[PLUG] SSH session hangs over WiMAX

[Larry Brigman]

On Mon, Jan 19, 2009 at 11:54 AM, Jeff_W <jgw at tx0.org> wrote:
> (3rd attempt at posting this; guess mailman is picky)
>
> I recently opted to try Clear.com's WiMAX Home service [1] as a replacement
> for DSL.  The Home service consists of a Motorola CPEi150 [2] bridge(?)
> device that connects the Clear's WiMAX transmitter and does NAT and DHCP
> and some basic firewalling.  It's a dynamically assigned IP unless one
> shells out an extra $10/month for a static IP.
>
> Anyways, while basic web surfing seems to work fine, ssh sessions are
> either disconnecting or just hanging frequently, usually within 5-10
> minutes.  Doesn't seem to matter if I'm actively typing or just running
> something like top(1).  I tried adding ServerAliveInterval <sec> with
> various time intervals (180, 240, 300) to my ssh_config file without much
> improvement.  It's pretty annoying and I'm almost to the point of boxing
> it up.  Anyone have any insight as to what might be the problem?  An online
> chat with Clear's support service wasn't particularly enlightening; the
> tech thought perhaps packet splitting might be the cause.  My NIC is
> currently set at MTU=1500 - pretty standard I think.
>
> I'm about 5 days into the 7 day evaluation period, after which I'm locked
> into Clear's two year WiMAX contract, so any timely feedback would be
> greatly appreciated.  Off-list replies are encouraged as I'm subscribed
> to the list's digest.
>

Is the dhcp lease very short and your IP address changing over the course of
the ssh session?