Jonathon Fernyhough wrote: > 2009/11/27 alan c <[email protected]>: >> Jonathon Fernyhough wrote: >>> 2009/11/26 alan c <[email protected]>: >>>> (also to ubuntu forum) >>>> >>>> Is anyone in UK using Virginmedia mobile internet dongle and yahoo or >>>> google accounts? >>>> I would be most interested to know if you see the following problems >>>> too. tia. >>>> >>>> Workaround - please see below. >>>> >>> >>> Have you tried lowering the MTU? This fixes problems on certain sites >>> for me quite often. >>> >>> e.g..: >>> $ sudo ifconfig ppp0 mtu 1400 >>> >> >> thanks >> >> what does mtu stand for? >> >> also, I am not at all clear about how ppp0 is involved with a mobile >> internet dongle, the machine (ppp0??) is self configuring for the >> dongle. This of course may be part of the problem. >> tia >> -- >> alan cocks >> Ubuntu user >> >> -- >> [email protected] >> https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk >> https://wiki.ubuntu.com/UKTeam/ >> > > MTU = Maximum Transmissible Unit. > > I'm not sure of the specifics, but it's something like: if this is set > too high the connection can't be made as the packet can't be > transmitted (though in theory it should just get fragmented). It may > be that certain web servers/routers can't handle a fragmented packet > (or it's set to deny/drop them). > > ppp0 should be the connection set up to Vodafone - using > NetworkManager with my 3 dongle ppp0 appears when I connect to the > mobile network.
Thanks again Jonathon I am feeling my way here. Question: If I change the MTU value, do you know if, if /when I change it back to its original value later, the system will properly revert to the original settings? That is, does anything irreversible happen according to MTU settings? Might be a strange question, but the laptop is not my own so I am trying to avoid doing stuff that I could not put back as it was. tia -- alan cocks Ubuntu user -- [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk https://wiki.ubuntu.com/UKTeam/
