[isp-bgp] Discontiguous AS

["Greenhalgh, John" <JGreenhalgh@...]

Hi,

We currently have a single AS and we are starting a new network other side
of the States. The two networks will be discontiguous. Both networks will be
multi-homed to Tier 1 providers and we must support BGP to customers.

Any ideas of how we can support two discontiguous ASs but still using the
same AS number. We foresee the problem where loop avoidance mechanisms will
stop the ASs learning each other's routes.

Ideas so far are to use statics at our network egress, or to tunnel sessions
between the two networks, both of which seem messy.

Has anyone got any ideas how we can do this without 'bodging' it?

John

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