Re: way of figuring out total number of retransmitted packets on a TCP socket?

["David S. Miller" <davem@xxxxxxxxxxxxx>]

On Thu, 21 Oct 2004 01:44:23 +0200
Lennert Buytenhek <buytenh@xxxxxxxxxxxxxx> wrote:

> My application is a large-ish streaming video and file download service,
> where I want to be able to automatically report on netblocks that are
> seeing unusual packet loss, and then use that data to alert our NOC
> and subsequently kick my transit providers with.

Isn't this what RSVP is for?  I realize that you may not be in
a position to use RSVP end-to-end as necessary, but watching for
retransmits by hand seems like simply a hackish way to do RSVP.

Furthermore, non-timeout based retransmits are actually normal even
on local subnets when a gigabit switch drops a packet to prevent
internal deadlocks and stuff like that.  I've seen this quite a bit.