[FD] ICMPv6 PTBs and IPv6 frag filtering (particularly at BGP peers)

Folks, I'm curious about whether folks are filtering ICMPv6 PTB<1280 and/or IPv6 fragments targeted to BGP routers (off-list datapoints are welcome). In any case, you mind find it worth reading to check if you're affected (from Section 2 of recently-published RFC8021):

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