C2k Help
Non-C2k Issues => Legacy Networks => Topic started by: Paul on October 04, 2010, 12:30:00 PM
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ok guys
i have 4 legacy machines outside in a mobile with 2 c2k machines
i cant get any of the legacy machines to log on.
would this be anything t o do with Snac? can it effect legacy machines
thankyou
paul
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are the legacy machines connected to a c2k switch?
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no their connected to a legacy switch, but all where working until snac was deployed, they are connected to the same patch panel as the c2k machines.
light is showing on the switch, but not on the machines
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it wouldn't have anything to do with snac i believe.
have you changed any settings on the switch.
Maybe test the cables.
check the Lan Drivers.
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what cable to i test?
im lost.
help please
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check the cables connected directly to the pc's and also check the cables connected to the switch, possibly try rebooting the switch as well
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Check that no one has turned the switch off and make sure the lights are on where the patch leads connect into the machines. It sounds like the legacy machines are not seeing your server. Try pinging them from another network station.
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How many switches do you have? are the links between switches ok?
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This is going to soundlike I'm talking to a teacher but have you turned the switch off and on again. I've had occasion were we're had a dip in the power in the school, not enough to turn the switches off completely, but enough to cause problems. Turning them off and on again just reset them and they worked OK after that.
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i have reset it a few times i thought it was the tx convertor that was faulty.
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is it onboard network? or a pci card.
i found that in some of my older machines even know the activity lights were on and seemed to be working the onboard network had actually stopped working couldnt get them to connect until i put a pci network card in and they worked fine.
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there the old rm blue machines
onboard nic.
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i would really try installing a new network card just out of interest if you have on laying about.
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i cannot see all 5 machines havving faulty nics, these machines where working before the summer.
has anyone kept any old rm machines? i still think its snac.
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but unless these legacy machines are linked to c2k how could snac stop them from getting access to your legacy server?
has any work been carried out were the computers are building work or anything?
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Snac only comes into play when a one of the c2k machiens antivirus is slightly out of date but unless these machines are linked into the c2k network through a c2k switch then it shouldnt have anything to do with snac.
have you tried taking a laptop and plugging it directly into the switch which the computers are connected to an seeing if you can get access to the legacy network that way? may be a faulty switch. or tried using one of the cables from the computers and put it into a laptop or another computer see if it gets access?
also try repairing the computer network connection you should still be able to log in locally to the computer change it from your domain to the computer and log in as administrator and repair the network connection
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no work, i wonder if this is related to my recent post.
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unless these machines are linked into the c2k network through a c2k switch then it shouldnt have anything to do with snac.
this might aound abit fundamental but would that include the patch panel?
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your computers link into a patch panel then back to the cabinet and from the cabinet you link you corresponding panel number into what ever switch c2k or legacy so if your patch panel is 05/04/10 and you go to the cabinet and link 04/10 into a legacy switch or a c2k switch depending on which network you want.
If you have a mixture or c2k and legacy all on the patch panel it wont matter because you determin the link back at the cabinet.
From your recent post i worked in a school before that did exactly the same thing it turned out to be a build up of static and once the computer was unplugged all cables removed everything and left for a few mins and plugged in again it worked first time. Its possible that could be an issue as well just a build up of static try taking all the cables out (everyone) press the power button a few times and then plug everything back in again.
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did you try taking a laptop out to were the switch is and linking directly into it and see if you can get access to your legacy server?
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I have a similar problem here.
Any legacy machine that runs off our Cab 2 can't get internet access. I've tried directly plugging into the legacy switch in cab2 with no joy yet anything connected to cab 1 is fine. I asked the helpdesk if they have SNAC set up forbidding network traffic to and from that legacy switch but it was like asking them to solve world poverty.
