9 Feb
2011
9 Feb
'11
6:17 a.m.
Global scope addresses on router-to-router interfaces are necessary today for traceroute to work. Some ISPs are *requiring* working traceroute (without MPLS hiding of intermediate hops) in RFPs to transit providers.
If you can get router ICMP handling changed such that the ICMP packet generated by traceroute is sent from the loopback address, we might be able to do without global scope addresses on router-to-router interfaces. But until then...
You can do it on C and J vendor. Without link-local ICMPv6 will use loopback0. Example on C: ipv6 unnumbered loopback0
I'm afraid I don't consider this an alternative. I *like* global link addresses for our core routers - and so does our NOC. Steinar Haug, Nethelp consulting, sthaug@nethelp.no