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nvo3 WG IETF-88

DHCP Options for Configuring Multicast Addresses in VXLAN draft-sarikaya-dhc-vxlan-multicast-02 Behcet Sarikaya Frank Xia November 2013. nvo3 WG IETF-88. Problem 1: multi-tenancy requires independent address spaces. VXLAN provides overlayed virtual networks for each tenant.

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nvo3 WG IETF-88

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  1. DHCP Options for Configuring Multicast Addresses in VXLANdraft-sarikaya-dhc-vxlan-multicast-02 Behcet SarikayaFrank XiaNovember 2013 nvo3 WGIETF-88

  2. Problem 1: multi-tenancy requires independent address spaces • VXLAN provides overlayed virtual networks for each tenant. • Normally, a VM configures its IP address through DHCPv4/DHCPv6 • It is possible for a VM to be configured the same IPv4/IPv6 address as another VM belonging to a different tenant.

  3. Problem 2: Rendezvous Point (RP) address is needed for a VTEP to send IPv4/IPv6 multicast packets • VXLAN uses IPv4/IPv6 multicast mechanism to convey Ethernet MAC broadcast/multicast traffic. • When a VTEP intercepts an ARP with broadcast destination MAC address, the VTEP needs to send the packet to a router or switch acting as IP multicast Rendezvous Point • The VTEP needs to know the IP address of Rendezvous Point

  4. Problem 3: A VTEP needs to join some IPv4/IPv6 multicast groups • In order to receive IPv4/IPv6 multicast packets, a VTEP needs to join a multicast group for each VNI (VXLAN Network Identifier) • A VTEP needs to knowIP multicast address for each VNI

  5. Solution 1: VNI DHCP/DHCPv6 option for multi-tenancy address acquisition VNI DHCP Option format VNI DHCPv6 Option format

  6. Solution 2: IPv4/IPv6 Rendezvous Point (RP) Option for DHCP/DHCPv6 IPv4 Rendezvous Point Address Option Format IPv6 Rendezvous Point Address Option Format

  7. Solution 3: IPv4/IPv6 Multicast Address Option for DHCP/DHCPv6 IPv4 Multicast Address Option Format IPv6 Multicast Address Option Format

  8. Please comment and help us improve the draft

  9. Thank you

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