From: Joe Chang (changjoe@earthlink.net)
Date: Tue May 27 2003 - 16:28:31 GMT-3
DSAPs and SSAPs in binary:
00
04 = 0000 0100
08 = 0000 1000
0B = 0000 1011
The mask:
0C = 0000 1100
would match 00 , 04 , 08 , 0C, which misses 0B.
----- Original Message -----
From: "lg01" <lg01@myway.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, May 27, 2003 4:01 AM
Subject: Filtering SNA
> Hello group,
>
> If anyone can shed some lights on this, that would be greatly appreciated.
>
> In an exercise, it asked me to only allow SNA traffic from RTA. And it
said that the SNA ports used will be 00, 04, 08 & 0B.
>
> But somehow... the answwer config gives:
>
> access-list 200 permit 0x0000 0x0C0C
>
> But I don't understand how they dervie / calculate this ACL.
>
> Thanks.
>
> H.
>
>
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