Stretch Single Internet Service Across Dual MX Units

[_Mark_]

Hi,

Is it possible to stretch a single internet service using a /30 across a dual MX configuration using a layer 2 switch? Like the attached diagram.

Our service providers are generally unwilling to provide a /29 range or a dual-hand off, but we want to be able to have this connection to both MX devices at a site as a warm spare. We've had some partners at a high-level comment that it's possible but haven't actually seen it work and would expect we need to use a layer 3 switch in between.

Layer 2 Example:

Layer 3 Example:

[cmr · Accepted solution]

@_Mark_ in a word, no.  You would either need a router and NAT the 1 IP to an internal 2-3 IPs or get a /29.  Each MX needs a public IP in the same subnet on the WAN port and ideally a third floating one (virtual IP) that the traffic actually uses.

[_Mark_]

Thanks, that is the solution we were coming too. Great to have confirmation.