MTU/MRU mess fixed by IETF draft with new PPP-Max-Payload tag -- RP-PPPoE User Forum

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Subject: MTU/MRU mess fixed by IETF draft with new PPP-Max-Payload tag

Author:
Odin Trisk
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Date Posted: 02:35:30 2008-03-31 Mon
Author Host/IP: 86.154.78.206
Does RP-PPPoE support "PPP-Max-Payload" for baby-jumbo/jumbo ethernet frames, to allow larger than IEEE 1500 MTU across the ethernet segment.

Many Gigabit capable ethernet cards support jumbo frames.
i.e. we just want MTU=1508 "ifconfig eth0 mtu 1508" to get around needing to MSS clamp and fragment regular ethernet traffic.

A quick look over the source code to rp-pppoe indicates the last version was created on "2 April 2006" but this IETF draft was only published in March 2006 so I guess it does not support the feature.

Is there any momentum to add this feature ?

http://tools.ietf.org/html/draft-arberg-pppoe-mtu-gt1492-03

Tag-name: PPP-Max-Payload
Tag-value: 0x0120
Tag-length: 2 octets
Tag-value: binary encoded value (max PPP payload in octets)

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>Does RP-PPPoE support "PPP-Max-Payload" for >baby-jumbo/jumbo ethernet frames, to allow larger than >IEEE 1500 MTU across the ethernet segment. > >Many Gigabit capable ethernet cards support jumbo >frames. >i.e. we just want MTU=1508 "ifconfig eth0 mtu 1508" to >get around needing to MSS clamp and fragment regular >ethernet traffic. > >A quick look over the source code to rp-pppoe >indicates the last version was created on "2 April >2006" but this IETF draft was only published in March >2006 so I guess it does not support the feature. > >Is there any momentum to add this feature ? > > >http://tools.ietf.org/html/draft-arberg-pppoe-mtu-gt149 >2-03 > >Tag-name: PPP-Max-Payload > Tag-value: 0x0120 > Tag-length: 2 octets > Tag-value: binary encoded value (max PPP payload >in octets)
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