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Can we restrict output to an interface using MAC filter on Cisco Catalyst 2950

Posted on 2006-11-24
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Last Modified: 2008-02-01
Using switchport port-security we can restrict input to an interface.
I would like to restrict output to an interface. Is that possible?
In fact I have a device connected to the switch interface and I want the device to receive packets from only 2 PCs, nothing else.
This is important to me because the device is being flooded with irrelevant packets and that is affecting its performance.
Thanks in advance for the help.
Regards,
Brian.
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Question by:brianvanschellebeck
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lrmoore earned 125 total points
ID: 18007233
Unfortunately, not on a 2950.
VLAN's might be an option for you. Put these 2 PC's and this one host in their own VLAN. You might need some L3 device to allow these 2 PC's to connect to everything else at the same time. Cisco does have a concept of Private VLANS that would do what you need, but is only supported on higher-end switches and not the 2950.
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by:Don Johnston
Don Johnston earned 125 total points
ID: 18007344
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by:brianvanschellebeck
ID: 18007823
Can I still do it with VLAN if the two PCs are not directly connected to that switch?
In fact the twp PCs are connected to another 2950 and the two switches are connected together.
Thanks for advising.
Regards,
Brian.
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LVL 79

Expert Comment

by:lrmoore
ID: 18008001
Yes, you can use VLAN's as long as the two switches are connected by a trunk port and one is set to VTP server and one is VTP client or transparent.

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Expert Comment

by:btassure
ID: 18077655
Do you know if you have an enhanced or a standard image on the 2950s?

If it is enhanced you can use an ACL to block access to one ip from several for example. The 2 or 3 workstations that need access would need to be on static IPs for it to work though.
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Expert Comment

by:lrmoore
ID: 18107868
Are you still working on this? Can you close out this question before the cleanup crew gets around to it?
Thanks!
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