[nsp] How many vlans will a 7206 support on GigE or FE interfaces?

[Siva Valliappan]

well the 7200 would be able to terminate that many VLANs with a faster
NPE (NPE-400/NPE-G1) for RAS type applications as you mentioned
(PPPoEoDot1Q).  for L3 routing, i don't think you will have the horsepower
to switch that many VLANs (unless they all have low traffic rates).

the 7500 limitation to a large extent is driven by the CYASIC limitations
on the RSP.  it is only capable of addressing around 2000 physical
interfaces.  so the IDB limit of the 7500 is fixed at 2000.

cheers
.siva

On Mon, 22 Sep 2003, Eric Osborne wrote:

> On Mon, Sep 22, 2003 at 11:56:42AM -0400, jlewis at lewis.org wrote:
> > On Mon, 22 Sep 2003, Turpin Mark Contr AFCA/GCF wrote:
> >
> > > > How many vlans will a 7206 support on a GigE or FE interface?
> > > >
> > > > How many vlans will the router support in aggregate ?
> > >
> > > AFAIK, Vlans consume IDBs.
> > >
> > > http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_tech_note09186a0080094322.shtml
> >
> > Can anyone explain why the 7200 platform gets 10000 IDBs in current IOS,
> > but the 7500 (capable of holding alot more interfaces) only gets 2048?
>
>
> Dennis or Siva are probably better suited to answer this, but AFAIK if
> a platform has that many IDBs it's not to handle vlans or channels,
> but dial-related ppp-terminating types of stuff, which about I do not
> know much.
>
> Also, standard cya disclaimer - just because the box can *take* 10,000
> IDBs or 2048 or 8192 doesn't necessarily mean that it will do whatever
> you want on every single subinterface.  But you knew that already,
> right? :)
>
>
>
> eric
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