Refer to the exhibit. A network operator is working to deploy a Unified BGP design and allow it to be available only in selected markets and services in the future. The label allocation is not functio

Question

Exhibit

Options

• ARemove the allocate-labels command.
• BReconfigure the route-policy ALL_LABELS to match all after the drop.
• CReconfigure the route-policy ALL_LABELS to pass.
• DRemove the route policy and only configure "allocate-label".

• A
  10% (2)
• B
  5% (1)
• C
  80% (16)
• D
  5% (1)

Explanation

In a Unified BGP (BGP-LU) design on Cisco IOS XR, the allocate-label command under the BGP address-family is used to control which prefixes receive MPLS label allocations. This command references a route-policy to filter which routes get labels. If the route-policy ALL_LABELS is misconfigured - for example, containing a drop action or not explicitly passing routes - then no labels will be allocated for the intended prefixes, breaking BGP-LU functionality. The fix is to reconfigure the route-policy ALL_LABELS to use pass, which instructs IOS XR to allocate labels to all matched routes. Option A (removing allocate-labels) would disable label allocation entirely. Option B (matching all after drop) is logically incorrect since drop terminates policy processing. Option D (removing the route-policy and keeping only allocate-label) would work only if the default policy passes all routes, but the proper fix is to correct the policy to pass.

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