Tunnel of IPv6 Over IPv4 not accespting Jumbo Packets
Tunneling of IPv6 over IPv4 work fine for me. But if i send a large packets say 2000 bytes, it reaches the destination but does not comes back using a simple ping command as below.
ping 10.131.224.111 -s 2000 --> this works
ping6 2003::52 --> this works
ping6 2003::52 -s 2000 --> this does not work
My configuration is available in this page - https://unix.stackexchange.com/questions/610575/how-to-enable-fragmentation-in-ipsec-tunnel-for-ipv6-over-ipv4
Not sure what i am missing.. I also tried adding MTU in ipsec configuration but did not help.
[root@sys-123 ~]# ipsec --version
Linux Libreswan 3.25 (netkey) on 3.10.0-1127.10.1.el7.x86_64
#1 Updated by Tobias Brunner 4 months ago
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Please don't cross-post. You should try to get PMTUD working (i.e. make sure ICMPv6 are not blocked) and if that doesn't work, you may have to manually reduce the MTU (either via route or interface, VTI/XFRMI could also be used), also see ForwardingAndSplitTunneling.