we have a CRS317 on point A and a CRS305 on Point B..and connected on boths CRS devices running switchOS mode.. we have 2 CCRs1036 on both sides..
both devices are connected via IPv4 on 10G SFP+ ports..
now i have setup a ipv6 1/126 IP on BGP point A… and 2/126 IP on BRAS PointB device…
but i cannot ping each other.. hooked via the CRS devices.. bot running on SwitchOS 2.13 firmware version…
it simply just not pings at all..
And yes IPV6 enabled on both CCRs on both ends..
So i made a new test… hooked up Ether4 from point A BGP directly attached to Ether4 BRAS.. setup the same IPs on both ends.. 1/126 sidea A and 2/126 side B…
and i can ping both ends.. and i can PING BRAS point B to outside ipv6 addresses.. so the issue is related to the CRS devices running switchOS.. simply not forwarding any IPV6 packets
so is there anything that needs to be done to pass ipv6 packets trough both CRS switches passing packets ipv6?
And i am not planning rebooting the switches into RouterOS mode.. would not be an option.. or CRS only forwards packets IPV6 in routerOS mode?
TL;DR … if you have IGMP snooping enabled on switches, disable it and see if it works then.
I don’t have first-hand experience with SwOS, but AFAIK IGMP snooping on both SwOS and ROS is broken and breaks IPv6. At least that was the case in ROS v6 and I haven’t checked it with recent ROS versions. Since SwOS is developed much less actively than ROS, I assume they’re even less likely to fix it.
