Use the following rules and syntax to configure at the mirror source node:
The sdp-id must match an SDP which uses LDP IPv6 FEC.
Configuring egress-vc-label is optional.
config mirror mirror-dest 10
no spoke-sdp sdp-id:vc-id
    — spoke-sdp sdp-id:vc-id [create]
        — egress
            — vc-label egress-vc-label