has anybody tried to implement /127 IPv6 transport networks with S-Series switches? Is some special configuration necessary for this to work?
The S-Series release notes
list RFC 6164
, Using 127-Bit IPv6 Prefixes on Inter-Router Links
, as supported. I did not find any specific configuration advice in the manuals, GTAC Knowledge, or The Hub. Thus I simply configured a routable IPv6 address with /127 mask on the layer 3 interfaces, similar to using /31 networks with IPv4 (see RFC 3021
). But after configuring the higher IPv6 address in the network, the switch answered to the lower IPv6 address as well, just as if the /127 network had a Subnet-router anycast address
contrary to RFC 6164 section 6. This problem is described by RFC 3627
, Use of /127 Prefix Length Between Routers Considered Harmful
, which has been move to Historic
status by RFC 6547
, section 3.
Is any special configuration needed to use /127 subnets on the S-Series?
(I have tried to use /127 subnets inside a VRF on S-Series switches with firmware 8.42.05.0003
(At a first look /127 subnets seem to work on EXOS.)