Which statement describes the no bgp default route-target filter command?

Question

Options

• APrefixes that are received with route targets and distinguisher are accepted.
• BPrefixes that are received with route targets and distinguisher are not accepted.
• CPrefixes that are received with route targets that are not imported at the PE are not accepted.
• DPrefixes that are received with route targets that are not imported at the PE are accepted.

• A
  4% (2)
• B
  6% (3)
• C
  17% (8)
• D
  73% (35)

Explanation

By default, a PE router silently drops VPNv4/VPNv6 prefixes whose route targets don't match any locally configured VRF import RT - this conserves memory and prevents unnecessary route storage. The no bgp default route-target filter command disables that filter, so the PE accepts and stores ALL received VPN prefixes regardless of whether their RTs are locally imported, making D correct.

Why the distractors are wrong:

• A & B are wrong because they introduce "route distinguisher" as a filtering criterion - RDs identify routes but play no role in RT-based filtering logic.
• C describes the default behavior (filter on), which is the exact opposite of what no bgp default route-target filter does.

Memory tip: Think of the command literally - no bgp default route-target filter = "turn OFF the RT filter," so previously-rejected prefixes (those with non-imported RTs) now get in. Any time you see no before a filter command, the result is more permissive, not less.

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