Support to set GRE tunnel ttl #199

Currently GRE tunnels inherit the TTL of the overlay packages, this leads to TTL exceeded when you for example send OSPF packages or eBGP packages without multi hop. Would it maybe be possible to add a parameter to set the tunnel TTL.

Thanks, it looks like that the schema is missing some of the GRE specific attributes. Configuring the tunnel TTL would be possible using gre_ttl.

(This would even be possible in older ifstate releases when disabling the schema check using the -s CLI parameter.)

Thanks, i tested the attribute but it seems like it doesn't work even when i use the parameter -s to skip the check. I currently use version 2.2.6 on alpine.

This is the current interface config

 nonbeliver:
 link:
 kind: ip6gretap
 state: up
 master: 
 gre_ttl: 64
 ip6gre_local: 
 ip6gre_remote: 
 ip6gre_link: eth0
 addresses:
 - 

@haktron wrote in #199 (comment):

Thanks, i tested the attribute but it seems like it doesn't work even when i use the parameter -s to skip the check. I currently use version 2.2.6 on alpine.

Please ignore that, I forgot to write ip6 infront of the attribute