OpenWRT PPPoE: Difference between revisions
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Created page with "The first most important item to remember is that PPPoE IP Frames are limited to 1492 Bytes. OpenWRT claims that the "MSS Clamping" Feature (option mtu_fix in the /etc/config..." |
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The first most important item to remember is that PPPoE IP Frames are limited to 1492 Bytes. | The first most important item to remember is that PPPoE IP Frames are limited to 1492 Bytes. | ||
OpenWRT claims that the "MSS Clamping" Feature (option mtu_fix in the /etc/config/firewall file) | OpenWRT claims that the "MSS (Maximum Segment Size) Clamping" Feature (''option mtu_fix '1'<nowiki/>'' in the /etc/config/firewall file) takes care of this (it even gets added automatically when configuring a PPPoE WAN Interface), but in reality it is safer to manually configure it: ''option mtu 'WhatEverValue''' (1492 in the case of PPPoE) in the /etc/config/network file. | ||
https://en.wikipedia.org/wiki/Point-to-Point_Protocol_over_Ethernet | |||
https://en.wikipedia.org/wiki/Path_MTU_Discovery | |||
Revision as of 22:13, 24 November 2020
The first most important item to remember is that PPPoE IP Frames are limited to 1492 Bytes.
OpenWRT claims that the "MSS (Maximum Segment Size) Clamping" Feature (option mtu_fix '1' in the /etc/config/firewall file) takes care of this (it even gets added automatically when configuring a PPPoE WAN Interface), but in reality it is safer to manually configure it: option mtu 'WhatEverValue' (1492 in the case of PPPoE) in the /etc/config/network file.
https://en.wikipedia.org/wiki/Point-to-Point_Protocol_over_Ethernet