Hello Craig, and others, On Mon, 2012-08-06 at 21:31 +1000, Mark Trickett wrote:
Hello Craig,
On Sun, 2012-08-05 at 23:28 +1000, Craig Sanders wrote: There was a reference to a Cisco site. I visited, and have printed so I can try to get my head around. I will need to reread several times, along with chasing more introductory material.
And still digesting.
I think Mark has mentioned problems downloading the Linux Journal before. Makes me wonder what the MTU and MRU on his PPP interface is and whether he (or Telstra) is blocking ICMP packets (in particular ICMP Fragmentation Required msgs).
Any comments about ICMP fragmentation setting would be appreciated, ie what to grep for and the like.
you need to mru and mtu values in the pppd config file for your connection. e.g. /etc/ppp/peers/provider. the exact filename depends on your distro and what method you used to configure pppd in the first place (e.g. gui config, dialog text mode config, or just a text editor) see the man page for pppd and the network configuration documentation for your distro for details.
you'll want to add lines like:
mtu 600 mru 600
Noticing changes with the MTU & MRU both set to 600, seems to be better, but that is subjective. I would appreciate comments about what metrics to look at, and how to collect.
I would also appreciate pointers to more advanced configuration. I need the modem link to be the default route, rather than any Ethernet interface.
1. don't have a gateway line in your ethernet configuration - that tells ifup that you want a default route pointing at the gateway mentioned.
2. add "defaultroute" to your ppp configuration. same place as you add the mtu and mru.
Thanks, noted, will be trying to sort out the desktop soon.
Now I need a bit more time at the keyboard, at the moment, work and trying to do things like get enough firewood to keep warm are more critical.
Will go looking soon. One promising thing, the wget invocation is running well at the moment, I have been running the traceroute command periodically. The first four tries died early, before I issued the traceroute command. I am trying this because that was the difference when I managed to get 36% on a previous session, but with only one invocation. It appears to do something to the traffic that I do not understand.
That wget invocation did work, after a fashion. I do have the entire current digital copy of Linux Journal, but the filename was mangled. I need to print the wget man page, and read carefully, several times. Why do I not need to tell wget to continue for some downloads, but do for others. There are also some strange things going on with the headers that the proffered invocation from a firefox plugin sets up. I shall have to look over and scratch my head yet again.
craig
Regards, Mark Trickett