Tom's Hardware > Forum > General Networking > General Gateways, Routers and Firewalls > Gigabit LAN w/ Jumbo Frames: Impact on WAN access (non-JF)?

Gigabit LAN w/ Jumbo Frames: Impact on WAN access (non-JF)?

Forum General Networking : General Gateways, Routers and Firewalls - Gigabit LAN w/ Jumbo Frames: Impact on WAN access (non-JF)?

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mikehd   12-23-2005 at 04:27:39 PM

Greetings all,

I've read the Netgear GS108 Gigabit switch review and the Asus RX3134 Gigabit Switch/Router and have a question on how the RX3134 handles the traversal from the JF enabled Gigabit LAN to the non-JF WAN (10MbT aDSL in my case).

Does it pass the JF intact, allowing the dsl or cable modem to deal with it, or does it break it up into 1500 Byte segments?

Any real world issues with not using a JF capable router to get to the WAN?

thanks...

Update: from what I read on other forums, it would appear that I would experience increased fragmentation of the packets (I had assumed this), and perhaps increased latency as a result.

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Riser   12-27-2005 at 05:11:08 PM
- 0 +

Everything is broken down after 1500.. but the header gets an additional 18 tacked on there..

1482 is the max, but I always tell people to error on the side of caution and go with 1470s just to leave a little extra room.

Most of the time you won't notice minor fragmentation, but it can drag you down if you have enough traffic.. routers are generally good at dealing with it on the SOHO level.

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