Wired Networks Thread, Switch setup for laptop trolley in Technical; I'm guessing this goes in "Wired Networks"...
We've got a few Cisco Catalyst 2950's knocking about that I'm sorting for ...
30th November 2012, 11:04 AM #1
Switch setup for laptop trolley
I'm guessing this goes in "Wired Networks"...
We've got a few Cisco Catalyst 2950's knocking about that I'm sorting for our laptop trollies [2x16 laptops]
I've had to do a factory reset as no-one knows the password so I can't set them up with a new IP. Everything has seemingly gone through properly, I can connect to the web interface and when a pre-build computer is attached to one it can still access the network, albeit slowly.
However, when I try to PxE boot our laptops through the switch the port becomes "disabled" on the web interface and re-enables after a little while. The laptop itself can download the boot image perfectly fine, but is assigned an I.P from the 169.254.x.x range and then doesn't pick up the domain. [The option to manually input the domain and Windows Key is disabled.]
Is there something I've forgotten to do or is this an exercise in futility?
30th November 2012, 11:11 AM #2
Are you uni casting or multi casting (do the swithes support what you are trying to do - some of the older 2900 and 2950's didnt support multi casting.
30th November 2012, 11:16 AM #3
Erm... I suddenly feel very stupid.
I'm guessing unicasting. Purely due to the fact the laptops should only be connecting to our server to get OS files.
30th November 2012, 11:18 AM #4
Maybe the ports aren't negotiating quick enough... maybe try putting one into Portfast mode?
30th November 2012, 11:24 AM #5
What imaging software are you using? How many machines are you trying to image too?
Originally Posted by X-13
30th November 2012, 11:29 AM #6
WDS and I was only trying to build one laptop as a test to see if the switch was working properly.
Originally Posted by glennda
30th November 2012, 11:35 AM #7
Then I guess its uni-casting as i think you have to specify Multicasting in WDS.
Originally Posted by X-13
The difference between them is Uni-casting is more direct and ok for a couple of machines i.e each packet is sent to each machine receive the image
multi-casting it broadcasts the packets to the entire lan and its up to a machine to accept them if it is part of the process.
30th November 2012, 01:39 PM #8
I've had a look on the web interface and there's no option for portfast.
Originally Posted by Ric_
I can connect to it with PuTTY, but I'm not sure of what commands I need to use.
30th November 2012, 01:58 PM #9
This could be that you do not have the correct NIC driver in the install.wim image - so the boot.wim is happy, until the machine gets to the OOBE and realises there is no NIC driver. Check device manager after a failed install.
Also you could try this laptop using any other switch (that you know works) - this will tell you wether it's the switch, or the machine.
30th November 2012, 02:13 PM #10
I've imported the drivers, but it isn't allowing me to use them in a build disk [THANKS RM!]... However, it built fully [Without any serious issues] when connected to the network socket on the wall...
Originally Posted by Psymon
I also tried it on another switch. Same model, same settings... Same problem.
The port is set to auto/auto [speed/duplex respectively] which becomes 100/full when the machine is connected but off.
When turned on, it goes orange [error disabled] but comes back after a few seconds.
I may need to have a word with our LEA to see if they'll tell me which arcane spells they used to set it up last time...
30th November 2012, 03:21 PM #11
@X-13 It won't be driver related as the DHCP lease is negotiated by the PXE boot (before the OS loads). If you have no config on the switch, get up a console in enable mode and run the following:
This WILL wipe the switch config!!!!
You should then pick a port (say the first one) and again use the console for the following (assuming 100Mbps ports):
then press ctrl-z and type Cross your fingers and see if it works - it does look like the it is timing out getting a DHCP lease.
3rd December 2012, 10:15 AM #12
@Ric_ you're the best.
That worked and it's going through fine now!
Is there a way to do it for all ports or is it a case of doing each one manually?
Le EDIT: Nevermind, figured it out.
interface range fa0/1 - 23
Last edited by X-13; 3rd December 2012 at 01:13 PM.
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