In what scenarios, a diameter node maintains two connection with peer ?

Question

I went through an article of diameter, it mentions " Diameter standard advises that a diameter node to maintain two connection primary and secondary connection". Diameter node uses first connection in normal conditions and go for second one if primary connection is abrupted or not available. How far it is correct and where it is used exactly ?

Answer 1

This is called multi-homing and is used by SCTP also.
This is to prevent any kind of down time and two nodes can have multiple links between each other over the same ip address or different ip addresses / Interfaces.

Answer 2

On behalf of Bart (https://www.facebook.com/groups/LTE.Professionals/?fref=nf ) -

Isn't this normal redundancy? I'm doing similar but equally costs multi path on Gn or Gi when designing solutions.