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How can I filter 802.3 frame on Catalyst 3550 EMI ?

How can I filter 802.3 frame on Catalyst 3550 EMI ? The documentation says

filtering is possible only for Ethernet II or SNAP

http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12111ea1/3550scg/swacl.htm#xtocid25

But I'd discovered that IPX, STP and some other protocols uses 802.3.

3 REPLIES
New Member

Re: How can I filter 802.3 frame on Catalyst 3550 EMI ?

Yes IPX can use 802.3, but it can also use 802.2 and Ethertype_II. Netware 3.11 and lower defaults (but you can change this) to 802.3 and Netware 3.12 - 4.x defaults to 802.2. Netware 5 and up defaults to IP. If you MUST use IPX, then you should change your frame type to 802.2. If your not sure what frame type your novell servers are running, issue the "config" command from the server console. I've never heard of any problems with STP when filtering 802.3, as STP won't traverse a router, you should be ok there too. Are you trying to filter 802.3 on individual switch ports?

New Member

Re: How can I filter 802.3 frame on Catalyst 3550 EMI ?

The Netware servers not belong to my company, but uses common Ethernet

network, so I can't do anything to configure them. All I can do is to filter IPX

frames. But 3550 can't...

New Member

Re: How can I filter 802.3 frame on Catalyst 3550 EMI ?

maybe you can set up access lists to filter ipx for all except the servers...

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