-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2017-06-28 17:03, William Herrin wrote:
The common recommendations for IPv6 point to point interface numbering are:
/64 /124 /126 /127
I thought the only allowed subnet prefix lengths for IPv6 were /64 and /127. RFC 4291 states: For all unicast addresses, except those that start with the binary value 000, Interface IDs are required to be 64 bits long and to be constructed in Modified EUI-64 format. (and addresses starting with 000 are only used for special things, like the localhost address ::1). And then RFC 6164 adds /127 to the allowed prefix lengths. I know that many devices allow you to configure any subnet size, but is there any RFC allowing you to use e.g. /124 or /126? /Bellman -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJZVBsFAAoJEGqUdKqa3HTsoDEP/10rXGS7TN/3aEG+IfwyQ3bP +mvNu/uV8Jv8PGfXgjIdD8gr07MqxoGP0pLFB2bEGrQ9dLJVhkLIpksSx6Q6su3y Ym5wDpB/DZnQ1uESN69T4xJtt32Or6L7+/NhehnVfDvoHOd79t9sNuaOu+/z8c2K +OOyc8TwTX+HVhoGfHa4dG7BPh7rUgzZImuGsycpElbt4r75qByZyztPCgjWRTg1 f0/leuFVvIwTA5OY8ZX7WPzdLiOU3f0H6NlKKYZUSsZQCDQfp8DU2S85fj3ZWVB3 vRJKUT2hVF0/q13tK7C16QGpr28hue6xEnscE2GZ3xrjI1yteNZLvbRjQJbco8D0 Z8UHTiUSwdYZgKViVgmxFDS7mrTZCrwwrZMI44mPwub3txgLEEzXmkwMDSvRYVL9 9nAVzCvt3+QKrR1zNQD8ttt0Xg+QENTdTD0NI8iMMkFENXC82cuV1y3UnHYRORdJ r2Uupzps3eQlxa1Uk7SC4sDs17PmBEVpFCtbtEZjCFYdc3PlDmV6wu6/WuXutMox eVDTMgHN3m16ZOXY2U4V5PmW3xvqQ/J+vzE7WyKe5DP5bZPHlddupw4MPPz7+8IG 4O5wOqjAFX8HhNpPMZZjUHxrWvYLEYvGzn8GI06tLKb49+Wq3ux4i2HUUHm/jIf+ GMOQkPABxUntAaPjOzzX =IMMo -----END PGP SIGNATURE-----