I checked the fiber convertors and the one in Cab 2 shows an intermittent link light, so maybe its on its last legs. It hasn't been resolved by anybody yet and doesn't look like its going to be anytime soon. I hate the way our legacy network shares fibre and routers with the C2k system. :(
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thankyou Si
i knew it was something to do with snac, but wasnt sure, atleast im not going mad!!!
what would be the solution to this?
cabinet 2 is the only one that shares cabling.
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lol guys i am still lost as to how you's can think that snac install on the c2k network server can interfer with the legacy network at all this completly stomps me but good luck getting your legacy gear sorted.
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well Aaron, both networks share optic fibre so I can see very easily how the c2k network can interfere with our legacy networks. They are actually part of the same network (10.x.x.x) just on a different subnet.
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ur a lengend si 8)
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you are legend si good man cheers lol
no worries ill stick to just working on my on legacy network next time cheers guys
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here we seem to have seperate fibre links for legacy and also for c2k to link the cabinets together 2 fibre connections per cabinet seperating completley are c2k from our legacy only linked through the router other than that our legacy switches have a fibre link back to the main cabinet and the c2k switches have a seperate fibre link back to the main cabinet.
but sure everything is working for me with snac enabled/disabled doesnt really matter but i would be interested to hear if c2k come back to you saying that snac was the problem that it had disabled traffic one your legacy switch.
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i would have though that being part of the same network just different subnet would still be a security risk for c2k and that c2k beign able to stop traffic on our legacy switchs would be another big security problem.
c2k would always run there network on a seperate fibre link from the legacy it would cause to many problems at their end if legacy was run on the same link. There would be no way they could see traffic on our legacy switches we share yes there internet but that is through a seperate connection to their router which is the only shared connection between legacy and c2k.
but if your schools are setup completly different that for unknown reason both of you seem to share the same fibre links as c2k then i completly appologise but to be honest i think you need to check this first because it was my understanding that c2k would take nothing to do with legacy and never wanted it connected to their network in the first place.
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Well, Im not saying that SNAC is definitely the issue in my school. As I said, the Ethernet/Fibre converter in our cab2 doesn't seem to be getting a solid link so it could well be that at fault. But we certainly do have fibre that is shared which is logically partitioned on the switches.
Anyone that has a legacy network that uses those c2k routers will have an IP address and subnet settings set by them so therefore that legacy network could be affected by anything c2k/northgate/HP do. Paul and myself both got these issues when SNAC was turned on, so I guess its human nature to think the two are connected. I'll let you know what happens here anyway, whenever (if at all) the issue is solved.
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What share a fibre optic?? I think you are mistaken as then you would have to share switches with c2k and I dont see that as being allowed.
C2k rules are that there is a spare fibre run to every cab in case the fibre run they use falls over. You should be using the spare run with your switches, you cannot share a fibre back to c2k fibre switches that would mean you would have to use normal c2k switches as well to plug your legacy equipment into.
So basically you should have 2 seperate networks in parallel.
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I thought what i was saying was complete nonsense i knew that we would run seperate fibre links for c2k and legacy.
but if your cabinet 2 is not getting access to the internet does this then affect your c2k computers it may just be the fibre link for your legacy switch which is the problem.
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Actually Stephen, we do indeed have a switch that has half its ports as c2k and half its ports as legacy and shares fibre from its cab back to cab1. Maybe not common procedure, but you can come take a look if you want and see for yourself if you don't believe me.
And yes, Aaron it could well be the fibre link being the problem here and its what I originally thought and pretty much still do. But if SNAC can block network access by port or by switch, surely they could block a legacy switch which, after all, is simply another subnet of the c2k WAN? Its just supposition of course, but it's bound to be possible in theory.
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Actually Stephen, we do indeed have a switch that has half its ports as c2k and half its ports as legacy and shares fibre from its cab back to cab1. Maybe not common procedure, but you can come take a look if you want and see for yourself if you don't believe me.
