Using a control plane to set a preferred egress point in multi-site logical routers

A non-transitory computer-readable storage medium containing instructions, that when executed, control a first computing device to be operable for:

• receiving a selection of a logical router in the first computing device in a first site of a plurality of sites as a preferred egress point to an external network for the logical router, wherein the logical router is instantiated on computing devices in the plurality of sites, and wherein a single site in the plurality of sites is the preferred egress point for the logical router;
• storing identification information for the logical router in a routing table that stores identification information for multiple logical routers, wherein the identification information is unique among multiple logical routers;
• and
• advertising, via a routing instance in a control plane to other computing devices in other sites in the plurality of sites the identification information, for the logical router to indicate the logical router in the first computing device in the first site is the preferred egress point, wherein a second computing device in a second site uses the identification information to set a next hop address for the logical router in the second site as an address for the logical router in the first computing device in the first site.

A first computing device comprising:

• one or more computer processors;
• and
• a non-transitory computer-readable storage medium comprising instructions, that when executed, control the one or more computer processors to be operable for:
• receiving a selection of a logical router in the first computing device in a first site of a plurality of sites as a preferred egress point to an external network for the logical router, wherein the logical router is instantiated on computing devices in the plurality of sites, and wherein a single site in the plurality of sites is the preferred egress point for the logical router;
• storing identification information for the logical router in a routing table that stores identification information for multiple logical routers, wherein the identification information is unique among multiple logical routers;
• and
• advertising, via a routing instance in a control plane to other computing devices in other sites in the plurality of sites, the identification information for the logical router to indicate the logical router in the first computing device in the first site is the preferred egress point, wherein a second computing device in a second site uses the identification information to set a next hop address for the logical router in the second site as an address for the logical router in the first computing device in the first site.