From: Nathaly Landry (lnathaly@cisco.com)
Date: Sat Dec 06 2003 - 20:55:25 GMT-3
I found an explanantion a bit more clear!!!
http://www.cisco.com/en/US/partner/products/hw/switches/ps4916/products_
white_paper09186a008017b7ed.shtml
port block multicast-This command blocks unknown multicast forwarding to
the port.
So I would say outbound
Nat
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Soup Shi
Sent: Saturday, December 06, 2003 5:58 PM
To: ccielab@groupstudy.com
Subject: 3550 block unicast
Hi, group,
It is my first post asking questions, hope it is not too stupid. Reading
the document of 3550, I think the command 'switchport block
unicast/multicast' is to filter packets if their mac addresses are
unknow to
the switch. My question is the traffic to be blocked is outbound to the
interface or inbound?
I believe it is outbound (flooding to) from the switch itself (of course
it
comes from some other interface of the switch) to the interface. Because
I
found this command being used in the topic of 'protected port' in 3550
document.
However, I also found in some senarios, people use it to block unicast
from
the interface which makes me really confused. I tried to test it, but I
do
not know how.
Thanks a lot for your help.
Soup
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