#16805: Upgrade PPP to 2.4.6
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Reporter: anonymous | Owner: developers
Type: enhancement | Status: closed
Priority: normal | Milestone: Barrier Breaker (trunk)
Component: base system | Version: Trunk
Resolution: fixed | Keywords:
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Comment (by anonymous):
Replying to [comment:2 anonymous]:
> What does that mean for people having pppoe for example and mtu of 1492?
Should I deactivate the mss clamping option under firewall?
If your PPPoE connection is negotiated with a 1500 MTU MSS clamping won't
be needed and so, i think, won't be used. No need to uncheck the option.
Negotiating a 1500 MTU requires a few more things.
1) Your ISP needs to support RFC 4638. All FTTC connections in the UK
(and many in Europe) using PPPoE support this.
2) Your router's switch needs to support at least Baby Jumbo Frames.
Many switches already support these under OpenWrt.
If both these conditions are met, to get this to work you should only need
to set your WAN's underlying ethernet interface to a MTU of 1508. The new
PPP should then negotiate a MTU of 1500 with the ISP. If it can't
negotiate a 1500 MTU it'll fall back to 1492.
This also closes bug #14528
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Ticket URL: <https://dev.openwrt.org/ticket/16805#comment:3>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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