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Cisco SG300 28 port managed switch question

Roadst1978
Level 1
Level 1

First off I would just like to thank anyone who can help me with this in advance.   And I would like to state that I am not very experienced with networking.  I took on this position for my company to fill the position because I am capable of learning it and our setup is not so complex that it needs a full time admin or outsourced tech support.   I am taking classes online and learning things as I go basically.  Its been fun!  Haha. 

The problem I am having seems like a very simple issue.  But I cannot find an answer for it anywhere.  I have a row of computers that are connected to a brand new SG300 28 port managed switch.  I've updated the boot code and all the firmware before mounting it and connecting everything.  I have a cat 6 line coming from the server to this switch.  Everything lights up except the source cat 6 line.  I hooked the cat 6 into a small Netgear 5 port switch and connected that to the SG300 and everything works.  I've had this problem with the last switch (unmanaged) we had as well.  The SG300 is set to automatically get an IP.  So after I hooked it up to the Netgear and it got an IP I set that as static and plugged the source line in again rebooted and still no connection.  I did not change any settings from default.  Currently the switch just needs to be a connection from the server to the stations.  Nothing fancy.  

As far as our server setup we are running Windows Server 2012 R2.  

The source line is routed through the following to the server.

Patch panel ->

Tp Link TL-SG1024 ->

Dell N2024 ->

Dell Sonicwall NSA 2600/Dell Poweredge T620

Again thank you in advance.  Hoping I can figure this out soon.  

2 Replies 2

pwwiddicombe
Level 4
Level 4

Some devices do "auto-MDIX" where the port will accept a straight cable and treat it as a crossover cable if necessary - not sure if that port on the SG300 does that or not.  See if you have a crossover cable instead of a straight cable, and that might get you the link light on.

(Or it might be that cable IS  a crossover and you need a normal "straight" cable)

I've been using straight T568B for all of our cables.  The TPlink the source cable is connected to has auto MDIX.  And the SG300 has it as well.  Would turning the SG 300 to MDIX instead of auto possibly help? If not I can just make a crossover cable instead.  I'll take a look at our patch panel, pretty sure they are all T568B as well.  Thank you for the assistance!