Home Networking Help

S

Skandalis

Senior Member
Joined
Jun 6, 2012
Messages
500
Reaction score
0
Location
Huisie by die see
Hi guys,

Network setup is as follows:

ADSL Modem + DHCP server (+ wireless clients) -> Switch -> Wired Devices

Ping results to wired devices are erratic i.e. 60% packet loss. When connecting same devices to the ports of the router, no issues.

Through extensive testing I can rule out hardware failure. Tested on multiple switches & modems of the same make & model.

Is there something I'm missing?

Modem = Asus DSL-N10E
Switch = 5port Intellinet Gigabit Switch

6 beers up for grabs for the solution :D
 
Did your extensive testing include checking the ethernet cable between the switch and DSL router?
 
Is there anything else I can look at or consider?

Is it possible the router and switch are not compatible with each other?
 
where are the network cables running and how long are they? could be interference from powerlines or it could be a crappy switch. Perhaps trying with not the "same make and model". I have never used Intellinet, anyone else?
 
Devices are next to each other. Cable length is 1m.

The switch played well with other routers.

Will try and look at the electrical setup as everything is running through a UPS.
 
Can you do a simultaneous ping to multiple devices on the switch and router and see if there's a correlation in loss
 
PsyWulf said:
Can you do a simultaneous ping to multiple devices on the switch and router and see if there's a correlation in loss
Click to expand...
All devices connected to the router return fine.
All devices from the switch onwards get these crappy ping results.

Code: 
C:\Users\User>tracert xxx.xxx.xxx.xxx

Tracing route to xxx.xxx.xxx.xxx over a maximum of 30 hops

  1     *        *        *     Request timed out.
  2     *        *        *     Request timed out.
  3     1 ms    <1 ms    <1 ms  DLINK-CCBE62 [xxx.xxx.xxx.xxx]

Trace complete.
 
When pinging devices on the switch simultaneously, I get replies at different times. If that makes any sense...

EDIT: They're actually timing out or responding more or less the same time :wtf:
 
Last edited:
How is your ip addresses looking like? You sure everyone is on a unique and different IP address i.e. no same ip address on network possibly causing clash?
 
are you running the ethernet cables through the ups as well or just power?
 
Will double-check when I'm back.

Doubtful though as static entries are defined at the router & not the devices themselves. All other devices are on dynamic IP's
 
Skandalis said:
When pinging devices on the switch simultaneously, I get replies at different times. If that makes any sense...

EDIT: They're actually timing out or responding more or less the same time :wtf:
Click to expand...

Okay,now ping from one of the devices to another device on the switch while doing the original test,any variances? Sounds like the network cable between the router and switch is not 100% or there is a feedback loop/short
 
PsyWulf said:
Okay,now ping from one of the devices to another device on the switch while doing the original test,any variances? Sounds like the network cable between the router and switch is not 100% or there is a feedback loop/short
Click to expand...
When pinging devices that are both on the switch, no issues whatsoever.

I've replaced cables between the router and the switch on numerous occasions.

Starting to think, more & more that it's the router. Just can't justify spending thousands of bucks on a router just to have it knocked out again when our thunderstorms start. Any other cheap modems/routers out there?
 
Maybe connect port 4 on router to port 1 on switch?
Maybe try with a crossover cable or if you are using crossover, try using a straight cable?
 
This sounds like a duplex/speed argument is going on between the router and the switch - I don't know your specific hardware, but is there any way to set the speed & duplex on one end ? My experience with these things is that auto/auto isn't really that reliable, especially in cases like this where (I'm assuming) the router is only 100mbps capable and the switch is 1gbps.
If you unplug everything from both the switch & router with the exception of 1 device on the switch and the link to the router, then run a ping -t xxx.xxx.xxx.xxx from the device on the switch to the router's IP, you will probably see a pattern of drops occuring at regular intervals, coinciding with the switch & router re-negotiating speed & duplex for the connection (usually every 10 seconds or so)
 
Q-Tech said:
This sounds like a duplex/speed argument is going on between the router and the switch - I don't know your specific hardware, but is there any way to set the speed & duplex on one end ? My experience with these things is that auto/auto isn't really that reliable, especially in cases like this where (I'm assuming) the router is only 100mbps capable and the switch is 1gbps.
If you unplug everything from both the switch & router with the exception of 1 device on the switch and the link to the router, then run a ping -t xxx.xxx.xxx.xxx from the device on the switch to the router's IP, you will probably see a pattern of drops occuring at regular intervals, coinciding with the switch & router re-negotiating speed & duplex for the connection (usually every 10 seconds or so)
Click to expand...
Dude...










:D
What beer do you drink & how do I get it to you? You just saved me R1 000

Thanks to all the other guys who tried to help!
 
You must log in or register to reply here.
Back
Top
Sign up to the MyBroadband newsletter
X