The advertised MSS depends on the first hop route MTU, but will
never be lower than this setting.
-rt_cache_rebuild_count - INTEGER
- The per net-namespace route cache emergency rebuild threshold.
- Any net-namespace having its route cache rebuilt due to
- a hash bucket chain being too long more than this many times
- will have its route caching disabled
-
IP Fragmentation:
ipfrag_high_thresh - INTEGER