Computers & Electronics

MTU size with VDSL in bridge mode

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  • Dec 30th, 2020 5:33 pm
[OP]
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Sep 13, 2011
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Québec

MTU size with VDSL in bridge mode

Hi,

Does someone know how to do it ? I am unable to edit my SmartRG 505n configuration to lower the mtu size :(
8 replies
Deal Fanatic
Sep 16, 2013
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elgros4 wrote: Hi,

Does someone know how to do it ? I am unable to edit my SmartRG 505n configuration to lower the mtu size :(
If you are in bridge mode the MTU size is set in the router.
[OP]
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Sep 13, 2011
1272 posts
861 upvotes
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alpovs wrote: If you are in bridge mode the MTU size is set in the router.
I don't use a router, I connect directly with windows pppoe, so the Mtu would be set in windows ?
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Sep 16, 2013
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elgros4 wrote: I don't use a router, I connect directly with windows pppoe, so the Mtu would be set in windows ?
Then, yes. MTU is applicable to the PPPoE protocol for the connection established by your Windows PC. The modem in bridge mode won't have anything to do with it. I don't know for sure but I guess Windows would use the proper MTU of 1492 because it is standard for PPPoE. You can test if you already have the correct MTU set by pinging:
https://kb.netgear.com/19863/Ping-Test- ... -on-Router
https://www.pcwdld.com/ping-mtu
[OP]
Deal Addict
Sep 13, 2011
1272 posts
861 upvotes
Québec
alpovs wrote: Then, yes. MTU is applicable to the PPPoE protocol for the connection established by your Windows PC. The modem in bridge mode won't have anything to do with it. I don't know for sure but I guess Windows would use the proper MTU of 1492 because it is standard for PPPoE. You can test if you already have the correct MTU set by pinging:
https://kb.netgear.com/19863/Ping-Test- ... -on-Router
https://www.pcwdld.com/ping-mtu
Thanks, I have solved my bug. I did a test with the modem directly with mtu 1492 and it work.

Then, I replug my router and change the default TP-link MTU of 1480 to 1492, and now my cisco anyconnect vpn from work is now super fast.



Thanks, 1492
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Oct 19, 2007
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elgros4 wrote: I don't use a router, I connect directly with windows pppoe, so the Mtu would be set in windows ?
I strongly suggest not relying on Windows' firewall while directly connected to the open internet...
[OP]
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Sep 13, 2011
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wally_walrus wrote: Firewall is needed for way more then protection against viruses...
by virus, I meant any form of malware.

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