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Internet Related/Filtering/Firewall Thread, No internet on specific IP range!!! in Technical; i have looked through all of my switches (Cisco sg200) and can not find the mac address anywhere.. All wireless ...
  1. #31

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    i have looked through all of my switches (Cisco sg200) and can not find the mac address anywhere.. All wireless devices are TP Link. or netgear.

  2. #32

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    Hi,

    I have performed the test as you requested and i can see that i have two different MAC addresses for my gateway router address when changing ip ranges.

    I have tried to locate this mac address, even unplugged the internet from the switch and then performed the arp -a test and i still get the default gateway ip address coming up with this odd MAC address that i cannot locate anywhere.

    I have downloaded a mac address scanner and this has given me the same results.

    any other ideas are much appreciated as I am all out now.

    My last thought is the switch. Could this be the cause of all this trouble?

  3. #33

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    Quote Originally Posted by jhammond View Post
    Hi,

    I have performed the test as you requested and i can see that i have two different MAC addresses for my gateway router address when changing ip ranges.

    I have tried to locate this mac address, even unplugged the internet from the switch and then performed the arp -a test and i still get the default gateway ip address coming up with this odd MAC address that i cannot locate anywhere.

    I have downloaded a mac address scanner and this has given me the same results.

    any other ideas are much appreciated as I am all out now.

    My last thought is the switch. Could this be the cause of all this trouble?
    possibly. Have you rebooted the switch? Sometimes their MAC tables can go screwy

  4. Thanks to SchoolsBroadband from:

    mac_shinobi (7th February 2014)

  5. #34

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    Yes. A while back I did suggest backing up your config and doing a hard reset on the switch, as you are on a flat network nothing to lose.

  6. #35

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    OK, I will backup the current config and do a hard reset on the switch on Monday evening so I don't take net network down during school hours.

    I will keep you all posted!

  7. Thanks to jhammond from:

    mac_shinobi (7th February 2014)

  8. #36

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    Quote Originally Posted by SchoolsBroadband View Post
    possibly. Have you rebooted the switch? Sometimes their MAC tables can go screwy
    By MAC Tables as in routing tables etc or what do you mean ? Just curious

  9. #37

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    I have managed to fix the issue!!!!!

    I reset the main switch to factory defaults and this did not work; however i managed to find the port from the MAC address. I chased this back around the school and it lead me to a small switch cab that i did not know about (was not mentioned on the handover or networking diagram!)

    This was the Cisco Lynksys switch. Hard rebooted and did nothing, so managed to get onto the console of the switch; low and behold this had a static ip of 192.168.1.254. I changed this and the DHCP etc then updated the firmware and tested the 192.168.1.x range.

    all is now working!!

    Thank you all for your help in resolving this!

  10. Thanks to jhammond from:

    mac_shinobi (18th February 2014)

  11. #38

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    Good work and you're more than welcome

  12. Thanks to SchoolsBroadband from:

    mac_shinobi (18th February 2014)

  13. #39

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    Quote Originally Posted by jhammond View Post
    I have managed to fix the issue!!!!!

    I reset the main switch to factory defaults and this did not work; however i managed to find the port from the MAC address. I chased this back around the school and it lead me to a small switch cab that i did not know about (was not mentioned on the handover or networking diagram!)

    This was the Cisco Lynksys switch. Hard rebooted and did nothing, so managed to get onto the console of the switch; low and behold this had a static ip of 192.168.1.254. I changed this and the DHCP etc then updated the firmware and tested the 192.168.1.x range.

    all is now working!!

    Thank you all for your help in resolving this!
    Thanks for the update / feedback, may help someone else in the future

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