> Unless you configure two /128's pointing to the remote side, which will > then thus not be 'on-link for neighbor discovery, the little thing > called the subnet anycast address will make sure that a /127 ptp simply > does not work, unless you have a platform which disables the subnet > anycast address of course.
It would seem disabling the subnet anycast is fairly widespread, then. I have verified the use of /127 on several hardware forwarding platforms from Cisco and Juniper. /127 works just fine, and prevents the ping-pong. [One concrete example where /127 works: Juniper T1600 talking to Cisco CRS-1 on an OC-768/STM-256 link.] Steinar Haug, Nethelp consulting, [email protected] -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
