From: Sasa Milic (smilic@xxxxxxxx)
Date: Sun Jan 06 2002 - 18:35:45 GMT-3
Hi Omar,
even number is used for source SAP in commands. In responses,
it is odd number. Take a look at 802.2 standard at IEEE web
site; lsb in SSAP is C/R bit, lsb in DSAP is I/G (individual/group)
bit. DSAP is even number for individual SAPs, odd for group.
Does anyone know example for group DSAP ? When/how it is used
in SNA ?
Sasa
omar guarisco wrote:
>
> Hi Sasa
>
> As far as I know... DSAP are always even number, as you said, ...and SSAP
> are only odd number.
>
> I've never heard that even number can be used for source SAP... isn't it
> ???....
>
> Using 0x0001 mask instead of 0x0101 won't cause you to change your
> access-list from
>
> access-list 200 permit 0xF0F0 0x0101
> access-list 200 deny 0x000 0xFFFF
>
> to
>
> access-list 200 permit 0xF1F0 0x0001
> access-list 200 deny 0x000 0xFFFF
>
> Omar
> >
> >There are examples on CCO that use 0x0101 as mask, but there are
> >also examples that use only 0x0001. I would say that 0x0001 is
> >correct, since destinating SAP will always be even number, but
> >source can be both even and odd number, so you have to mask lsb
> >with 0x0001.
> >
> >Sasa
> >
> >
> >CCIE Study wrote:
> > >
> > > It's finally that time. I'm sitting in a hotel in RTP and counting the
> > > minutes until tomorrow morning. It's time for last minute review, and
> >for a
> > > few last minute questions.
> > >
> > > I think the CCIE practical studies book is wrong about SNA filters. I
> >think
> > > they are:
> > >
> > > SNA: 0x0000 0x0D0D
> > > IPX: 0xE0E0 0x0101
> > > NetBIOS: 0xF0F0 0x0101
> > >
> > > Correct?
> > >
> > > Now, DLSw+ icanreach.
> > >
> > > If you say, 'dlsw icanreach saps F0', do you also have to say 'dlsw
> > > icanreach saps F1' ? Same for E0 & E1?
> > >
> > > Also, how are you supposed to know where to put your filters? When do
> >you
> > > put the filter on the DLSw statement, and when do you put them on the
> >token
> > > interface?
> > >
> > > Other than that, I feel good. This is my first (and hopefully only)
> > > attempt. I'd like to thank all the people who have contributed to the
> > > group, it's been a great resource.
> > >
> > > Wish me luck.
> > >
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