The NTP implementation in Cisco IOS 15.1 and 15.5 and...

15.1\(1\)s, 15.1\(1\)s1, 15.1\(1\)s2, 15.1\(2\)s, 15.1\(2\)s1, 15.1\(2\)s2, 15.1\(3\)s, 15.1\(3\)s0a, 15.1\(3\)s1, 15.1\(3\)s2, 15.1\(3\)s3, 15.1\(3\)s4, 15.1\(3\)s5, 15.1\(3\)s5a, 15.1\(3\)s6, 15.5\(1\)s, 15.5\(1\)s1, 15.5\(1\)s2, 15.5\(1\)s3, 15.5\(1\)s4, 15.5\(2\)s, 15.5\(2\)s1, 15.5\(2\)s2, 15.5\(2\)s3, 15.5\(2\)t, 15.5\(3\)m, 15.5\(3\)m0a, 15.5\(3\)m1, 15.5\(3\)s, 15.5\(3\)s0a, 15.5\(3\)s1, 15.5\(3\)s1a, 15.5\(3\)sn, 3.2.0ja, 3.2.0s, 3.2.0se, 3.2.0sg, 3.2.0xo, 3.2.1s, 3.2.1se, 3.2.1sg, 3.2.1xo, 3.2.2s, 3.2.2se, 3.2.2sg, 3.2.3s, 3.2.3se, 3.2.3sg, 3.2.4sg, 3.2.5sg, 3.2.6sg, 3.2.7sg, 3.2.8sg, 3.2.9sg, 3.2.10sg, 3.3.0s, 3.3.0se, 3.3.0sg, 3.3.0sq, 3.3.0xo, 3.3.1s, 3.3.1se, 3.3.1sg, 3.3.1sq, 3.3.1xo, 3.3.2s, 3.3.2se, 3.3.2sg, 3.3.2xo, 3.3.3se, 3.3.4se, 3.3.5se, 3.4.0as, 3.4.0s, 3.4.0sg, 3.4.0sq, 3.4.1s, 3.4.1sg, 3.4.1sq, 3.4.2s, 3.4.2sg, 3.4.3s, 3.4.3sg, 3.4.4s, 3.4.4sg, 3.4.5s, 3.4.5sg, 3.4.6s, 3.4.6sg, 3.4.7sg, 3.5.0e, 3.5.0s, 3.5.0sq, 3.5.1e, 3.5.1s, 3.5.1sq, 3.5.2e, 3.5.2s, 3.5.2sq, 3.5.3e, 3.6.0e, 3.6.0s, 3.6.1e, 3.6.1s, 3.6.2ae, 3.6.2e, 3.6.2s, 3.6.3e, 3.6.4e, 3.7.0bs, 3.7.0e, 3.7.0s, 3.7.0xas, 3.7.1as, 3.7.1e, 3.7.1s, 3.7.2e, 3.7.2s, 3.7.2ts, 3.7.3e, 3.7.3s, 3.7.4as, 3.7.4s, 3.7.5s, 3.7.6s, 3.7.7s, 3.8.0e, 3.8.0ex, 3.8.0s, 3.8.1e, 3.8.1s, 3.8.2s, 3.9.0as, 3.9.0s, 3.9.1as, 3.9.1s, 3.9.2s, 3.10.0as, 3.10.0s, 3.10.1s, 3.10.01s, 3.10.1xbs, 3.10.2s, 3.10.2ts, 3.10.3s, 3.10.4s, 3.10.5s, 3.10.6s, 3.10.7s, 3.11.0s, 3.11.1s, 3.11.2s, 3.11.3s, 3.11.4s, 3.12.0as, 3.12.0s, 3.12.1s, 3.12.2s, 3.12.3s, 3.12.4s, 3.13.0as, 3.13.0s, 3.13.1s, 3.13.2as, 3.13.2s, 3.13.3s, 3.13.4s, 3.13.5s, 3.14.0s, 3.14.1s, 3.14.2s, 3.14.3s, 3.14.4s, 3.15.0s, 3.15.1cs, 3.15.1s, 3.15.2s, 3.15.3s, 3.16.0cs, 3.16.0s, 3.16.1as, 3.16.1s, 3.16.2as, 3.16.2s, 3.16.3s, 3.17.0s, 3.17.1s