Ethernet Recieve Buffer size
20-07-2021, 03:03
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#1
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Ethernet Recieve Buffer size
Im attempting to change the buffer size of my ethernet card from 512 to 1024 but i kept being told that the size is to high even though according to the net the max size is 2048.
Its a Realtek 8125 2.5g chipset card.
Anyone have any ideas?
Thanks.
Ive attached a screen shot to.
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20-07-2021, 09:52
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#2
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cf.mega poster
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Re: Ethernet Recieve Buffer size
Have you set the transmit buffer to 2048?
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20-07-2021, 10:06
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#3
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Re: Ethernet Recieve Buffer size
yes.
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20-07-2021, 10:21
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#4
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067
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Re: Ethernet Recieve Buffer size
Whats your MTU set to ?
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20-07-2021, 13:31
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Re: Ethernet Recieve Buffer size
MTU is 1500
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20-07-2021, 15:04
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#6
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067
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Re: Ethernet Recieve Buffer size
I think (but I could be wrong) that your MTU needs upping, from what I can gather your trying to utilise jumbo frames ? IIRC MTU should be 9216
Again this is old knowledge so could be wrong
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20-07-2021, 17:41
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#7
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Re: Ethernet Recieve Buffer size
i have never known an MTU to be that high.
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20-07-2021, 18:27
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#8
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Re: Ethernet Recieve Buffer size
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20-07-2021, 20:10
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#9
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Re: Ethernet Recieve Buffer size
Quote:
Originally Posted by alanbjames
i have never known an MTU to be that high.
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For good reason, you would have terrible fragmentation.
1500 is generally what you need. You can test with ping if you want.
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20-07-2021, 20:52
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#10
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067
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Re: Ethernet Recieve Buffer size
Quote:
Originally Posted by Paul
For good reason, you would have terrible fragmentation.
1500 is generally what you need. You can test with ping if you want.
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A jumbo frame (if that’s what being used) will not work with an mtu of 1500
Frame type MTU Payload size
Standard 1500 1460 byte
Jumbo 9000 8960 byte
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22-07-2021, 01:37
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#11
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Re: Ethernet Recieve Buffer size
Quote:
Originally Posted by mrmistoffelees
A jumbo frame (if that’s what being used) will not work with an mtu of 1500
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Which is why they are about as useful as an ashtray on a moterbike.
Unless you are only using your network card internally to connect devices, and they ALL support Jumbo frames, and ALL have a large MTU set.
They are of little/no use for Broadband.
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22-07-2021, 09:29
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#12
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067
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Re: Ethernet Recieve Buffer size
Quote:
Originally Posted by Paul
Which is why they are about as useful as an ashtray on a moterbike.
Unless you are only using your network card internally to connect devices, and they ALL support Jumbo frames, and ALL have a large MTU set.
They are of little/no use for Broadband.
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Absolutely, as you say only any use for internal LAN.
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