[rescue] What is this traffic?

Sandwich Maker adh at an.bradford.ma.us
Thu Oct 29 10:13:29 CDT 2015

" From: microcode at zoho.com
" On Thu, Oct 29, 2015 at 02:19:19PM +0000, microcode at zoho.com wrote:
" > On Thu, Oct 29, 2015 at 01:25:54PM +0100, Jonathan Katz wrote:
" > > On Thu, Oct 29, 2015 at 1:24 PM,  <microcode at zoho.com> wrote:
" > > > The light goes crazy whenever the switch is connected to the router. I have
" > > > not seen anything that gives me any clues apart from that. The light is
" > > > flashing at a high rate all the time, regardless of traffic from any of the
" > > > boxes on my network.
" > > 
" > > What happens when you plug a system directly into the ADSL router?
" > 
" > It's been a while since I did that. I could do that but I am not sure what
" > we would learn from it since the router is not showing any unusual
" > traffic. Only the light on the switch port from the router is going
" > wild.
" To be (hopefully) a little clearer: only the light on the switch, for the
" port where the router is plugged into the switch, is flashing at a high
" rate. The router WAN/LAN port lights behave normally based on idle, usage,
" etc. There is no indication of high activity on the router itself, nor on
" boxes connected to the switch.

[to further clarify: the local ethernet port lights on the adsl router
- the other end of the switch cable - are quiet?]

but if you unplug the switch and plug a computer directly into the
router you could have one of two outcomes:
1. the computer gets buried with this spurious 'traffic' from the
   router, and the switch is not the problem.
2. the computer internet connection flies at your full 15Mb/s with no
   hitches, suggesting the switch is the cause.

can your isp remotely upgrade your router?  perhaps they've changed a
setting and it's no longer replying properly to some housekeeping
message from the switch [keepalive?], causing the switch to go
ballistic.  perhaps it *is* responding, in a way that it shouldn't.
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought

More information about the rescue mailing list