And yes, Aaron it could well be the fibre link being the problem here and its what I originally thought and pretty much still do. But if SNAC can block network access by port or by switch, surely they could block a legacy switch which, after all, is simply another subnet of the c2k WAN? Its just supposition of course, but it's bound to be possible in theory.
Did Northgate configure the switch this way for you?
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if it is i would get straight on the phone and get it changed legacy and c2k are always ment to be kept seperate not shared in anyway. Other than the internet thats the only share we are supposed to have, also i would have thought that this woudl have cause major problems with either of the two networks if you were sharing a switch.
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Did Northgate configure the switch this way for you?
lol I did it myself. Shhhhh.
Yep they did actually. You reckon I could sell tours to view this magical thing that is both a c2k and a legacy switch?
@Aaron : The switch is partitioned logically so there is no crossover between the networks. Why should I demand it be removed?
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if you dont think that this is causing problems then leave it
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WOW Never thought C2k would let you use even part of any of their switches as a legacy!!!!!! Even though it is possible.
Is this official procedure, like could you fill in a form to get it done? I would be very interested in getting it done here maybe. Or was it done as a pilot? Or was it done under the table by a friendly northgate technician?
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It was all done above board! It was the only viable way of getting more computers on the network without ripping up tarmac (the cab in question is off the main building). They probably don't do this too much all the same. :)
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is PAUL's setup the same as yourself then SI
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Do they support it, if none of the stations worked when using that switch, but did work when using a legacy switch will they try to fix it?
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if you had a legacy switch out in the cab could you not piggy back off it onto another legacy switch instead of using a c2k switch?
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They support the c2k machines there, and yes, they would support the switch if it fell over, but thats it. Anything to do with the legacy would be my problem unless it was their switch at fault I guess.
That was the problem Aaron there was no legacy switch in that cab and the teacher there wanted his stand alones he had there to have internet access. That particular cabinet had no legacy support at that time.
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ah right no worries
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Just a quick update:
It seems like the ethernet convertor is the problem after all. Going to try to source one off Ebay if I can.
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if you need to change the switch do you think c2k will reconfig it again for you ? just if it was easier to change the switch than source the convertor
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This may seem like a dumb question but is the switch not a C2k switch, and is then the Ethernet converter not C2k as well? if so then would C2k not replace it?
Unless you are running a second (legacy) switch off the C2k one. If so could you post a pic?
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Well, the converter in question isn't actually part of the c2k/legacy switch - its in a different cabinet. This set up is more simple. The fibre terminates at a patch bay in cab2 from cab 1. Two fibre cables are patched into that and the ethernet converter. The ethernet converter plugs into port 24 of my 3Com legacy switch.
The ethernet converter isn't showing a steady link light. The same thing happened to its sister ethernet converter in Cab 1 which I was able to pin down to a faulty power supply. Could well be the same as this one, but if I can get one for ?30 (which I saw on Ebay) I don't mind buying the entire thing.
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Well, the converter in question isn't actually part of the c2k/legacy switch - its in a different cabinet. This set up is more simple. The fibre terminates at a patch bay in cab2 from cab 1. Two fibre cables are patched into that and the ethernet converter. The ethernet converter plugs into port 24 of my 3Com legacy switch.
The ethernet converter isn't showing a steady link light. The same thing happened to its sister ethernet converter in Cab 1 which I was able to pin down to a faulty power supply. Could well be the same as this one, but if I can get one for ?30 (which I saw on Ebay) I don't mind buying the entire thing.
i have a faulty ethernet convertor , that was patched into the riverbed by the geezer who installed the riverbed
is this normal?
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I guess it depends on your set-up? Did the convertor connect straight to the internet router beforehand?
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i dont know, i never looked at it. i never knew there was a convertor buried between all the cables . :)
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Has the 3com stuff not a lifetime warranty. I know the switches do. You could try ringing them and asking. On the other hand I have 3com switches here with dual fibre connectors in the back and will be throwing them out when the new switches arrive and get installed.