From: John Gibson (johngibson1541@yahoo.com)
Date: Wed May 16 2007 - 15:52:43 ART
Since private VLAN's doc says SVI only carries the
primary VLAN, There is no such thing as taking QOS
action on the isloated or community VLAN's frames
in the SVI. To do that we have to disable SVI.
But without SVI there is no such thing as Vlan-based
QOS in 3560.
However, if SVI is not needed in a particular network,
without SVI, 3550 can still per-port-per-vlan QOS thus
discriminating traffic with respect to VLAN. That
needs to be done one port at a time. Administrative
overhead, but works. But this can't be done in 3560
at all. Because 3560 does not have "match vlan".
> John Gibson wrote:
> > Guess this is the solution for now. 3560's QOS
> says
> > "You can configure a hierarchical policy map only
> on
> > the primary VLAN of a private VLAN."
> >
> > 3550 lets us restrict QOS action to whichever VLAN
> we
> > want to specify, right ?
> >
> John,
>
> Another way of looking at this, however, is to say
> that the 3550 does
> not let us apply QoS to VLANs at all, only to ports.
> Whereas the 3560
> DOES let us apply QoS to vlans, via the SVI
> interface.
>
> Granted that PER PORT, the 3550 makes it easier to
> match traffic on a
> particular vlan.
>
>
> --
> Hth,
>
> Bob Sinclair CCIE 10427 CCSI 30427
> www.netmasterclass.net
>
This archive was generated by hypermail 2.1.4 : Fri Jun 01 2007 - 06:55:21 ART