We are planning to setup a Catalyst 3750 (A) to connect to another Catalyst 3750 (B) in the data centre at another site via Fibre.
The default route of A will be the interface that connects to B
The Catalyst 3750 (A) also connects to the ISP as a backup link.
Could anyone please advise the configuration (for A) of automatic failover to ISP link when the Fibre link between A & B goes down?
eBGP with ISP and iBGP or Some IGP is what you would need to configure between your 3750's.
Could you please provide example for the configuration?
Could anyone provide a failover configuration for 3750?
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