From: Carlos G Mendioroz (tron@huapi.ba.ar)
Date: Thu Dec 12 2002 - 19:52:40 GMT-3
Tran,
Q> why broadcast packet still trigger the call
A> Because you declared all ip traffic as interesting.
... so any IP (even broadcast) will trigger a call.
CDP does not run over IP, so the "no cdp enable" has no effect.
"no ip directed broadcast" prevents the router from expanding
a directed broadcast into a layer 2 broadcast. It does not
filter broadcasts any more than that.
Q> how to prevent this?
you already received some advice here...
Tran Tien Phong wrote:
> Hi guys,
>
> When configuring DDR between 2 sites, I noticed that the broadcast still triggered the call. The "show dialer" displayed: Dial reason: source: x.x.x.x, destination: 255.255.255.255.
>
> The interesting traffic was defined: dialer-group 1, dialer-list 1 protocol ip permit
> Also, I used the command "no ip directed-broadcast" and "no cdp enable" at both sides and no routing protocols running between two sides.
>
> Anyone can tell me why broadcast packet still trigger the call and how to prevent this?
>
> Thanks
> Tran Tien Phong
> .
-- Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina .
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