[c-nsp] Performance Degradation Using VLANs

Rodney Dunn rodunn at cisco.com
Wed Nov 17 19:19:04 EST 2004


The performance hit would be very very little.

That's because the mac header rewrite is prebuilt
by CEF to include the vlan/dmac/smac information
and it's preprened just like if the vlan isn't
there.

You would have to test it to get exact numbers but
I've never seen anyone mention a difference in
the software forwarding path when adding subinterfaces
as a trunk that map to vlans.

Rodney

On Wed, Nov 17, 2004 at 05:03:40PM -0500, Mario Antonio wrote:
> Brian,
> 
> The router will be connected to a switch (Vlan Trunk)
> Customers will be connected via a radio which is connected to the switch
> (vlan trunk)
> 
> Regards
> 
> Mario Antonio
> 
> 
> ---
> [This e-mail was scanned for viruses by Webjogger's AntiVirus Protection System]
> 
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