Extension of logical networks across layer 3 virtual private networks

A method for managing a multi-tenant site comprising a plurality of host computers executing managed forwarding elements (MFEs) that forward data in the multi-tenant site, the method comprising:

• configuring a first plurality of MFEs to implement a first logical forwarding element (LFE) that (i) spans the first plurality of MFEs and (ii) forwards data for a first set of machines having addresses in a first address space;
• configuring a second plurality of MFEs to implement a second LFE that (i) spans the second plurality of MFEs and (ii) forwards data for a second set of machines having addresses in a second address space;
• and
• configuring a particular MFE that belongs to both the first and second pluralities of MFEs to forward data to a first tenant site at a first geographic location using the first address space and a second tenant site at a second different geographic location using the second address space.

A non-transitory machine readable medium storing a program for managing a plurality of tenant networks spanning a plurality of physical sites, the program comprising sets of instructions for:

• configuring a first plurality of managed forwarding elements (MFEs) executing on a first set of host computers at a first multi-tenant datacenter to implement a first logical forwarding element (LFE) and a second LFE;
• and
• configuring a second plurality of MFEs executing on a second set of host computers at a second multi-tenant datacenter to implement the first LFE and the second LFE;
• wherein the first LFE spans both the first and the second pluralities of MFEs, and the second LFE spans both the first and the second pluralities of MFEs;
• wherein the first LFE is for forwarding packets for a first tenant network and the second LFE is for forwarding packets for a second tenant network.