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Wireless Networks Thread, 169 broadcasting in Technical; have noticed on some of our edge swithes alot of network chatter. This got me thinking maybe somethink broadcasting. have ...
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    169 broadcasting

    have noticed on some of our edge swithes alot of network chatter.
    This got me thinking maybe somethink broadcasting.

    have used wire shark and have noticed that in a 5 second capture there was nearly 50 entries from a hp device that has 169. address and is looking for other 169 address.

    so clearly is using auto dhcp thingy.

    could this be slowing the network down, is this worrying about?

    finding it hard to trach the device down.

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    does it give you a mac address? you could load up your dhcp scope and try track it from there.

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    or change your pc to a static 169 ip address on the same range then do a ping -a on the ip address and see if it returns a hostname.

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    Quote Originally Posted by jonnykewell1 View Post
    does it give you a mac address? you could load up your dhcp scope and try track it from there.
    have looked in dhcp.
    closest mac is linked to a hp server we have running citrix.

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    got any virtual servers? Not a virtual network card or something like that?

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    yes we do have some virtual servers.

    everythink that runs on vm is working. otherwise users would be letting us know.

    Quote Originally Posted by jonnykewell1 View Post
    got any virtual servers? Not a virtual network card or something like that?

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    Many printer models use a multicast to find other printers on the network, very similar to Bonjour or UPnP. That being said it would not be using a link-local address.

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    GrumbleDook's Avatar
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    Quote Originally Posted by GoodheadDC View Post
    have looked in dhcp.
    closest mac is linked to a hp server we have running citrix.
    Have you tried MACVendorLookup.com - Mac Address OUI Vendor/Manufacturer Lookup to find the manufacturer?

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    mac_shinobi's Avatar
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    If its a HP printing device they normally do a bit of software that will scan the network and show you all the printing devices which should show you the mac addresses of each device ( assuming it can pickup the one that is getting an APIPA address ) ?

    Short of that go around and disconnect all HP devices minus your citrix server ( if they are printers or desktop pc's ) ??

    Download a demo / trial of LANView and scan your network with that, should be able to click on the mac address column and sort by mac address, then find it in that list and should hopefully help narrow down which device it is : http://www.jxdev.com/index.htm
    Last edited by mac_shinobi; 7th August 2012 at 09:26 AM.

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    cpjitservices's Avatar
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    169 ? isnt that a windows reserved address ? - is something mis-configured ? I'd download Solarwinds IP Tracker and do a scan on the subnet and see what it comes up with.

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    169 is allocated when a DHCP server cannot be found or because your DHCP scope is full. The other possibility is the subnet and gateway are incorrect also, hence why it's 'attempting' to find other devices to allocate a real IP.

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    mac_shinobi's Avatar
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    Quote Originally Posted by Michael View Post
    169 is allocated when a DHCP server cannot be found or because your DHCP scope is full. The other possibility is the subnet and gateway are incorrect also, hence why it's 'attempting' to find other devices to allocate a real IP.
    Presumably that is an APIPA --> What's APIPA?

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    Quote Originally Posted by mac_shinobi View Post
    Presumably that is an APIPA --> What's APIPA?
    Yep, that's the one

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    Does that HP server have a LOM card in it? They usually require their own IP address independent of the server. Not sure why it wouldn't be picking one up though.

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    oxide54's Avatar
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    confused me with LOM (also known as iLO to some people !)



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