From: Ivan (ivan@iip.net)
Date: Sat Feb 24 2007 - 08:43:53 ART
ethertype STP 0x4242
PVST+ used LLC SNAP ethernet encapsulation
permit any any lsap 0xAAAA 0x0
(there is no way to extract OUI/Type from SNAP)
list LSAP - http://www.cisco.com/warp/public/473/111_12.html
On Saturday 24 February 2007 09:13, Scott Morris wrote:
> I think you're more after a SAP field at that point from what I'm
> remembering... DSAP of 0x42 should indicate a BPDU. I think the SSAP is
> the same within the LLC header.
>
> If you have a switch and Ethereal/Wireshark sniffer lying around, you can
> verify this.
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
> #153, CISSP, et al.
> CCSI/JNCI-M/JNCI-J
> IPexpert VP - Curriculum Development
> IPexpert Sr. Technical Instructor
> smorris@ipexpert.com
> http://www.ipexpert.com
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> johngibson1541@yahoo.com
> Sent: Saturday, February 24, 2007 12:26 AM
> To: ccielab@groupstudy.com
> Subject: Re: Re: EtherType lookup table in univercd ?
>
> Thanks Sean. IP, IPv6, ARP are all there.
>
> I am still looking for BPDU's Ethertype.
>
>
> John
>
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-- Ivan
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