[Cerowrt-devel] Baby jumbo frames support?

Alexander Hulse ah at amch.net
Sat Jun 16 05:53:58 EDT 2012

I've done some basic research and some (unsuccessful) hacking the on the driver source for the ag71xx driver and was wondering about baby jumbo frame support?

I know that the WNDR37/800's built in switch supports passing jumbo frames, but the underlying router interfaces do not support large MTU frames.

However, this:


seems to imply that the built-in interfaces ought to support baby jumbo frames, unless I'm misunderstanding what they are saying.

As to the "Why?", in the UK, the fibre offering by BT using FTTC uses a PPPoE modem that can understand PPPoE packets with an MTU 1508, as described in RFC 4638.

It was possible using a Netgear WNR834T with the application of some patches from the pppd git:


Would this be a useful feature to add (if possible) to CeroWrt so that full sized frames can be used if the ISP / connection supports it?


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