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MTU settings

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  • 15-01-2003 1:58pm
    #1
    cherrio
    Registered Users Posts: 383 ✭✭


    What is the best MTU setting? It is currently set at 1492, is there any better setting?

    I am trying to tweak out every bit of speed I can from my ADSL connection, seeing that I am paying through the noise for it.

    I have a ZyXel 645m modem and I use a wireless router (D-liink 614+) to share out the connection. Any suggestions?


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    #2
    BogoBot
    Closed Accounts Posts: 88 ✭✭BogoBot


    http://www.speedguide.net/Cable_modems/cable_reg_win2k.shtml

    This has served me well. (I don't have DSL but some of our users do)

    Bogobot.


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    #3
    longword
    Closed Accounts Posts: 741 ✭✭✭longword


    If your DSL connection uses PPPoE (all the offerings in the country do AFAIK), 1492 is the biggest MTU you can use. If you're using a NATing DSL router or otherwise sharing your connection, all of the clients should have their ethernet card's MTU set to 1492 (the default is 1500).


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    #4
    BlueDrax
    Registered Users Posts: 207 ✭✭BlueDrax


    If your DSL connection uses PPPoE (all the offerings in the country do AFAIK)
    I've just got EsatBT's 512k/256k DSL and a letter that arrived afterwards said that the encapsulation was PPPoA.

    Patrick.


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    #5
    longword
    Closed Accounts Posts: 741 ✭✭✭longword


    Yup, someone else mentioned today that EsatBT are using PPPoA - same as BT in the UK. 1500 MTU would be best for that. Lucky SOBs.


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    #6
    cherrio
    Registered Users Posts: 383 ✭✭cherrio


    I have Eircoms 1Mbit/512K adsl (PPPoE), so should just leave it at 1492?


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    #7
    longword
    Closed Accounts Posts: 741 ✭✭✭longword


    Yes. On the PPP interface you don't have a choice. On other interfaces and other machines on your network, it makes sense to keep the MTU the same to avoid Complications.


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