From: Manny Gonzalez (manny@xxxxxxx)
Date: Mon Apr 08 2002 - 01:15:35 GMT-3
This is from the Cisco Website... the best resource for SAP filters in
my opinion:
Filtering Systems Network Architecture (SNA)
IBM's SNA traffic uses Saps ranging from 0x00 to 0xFF. Virtual
telecommunications access
method (VTAM) V3R4 and higher supports a SAP value range of 4 to 252 (or
0x04 to 0xFC in
hexadecimal representation), where 0xF0 is reserved for NetBIOS traffic.
Saps must be multiples
of 0x04 beginning with 0x04. The following ACL permits the most common
SNA Saps and denies
the rest (considering there is an implicit "deny all" at the end of each
ACL):
access-list 200 permit 0x0000 0x0D0D
When reading the ACL, first convert destination Saps (DSAPs), source
Saps (SSAPs), and wildcard masks to binary representation:
The article is best read entirely. It can be found at:
http://www.cisco.com/warp/public/698/acl200.html#caseA
Watch out for wrap.
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