You choose the EBGP design shown in the exhibit as your IP fabric design. You must ensure that both routes received by the spine nodes will be used for ECMP forwarding.
Which BGP parameter would need to be added to the EBGP configuration of the spine nodes to achieve this goal?
To ensure ECMP (Equal-Cost Multi-Path) forwarding with both routes received by the spine nodes in an EBGP design, the configuration should include the 'multipath multiple-as' parameter. This allows the router to consider multiple paths to different autonomous systems, enabling load balancing between these routes. The 'multipath' option alone is typically used within the same autonomous system (IBGP), whereas 'multipath multiple-as' is specifically for external routing scenarios (EBGP) as depicted in the design.
A is correct one.
A is correct in case of EBGP we use : multipath multiple-as in case of IBGO we use multipath
A: Multipath load balancing (ECMP) to multiple AS numbers enables fast fail-over by allowing the RIB to install multiple next hops that point to these different AS numbers. Adding support for extended IPv4 nexthops allows IPv4 route exchange over the IPv6 BGP sessions. https://www.juniper.net/documentation/us/en/software/nce/nce-225-bgp-unnumbered/topics/example/nce-225_bgp_unnumbered-example.html#:~:text=Multipath%20load%20balancing%20(ECMP)%20to,over%20the%20IPv6%20BGP%20sessions.
Yes, A is correct.
A is Correct