Brian,
From: https://linux.die.net/man/8/ip
'INHERIT' is the default value, this us why you must set a TTL.
- KB3VWG
ttl N
set a fixed TTL N on tunneled packets. N is a number in the range 1--255. 0 is a special value meaning that packets inherit the TTL value. The default value for IPv4 tunnels is: inherit. The default value for IPv6 tunnels is: 64.
I'm glad it does work, and now I'm puzzled by why it didn't work when I tried it a few days ago.
Thank you! - Brian