Re: MAC/IP trace

To add what Marc suggested.

First Ping the IP 10.x.4.z, then run the #sho ip arp | i 10.x.4.z, this
will show you the Arp entry for that specific host .

Next, follow up with the #sho ip arp | i .m.m.m.m, where m.m.m.m is the mac
address.

Followed by #show cdp nei on the specified port from the above command to
the switch where the host is located.

On each switch along the path use the #sho mac add dynamic | i m.m.m.m, the
MAC will either show up on the uplink to a neighbor switch or on one of the
switchports where your end host is located.

MS

On Mon, Aug 4, 2014 at 8:26 AM, Jeremy G <jbgarver_at_gmail.com> wrote:

> Look on the DHCP server. Assuming that the workstations are DHCP.
>
>
> On Mon, Aug 4, 2014 at 3:17 AM, Israel Ogongo <ohio38jr_at_gmail.com> wrote:
>
> > On the layer 3 device and provided it is Cisco?
> > do:
> >
> > #show ip arp | i abcd (where abcd is the last four details of the PC mac
> > address)
> >
> > Good luck.
> >
> >
> > On Fri, Aug 1, 2014 at 8:28 PM, Cisco Fanatic <ebay_products_at_hotmail.com
> >
> > wrote:
> >
> > > I am not sure as how to go about doing this.
> > >
> > > I have 5 switches in the network with 200+ workstations.
> > > These workstations are in VLAN 4 which is VLAN on all the switches
> > > (transparent mode).
> > >
> > > I have the MAC address of the workstation. How can I find the IP or
> name
> > of
> > > the computer.
> > >
> > > The problem is that the switches are in 10.x.y.0/16 range. So, even if
> I
> > > know
> > > the ip 10.x.4.z I don't know which switch/switch port it is connected
> to.
> > > Any
> > > way to tackle this?
> > >
> > > Yuri
> > >
> > >
> > > Blogs and organic groups at http://www.ccie.net
> > >
> > > _______________________________________________________________________
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> >
> >
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> >
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>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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Received on Mon Aug 04 2014 - 10:15:52 ART