diff options
| -rw-r--r-- | include/ZeroTierOne.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/ZeroTierOne.h b/include/ZeroTierOne.h index 3f8ce8e4..36c29c96 100644 --- a/include/ZeroTierOne.h +++ b/include/ZeroTierOne.h @@ -102,10 +102,11 @@ extern "C" { /** * Default UDP payload size (physical path MTU) not including UDP and IP overhead * - * This is 1500 - IPv6 UDP overhead - PPPoE overhead and is safe for 99.9% of - * all Internet links. + * This is small enough for PPPoE and for Google Cloud's bizarrely tiny MTUs. + * A 2800 byte payload still fits into two packets, so this should not impact + * real world throughput at all vs the previous default of 1444. */ -#define ZT_DEFAULT_PHYSMTU 1444 +#define ZT_DEFAULT_PHYSMTU 1432 /** * Maximum physical UDP payload |