Sven Ubik wrote:

But I have a problem to get IPv6 packets with this version of
libpcap or tcpdump (I don't know where is the problem), it reports:

# tcpdump -n -vvv mpls and ip6
tcpdump: ip6 not supported

By default, the configure scripts for libpcap and tcpdump don't enable IPv6 filters (in libpcap) and dissection (in tcpdump). They have to be configured with "--enable-ipv6" to support IPv6.

(I don't know why it's not the default. Is there any reason not to make it the default these days?)
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