[VOIPSEC] VoIP Blocking Filter w/Ettercap

[Erick Bergquist]

Troy,

On the Verifying of CDP comment below, are you
refering to the SmartPort macro commands (qos trust
ciscoipphone, etc) or something else? I tried
searching for a CDP verify command, etc but the qos
trust commands are closest I am finding. 

Thanks. 

--- Troy Sherman <tsherman at cisco.com> wrote:

> THS - Some switches now look at CDP (I know, but
> more difficult, do not
> remember the IOS versions) to make sure that they
> are seeing a CDP packet
> from the phone before they allow traffic on that
> voice vlan. It is baby
> steps until some newer features come out in the
> future. The best one off the
> top of my head is on the CatOS on the 6k (8.3.(4) I
> think), it uses a
> command called CDP verify to check this, otherwise
> traffic is blocked.