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| author | Adam Ierymenko <adam.ierymenko@gmail.com> | 2019-03-08 13:15:47 -0800 |
|---|---|---|
| committer | Adam Ierymenko <adam.ierymenko@gmail.com> | 2019-03-08 13:15:47 -0800 |
| commit | 6fbf21b4f0abb89049e724b3bd625458327b6a77 (patch) | |
| tree | 3b2452d681761567e2586926f5502b8be290a7d3 | |
| parent | 270debb3fc39c3f1f6a3f6fbc2c5fb6183182c8f (diff) | |
| download | infinitytier-6fbf21b4f0abb89049e724b3bd625458327b6a77.tar.gz infinitytier-6fbf21b4f0abb89049e724b3bd625458327b6a77.zip | |
Use a smaller MTU, which should not impact throughput since 2800+overhead/2 still fits in two of these.
| -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 |