tailscale/net/tstun/constants.go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause

package tstun

// DefaultMTU is the Tailscale default MTU for now.
//
// wireguard-go defaults to 1420 bytes, which only works if the
// "outer" MTU is 1500 bytes. This breaks on DSL connections
// (typically 1492 MTU) and on GCE (1460 MTU?!).
//
// 1280 is the smallest MTU allowed for IPv6, which is a sensible
// "probably works everywhere" setting until we develop proper PMTU
// discovery.
const DefaultMTU = 1280
all: update copyright and license headers This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com> 2 years ago			`// Copyright (c) Tailscale Inc & AUTHORS`
			`// SPDX-License-Identifier: BSD-3-Clause`
wgengine/netstack: make netstack MTU be 1280 also Updates #3878 Change-Id: I1850085b32c8a40d85607b4ad433622c97d96a8d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> 2 years ago
			`package tstun`

			`// DefaultMTU is the Tailscale default MTU for now.`
			`//`
			`// wireguard-go defaults to 1420 bytes, which only works if the`
			`// "outer" MTU is 1500 bytes. This breaks on DSL connections`
			`// (typically 1492 MTU) and on GCE (1460 MTU?!).`
			`//`
			`// 1280 is the smallest MTU allowed for IPv6, which is a sensible`
			`// "probably works everywhere" setting until we develop proper PMTU`
			`// discovery.`
			`const DefaultMTU = 1280`