From: boby2kusa@hotmail.com
Date: Mon Jul 07 2003 - 17:03:54 GMT-3
if it's configured to learn it dynamically then it will be the first one it
learns. Having the port connected to a router will cause it to learn only
that router's mac address unless the router's ethernet interface is bridging
with another one of it's interfaces.
----- Original Message -----
From: <Danny.Andaluz@triaton-na.com>
To: <matijevi@bellsouth.net>; <john.humphrey@txkisd.net>
Cc: <ccielab@groupstudy.com>
Sent: Monday, July 07, 2003 12:57 PM
Subject: RE: port-security 3550
> I was wondering how the switch decides what that 1 MAC address will be. I
> think it's the first one it sees on the interface. How else would it know
> what to allow if you don't specify a MAC address?
>
> Danny
>
> -----Original Message-----
> From: John Matijevic [mailto:matijevi@bellsouth.net]
> Sent: Monday, July 07, 2003 3:51 PM
> To: John Humphrey; Andaluz, Danilo, Triaton/NA
> Cc: ccielab@groupstudy.com
> Subject: Re: port-security 3550
>
>
> Hello,
> It looks like from your scenerio that you could use either protect or
> restrict. And you will need port-security maximum 1 command to limit to
one
> mac-address. Sincerely, Matijevic
> ----- Original Message -----
> From: "John Humphrey" <john.humphrey@txkisd.net>
> To: <Danny.Andaluz@triaton-na.com>
> Cc: <ccielab@groupstudy.com>
> Sent: Monday, July 07, 2003 3:38 PM
> Subject: Re: port-security 3550
>
>
> > I think you need the following commands per DocCD. Check out this url
> > as a reference:
> > http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12113ea1/355
> > 0scg
> > /swtrafc.htm#1038546
> >
> > int f0/x
> > switchport port-security maximum 1 --> sets maximum # of learned MAC
> > to 1 switchport port-security mac-address xxxx.xxxx.xxxx --> R7's MAC
> >
> > This scenario would probably warrant the "switchport port-security
> > violation restrict" or "switchport port-security violation protect".
> > It just depends on whether or not you want an SNMP trap sent or not.
> >
> > Hope this helps.
> >
> > > Hello, Group. Quick question on port security.
> > >
> > > interface FastEthernet0/7
> > > switchport port-security violation protect
> > >
> > > r7---cat3550
> > >
> > > Will the above config allow the port to only learn r7's MAC and none
> > > other? Here's the requirement:
> > >
> > > Configure the port attached to R7 to only learn 1 MAC address. If
> > > other devices are connected to this port, it should not be shut
> > > down, but rather deny any communications from these new MAC's.
> > >
> > > I think the "protect" keyword prevents the port from being shutdown.
> > > I'm confused about the part where it only learns R7's MAC. If
> > > another device connects to this port, how does the switch know it's
> > > not R7. I'm guessing it's dynamic, but is the above all that is
> > > needed as far as configurations on the cat interface? Shouldn't the
> > > command "switchport port-security" be added as well? I was looking
> > > at the Doc CD, but it's not clear. I'm finding conflicting info.
> > >
> > > Thanks,
> > > Danny
> > >
> > >
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