From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Sat Nov 15 2003 - 21:52:04 GMT-3
Michael,
As a side note, setting IP precedence on a local POTS peer is no
longer supported. However you can still set it using the appropriate
DSCP -> IP Prec mappings. Since DSCP implicitly overlaps IP precedence,
DSCP is the preferred way to color traffic.
Router(config-dial-peer)#ip prec?
% Unrecognized command
Router(config-dial-peer)#ip qos dscp ?
<0-63> DSCP value
af11 Sets DSCP to assured forwarding (af11) bit pattern 001010
af12 Sets DSCP to assured forwarding (af12) bit pattern 001100
af13 Sets DSCP to assured forwarding (af13) bit pattern 001110
af21 Sets DSCP to assured forwarding (af21) bit pattern 010010
af22 Sets DSCP to assured forwarding (af22) bit pattern 010100
af23 Sets DSCP to assured forwarding (af23) bit pattern 010110
af31 Sets DSCP to assured forwarding (af31) bit pattern 011010
af32 Sets DSCP to assured forwarding (af32) bit pattern 011100
af33 Sets DSCP to assured forwarding (af33) bit pattern 011110
af41 Sets DSCP to assured forwarding (af41) bit pattern 100010
af42 Sets DSCP to assured forwarding (af42) bit pattern 100100
af43 Sets DSCP to assured forwarding (af43) bit pattern 100110
cs1 Sets DSCP to class selector codepoint 1 (precedence 1)
cs2 Sets DSCP to class selector codepoint 2 (precedence 2)
cs3 Sets DSCP to class selector codepoint 3 (precedence 3)
cs4 Sets DSCP to class selector codepoint 4 (precedence 4)
cs5 Sets DSCP to class selector codepoint 5 (precedence 5)
cs6 Sets DSCP to class selector codepoint 6 (precedence 6)
cs7 Sets DSCP to class selector codepoint 7 (precedence 7)
default Sets DSCP to default bit pattern of 000000
ef Sets DSCP to expedited forwarding bit pattern 101110
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 708-362-1418 (Outside the US and Canada)
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Michael Snyder
> Sent: Saturday, November 15, 2003 9:14 AM
> To: ccielab@groupstudy.com
> Cc: 'Donny MATEO'
> Subject: RE: Does Precedence 5 always equal DCSP CS5?
>
> Hold on,
>
> DCSP CS5 doesn't equal DCSP EF
>
> Assuming the TOS bits are zero, Precedence 5 should equal DCSP 40.
>
> Using TOS, maybe you could get to EF(46).
>
> I've never played with the TOS bits.
>
> -----Original Message-----
> From: Donny MATEO [mailto:donny.mateo@sg.ca-indosuez.com]
> Sent: Saturday, November 15, 2003 10:34 AM
> To: Michael Snyder
> Cc: ccielab@groupstudy.com; nobody@groupstudy.com
> Subject: Re: Does Precedence 5 always equal DCSP CS5?
>
> I seem to remember that DSCP is has another 3 bits addition to the ip
> precedence bits.
> Those 3 bits are the factor determining the drop
preference....(actually
>
> only 2 is used if I recall correctly). So yeah precedence 5 (EF), but
> what
> kind of drop characteristic ?...... I'm not sure if the implementation
> on
> IOS QOS coding actually take heed of those extra bits in DSCP, but who
> knows.
>
> Donny
>
>
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