nanog mailing list archives
Re: Verizon EVDO Issues
From: Daniel Senie <dts () senie com>
Date: Thu, 9 Apr 2009 10:31:10 -0400
On Apr 9, 2009, at 7:15 AM, Robert E. Seastrom wrote:
Seth Mattinen <sethm () rollernet us> writes:I have a few Sprint EVDO cards. They go into standby when nothing isactively going on and fire up within seconds when there is something to do. I regularly use everything from SSH to streaming video without any issues. I only notice the delay with SSH when I don't type anything for a few minutes and it has to come active again, but I can leave it idlefor hours and it never drops.Interesting. When I got my Sprint EVDO card (u727) a year and a half ago, they were pretty nasty about gunning down (bidirectional spoofed RST coming out of the middle of the network somewhere) any TCP sessions that were idle for ten minutes or more.
We observe this same kind of behavior with firewalls in the path watching for dead sessions they can clean up. Appears they send RSTs to both end points when they decide a session has gone away, as that'll let end hosts figure it out sooner. Same workaround of turning on keep=alives once a minute solves this too. The behavior in the case of firewalls makes sense, as state tables have to be cleaned up eventually.
Current thread:
- Verizon EVDO Issues Charles Wyble (Apr 07)
- Re: Verizon EVDO Issues Charles Wyble (Apr 08)
- <Possible follow-ups>
- Re: Verizon EVDO Issues Alexander Harrowell (Apr 08)
- Re: Verizon EVDO Issues Nathan Ward (Apr 08)
- Equinix contact Fouant, Stefan (Apr 08)
- Re: Equinix contact Niels Bakker (Apr 08)
- RE: Equinix contact Fouant, Stefan (Apr 08)
- Re: Verizon EVDO Issues Seth Mattinen (Apr 08)
- Re: Verizon EVDO Issues Robert E. Seastrom (Apr 09)
- Re: Verizon EVDO Issues Daniel Senie (Apr 09)
- Re: Verizon EVDO Issues Robert E. Seastrom (Apr 09)
- Re: Verizon EVDO Issues Joe Provo (Apr 09)
- Re: Verizon EVDO Issues Steven M. Bellovin (Apr 09)
- Re: Verizon EVDO Issues Robert E. Seastrom (Apr 09)
- Re: Verizon EVDO Issues Steven M. Bellovin (Apr 09)
- Re: Verizon EVDO Issues Robert E. Seastrom (Apr 09)