Network:    2001:db8:abcd::/56

            2001:            0db8:            abcd:       0000-00ff
0010000000000001:0000110110111000:1010101111001101:00000000xxxxxxxx
└────────────────── routing prefix /56 ───────────────────┘└─ 8 ──┘
bits 64-127: interface ID, all x
