[cisco-voip] 3750 switch loses packets when pinging ip phones

[Jonathan Charles]

Confirmed, the phone is designed to respond to only a few pings per time
period to prevent DoS on the phones...

IOW, this is by design and a good thing.



Jonathan

On 12/9/06, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
>
>  I believe the phone is programmed to drop every other ping packet, so
> less than 100% success on a ping is normal.
>
>
> ----- Original Message -----
> *From:* gokhan senol <gokhanciscottl at yahoo.com>
> *To:* cisco-voip at puck.nether.net
> *Sent:* Saturday, December 09, 2006 2:53 PM
> *Subject:* [cisco-voip] 3750 switch loses packets when pinging ip phones
>
>  Hi
>
>
>
> i got 3750 switch and 7940 and 7960 ip phones.
>
> when i trp to ping ip phone from switch i lost lots of the packets. and
> this prevents ip phone registration to CCM.
>
> c3750-ipbase-mz.122-25.SEB2.bin
>
>
>
> ip phone ip address is a.b.c.155
>
>
>
> thats the config
>
>
>
> interface FastEthernet1/0/2
>  switchport mode access
>  switchport voice vlan 20
>  spanning-tree portfast
>
>
>
>
>
> interface Vlan1
>  no ip address
> !
> interface Vlan10
>  description ----DATA VLAN----
>  ip address x.y.z.131 255.255.255.128
>  !
> interface Vlan20
>  description ----VOICE VLAN----
>  ip address a.b.c.129 255.255.255.128
>
>
>
> i tried 3 phones and changed the cable but the problem is still going on.
>
> anyone has any idea
>
>
>
> thknx
>
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