Regarding end.dt4, decapsulation and specific IPV4 lookup table, which is the wrong statement?

Question

Options

• AFor L3VPN scenarios, it is required to search in the VPN FIB of the egress PE.
• BSID can use the SID anywhere in the segment list
• CCheck the private network FIB of V4 based on the inner IPv4 DA
• DYou can use the destination address of IPV6 packets without SRH header

• A
  3% (1)
• B
  77% (30)
• C
  8% (3)
• D
  13% (5)

Explanation

End.DT4 is an SRv6 endpoint behavior - the key word being endpoint. Because it carries the "End" designation, this SID must appear as the last (and only active) SID in the segment list, not anywhere within it. Placing End.DT4 mid-list violates the SRv6 architecture, making option B the wrong statement.

Options A, C, and D are all accurate descriptions of End.DT4 behavior: (A) is correct because L3VPN requires the egress PE to resolve the customer destination against the specific VPN FIB (VRF); (C) is correct because the actual DT4 action is precisely to strip the outer IPv6 header and perform a lookup on the inner IPv4 destination address; (D) is correct because SRv6 allows a packet to arrive without an SRH, using the IPv6 DA directly as the active SID - a legitimate and common delivery method.

Memory tip: Tie "End" to "endpoint = end of the road." Any SID prefixed with End is a terminal action - it only fires at the last stop, never in the middle of a journey.

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