From: Sam.MicroGate@usa.telekom.de
Date: Fri Feb 07 2003 - 11:25:53 GMT-3
This is amazing. The groupstudy is not able to reach a consensus for this
question. I tried all the combination, it did not work. You must use a
router access list or a port access list to accomplish this task.
Sam
-----Original Message-----
From: Casey, Paul (6822) [mailto:Paul.Casey@o2.com]
Sent: Thursday, February 06, 2003 7:10 PM
To: 'Evgeny Tantsura'; Cezar Fistik
Cc: ccielab@groupstudy.com
Subject: RE: RE: 3550 port security w/o L2 or L3 access-list
Peoples idea should always be valued, even theoretical.
That's how most things start, in theory.!!
I Don't think this can be achieved using just port security, since it's the
same mac-address address each time on the interface , and you are just
changing the IP address of the host,
This is an interesting requirement.
It sounds like to need to do some layer 3 filtering somehow,
You Lab requirement could be miss phrased,., or your interpreting it wrong.
Can't think how this can be achieved, though,
Kind regards.
-----Original Message-----
From: Evgeny Tantsura [mailto:ivgen@castel.nl]
Sent: 06 February 2003 23:30
To: Cezar Fistik
Cc: ccielab@groupstudy.com
Subject: Re: RE: 3550 port security w/o L2 or L3 access-list
But it doesn't work..
With arp timeout=0, with clear arp-cache and all the staff
Does anybody know a practical (not theoretical) solution to this ? Not what
you think but what you've test.
> I think, accorgding to scenario conditions, that the original solution
> is the only good one. It will work perfectly if we ony add the
> following line udner catalyst interface configuration
>
> switchport port-security maximum 1
>
> This is from cisco cofig guide:
>
> switchport port-security maximum {value}
> - (Optional) Set the maximum number of secure MAC addresses for the
> interface. The range is 1 to 128; the default is 128.
>
>
> switchport port-security mac-address {mac-address}
> - (Optional) Enter a secure MAC address for the interface. You can use
> this command to enter the maximum number of secure MAC addresses. If
> you configure fewer secure MAC addresses than the maximum, the
> remaining MAC addresses are dynamically learned.
>
>
> In combination with a static arp entry this should work.
>
> Any coments?
>
> Regards.
>
> Cezar Fistik
>
>
> ---------enyi abajue wrote:
> >Hi,
> >I am not too sure I can agree, there are three types of ACLs for the
> >3550
> viz Router (L3) ACLs, Port (L2) ACLs and Vlan access-maps and the
> requirement was not to use L3 nor L2 ACLs, where I really worry is
> whether putting the port in a separate Vlan is an issue as only flows
> with that ip address or mac address as source will be allowed in any
> direction within the vlan.
> > Sam.MicroGate@usa.telekom.de wrote:Forgot this one. The requirement
> > for
> this question is not to use an access
> >list. Vlan map needs either name mac extended access list or an
> >access
> list.
> >Therefore the vlan map solution does not meet the requirements.
> >
> >Sam
> >
> >
> >
> >
> >-----Original Message-----
> >From: Casey, Paul (6822) [mailto:Paul.Casey@o2.com]
> >Sent: Thursday, February 06, 2003 9:29 AM
> >To: 'Sam.MicroGate@usa.telekom.de'; 'cciekt@yahoo.com';
> >'ccielab@groupstudy.com'
> >Subject: RE: 3550 port security w/o L2 or L3 access-list
> >
> >
> >
> >I wonder could you use a vlan-access-map in conjunction with port
> >security
> >
> >Put port in vlax x
> >Add port security for the mac-address you want,
> >And the add a vlan-access-map for this vlan stating traffic only from
> >the particular ip address you want, This might achieve the desired
> >solution.
> >
> >Just throwing up ideas..
> >
> >-----Original Message-----
> >From: Sam.MicroGate@usa.telekom.de
> >[mailto:Sam.MicroGate@usa.telekom.de]
> >Sent: 06 February 2003 13:31
> >To: cciekt@yahoo.com; Sam.MicroGate@usa.telekom.de;
ccielab@groupstudy.com
> >Subject: RE: 3550 port security w/o L2 or L3 access-list
> >
> >
> >Any input/help from the 3550 experts out there?
> >
> >Sam
> >
> >
> >-----Original Message-----
> >From: KT Wee [mailto:cciekt@yahoo.com]
> >Sent: Thursday, February 06, 2003 8:29 AM
> >To: Sam.MicroGate@usa.telekom.de; ccielab@groupstudy.com
> >Subject: RE: 3550 port security w/o L2 or L3 access-list
> >
> >
> >
> >I clear the arp cache before changeing the ip address. Didn't help.
> >
> >
> >Sam.MicroGate@usa.telekom.de wrote:
> >
> >
> >Did you clear the arp cache before changing the IP address?
> >
> >Sam
> >
> >
> >-----Original Message-----
> >From: KT Wee [mailto:cciekt@yahoo.com]
> >Sent: Thursday, February 06, 2003 7:18 AM
> >To: ccielab@groupstudy.com
> >Subject: 3550 port security w/o L2 or L3 access-list
> >
> >
> >Hi Guys,
> >
> >Got a scenario on 3550. Only allow packet with mac-address
> >1234.1234.1234 and ip address 1.1.1.1 to access port fa0/1. Cannot
> >use L2 or L3 access list. I though of using switchport port-security
> >and arp static mapping as
> >follow:
> >
> >interface FastEthernet0/1
> >switchport mode access
> >switchport port-security
> >switchport port-security mac-address 1234.1234.1234
> >
> >arp 1.1.1.1 1234.1234.1234 ARPA
> >
> >I am able to ping to 1.1.1.1. But if I change the host to 1.1.1.2, I
> >am still able to ping to 1.1.1.2. This would go against the condition
> >only the host with 1.1.1.1 is allowed. I saw some thread similar
> >before but can't find anything in archive. Please help thanks.
> >
> >
> >
> >Regards
> >
> >
> >
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With kind regards/ met vriendelijke groeten,
------------------------------------------------
E. Tantsura
Network Developer
Essent Kabelcom N.V.
Dr.van Deenweg 84
8025BN Zwolle, The Netherlands
Tel: +31-(0)38-850-7642
Fax: +31-(0)38-850-7410
Mob: +31-(0)6-290-80458
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