Other GRE Ethernet-over-GRE IP-IP MPLS MPLS over GRE MPLS over UDP L2TP GTP-U etc 2 Copyright 2014 Juniper Networks, Inc.

3 VXLAN PLATFORM AND VENDOR SUPPORT Other T2 Platform Vendors Broadcom Trident 2 (aka T2 ) Platforms QFX S (1RU) 48x10 GbE 6x40 GbE QFX S (2RU) QFX Q 96x10 GbE 8x40 GbE 24x40 GbE 2 x Modules: 8x10 or 4x40 GbE Juniper MX-Series and EX Copyright 2014 Juniper Networks, Inc.

4 VXLAN ENCAPSULATION AND TERMINOLOGY VXLAN Encapsulation IP IP SA MAC DA MAC SA MAC DA MAC VXLAN IP/UDP SA MAC DA MAC IP SA MAC DA MAC Terminology VNI VXLAN VNI Host-A Router-A Router-B Host-B VXLAN Tunnel End Point () VXLAN Network Identifier (VNI) VXLAN Segment 4 Copyright 2014 Juniper Networks, Inc.

5 VIRTUAL EXTENSIBLE LOCAL AREA NETWORK (VXLAN) Encapsulation Overview Layer 2 Overlay scheme over Layer 3 network Designed for VM-to-VM communication in mind VXLAN should be transparent to end hosts Provide L2 segmentation ability > 4096 VLANs 24 bit VXLAN Network Identifier (VNI) 16M VXLAN segments Forwarding Overview Data-Plane based learning and forwarding VXLAN relies on Data-Plane learning of associated host MAC addresses to IP s through source learning Similar to Layer 2 with flood and learn Outer MAC DA Outer MAC SA Optional Outer 802.1Q Outer IP DA Outer IP SA Outer UDP VXLAN ID (24 Bits) Inner MAC DA Inner MAC SA Optional Inner 802.1Q Original Ethernet Payload FCS VXLAN Encapsulation Original Ethernet Frame 5 Copyright 2014 Juniper Networks, Inc.

6 VXLAN: BROADCAST TRAFFIC EXPLAINED 1) Host-A sends an ARP for Host-B. 2) Router-A looks up the VNI association for Host-B. 3) There is no entry and the ARP is VXLAN encapsulated and sent out to the IP multicast group per that VNI. 4) Router-B receives the Multicast packet, verifies the validity of the VNI, and learns the inner source MAC of Host-A. 5) Host-B receives the ARP and responds. 6) Router-B looks up the VNI associated for Host-A, and VXLAN unicasts to Router-A. 7) Router-A receives the unicast packet, verifies the validity of the VNI, and learns the inner source MAC of Host-B. Multicast Enabled VXLAN Host-A Router-A Router-B Host-B 6 Copyright 2014 Juniper Networks, Inc.

7 VXLAN INTEGRATION WITH EXISTING SERVICES Overview Terminate (aka Stitch ) VXLAN segments into existing network services, such as L3VPN, VPLS and E-VPN Use routing/switch instances as centralized anchor points within a geography Integration Areas Data Center Interconnect (DCI) Virtual Provide Cloud Gateway Access to Edge MBH, Business, Residential, Wholesale Subtending nodes L3VPN VPLS EVPN IRB.0 LAN Bridge-Domain.0 VLAN-ID: 100 LAN IRB.1 Virtual-Switch.0 VLAN-ID: 101 VNI 100 LAN LAN VNI Copyright 2014 Juniper Networks, Inc.

8 INTER-VXLAN ROUTING Bridge-Domain or Virtual-Switch VXLAN, VNI # 100 Router-B Router-A IRB VXLAN, VNI # 200 Router-C Use Cases: Inter-Connecting VXLAN Segments L2 - VLANS L3 IRB L2VPN / L3VPN VPLS / E-VPN Augment Merchant Silicon with In-House Silicon Example: Trident-2 does not support the ability to route packets into VXLAN tunnels and vice versa based on payload IP header. Controlled Broadcast Replication 8 Copyright 2014 Juniper Networks, Inc.

9 BROADCAST DOMAIN REPRESENTATION Layer-3 VXLAN VNI 100 VNI 200 IRB L2 Broadcast Domain NH E-VPN VLAN 9 Copyright 2014 Juniper Networks, Inc.

10 UNICAST ONLY VXLAN Router-A No Multicast VXLAN, VNI # 100 VXLAN, VNI # 200 Router-B Router-C Enhancements: Broadcast replication using VXLAN Unicast Endpoints are statically defined In-line Data Plane learning and forwarding functions the same Use Cases: No IP Multicast support between s A static point-to-point deployment, whereby a given VNI only has two s VXLAN communication must be secure using a mechanism that does not support IP Multicast 10 Copyright 2014 Juniper Networks, Inc.

11 CONTROL MODES Data Plane Based Control Plane Based Controller VDS VDS VM VM VM VM VM VM VM VM VXLAN IETF Draft based Multicast for L2-BUM traffic Or Unicast BUM replication P2P tunnels built by the controller Juniper Contrail or VMware NSX OVSBD (or NETCONF) Controller MAC Learning Can be combined with Data Plane Control 11 Copyright 2014 Juniper Networks, Inc.

12 DAYONE GUIDE: VXLAN CASE STUDIES Day One Guide Native VXLAN with Multicast PIM/OSPFv2 Unicast Only VXLAN No Multicast Inter-VXLAN Routing Network Service Integration VXLAN over IPSec Transport IPsec Tunnel Mode Tentatively Scheduled for May, Copyright 2014 Juniper Networks, Inc.

13 SUMMARY VXLAN Consideration Think beyond VXLAN s design use cases Use platform diversity to your advantage Economics, Power, Space, etc JUNOS VXLAN Support Target Release: JUNOS 14.1 May timeframe Account teams can provide beta images Feel free to me accordingly 13 Copyright 2014 Juniper Networks, Inc.

14 THANK YOU 2010 Juniper Networks, Inc.

15 BACKUP SLIDES 2010 Juniper Networks, Inc.

16 REFERENCES Standards VXLAN: A Framework for Overlay Virtualized L2 Networks over L3 Networks Generic Overlay OAM and Datapath Failure Detection The Open vswitch Database (OVSDB) Management Protocol 16 Copyright 2014 Juniper Networks, Inc.

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