SNAC and legacy machines

[Aaron]

Snac only comes into play when a one of the c2k machiens antivirus is slightly out of date but unless these machines are linked into the c2k network through a c2k switch then it shouldnt have anything to do with snac.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

[Paul]

no work, i wonder if this is related to my recent post.

[Paul]

 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?

[Aaron]

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.

[Aaron]

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?

[Si]

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.   

[Paul]

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.

[Aaron]

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.

[Si]

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.

[Paul]

ur a lengend si

[Aaron]

you are legend si good man cheers lol

no worries ill stick to just working on my on legacy network next time cheers guys

[Aaron]

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.

[Aaron]

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.

[Si]

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.

[Stephen]

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.