Re: Traffic On switch without mac-address on mac-address table

Hope this is not a production network ... ;-)

Mark, is this a L3 port? My guess is that it is ... If possible, ping the
fw from the switch and then check the arp table via the show ip arp
command.

If your switch does not have a way to ping the FW, and IF IT IS a production
network, then don't change a thing on the switch. ;-) ... lol

Ping the FW interface from another device and you will be able to see the
MAC add. HTH,

Andrew

On Mon, Sep 14, 2009 at 9:02 AM, Iwan Hoogendoorn <iwan_at_ipexpert.com> wrote:

> Hi,
>
> What will happen if you plug a laptop in the same switchport you have
> the firewall on and you do a show mac-address-table on the switch?
>
>
> --
> Regards,
>
> Iwan Hoogendoorn
> CCIE #13084 (R&S / Security / SP)
> Sr. Support Engineer IPexpert, Inc.
> URL: http://www.IPexpert.com
>
>
> On Mon, Sep 14, 2009 at 11:15 AM, Mark Stephanus Chandra
> <mark.chandra_at_gmail.com> wrote:
> > Dear GS,
> >
> >
> >
> >
> >
> > Have you guys ever experienced that you found traffic in one of your
> > switchport but there is no mac-address destinate on it.
> >
> >
> >
> > It happens on my switch , one of the switchport facing to a standby
> firewall
> > keep generate traffic, but actually there is no mac-address learn via
> that
> > port.
> >
> >
> >
> > The firewall is netscreen, have any idea what is the possible explanation
> of
> > this problem ?
> >
> >
> >
> >
> >
> > Regards
> >
> > Mark Stephanus Chandra - CCIE#23887
> > IT Consultant
> >
> >
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-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net