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The BGP import policy "north-and-south" on R5 checks the community attribute of incoming routes.

If the community matches "65200:1", it sets the local preference to 20.

Since R1 advertises the prefix 140.100.1.0/24 with a community of "65200:1", R5 will apply the policy action.

Therefore, the prefix's local preference is set to 20.

References:

Nokia Border Gateway Protocol Fundamentals documentation, Section 5.2 on BGP policies.

On the Nokia 7750 SR, BGP supports several address families, including IPv4, VPN-IPv4, and MP-EVPN.

However, Label-IPv4 is not a recognized address family supported by BGP on this platform.

References:

Nokia Border Gateway Protocol Fundamentals documentation, Section 6.1 on BGP address families.