[cisco-voip] Does callmanager 5.1 block pings?

Adam Blomfield adman at adman.net
Tue Nov 11 00:09:45 EST 2008


That makes sense. Do you know of a document that outlines this. I have a
customer that is very concerned about it as they think it indicates a
network issue, rather than being by design.

-Adam

On Mon, Nov 10, 2008 at 2:25 PM, Nick Griffin <nick.jon.griffin at gmail.com>wrote:

> ICMP Dos prevention, the phones do the same thing.
>
> On Mon, Nov 10, 2008 at 9:19 AM, Jason Roysdon <
> cisco-voip.20081105 at jason.roysdon.net> wrote:
>
>> While I've never seen it documented, yes, it is "normal" (but typically
>> system abnormal) behavior that I've experienced as well.
>>
>> Adam Blomfield wrote:
>> > Sorry to drag up an old thread, but I'm curious about this one. I have
>> > just ran across this exact same ping symptoms as shown below - four
>> > successful pings followed by one fail. I can replicate this on four
>> > separate clusters 100% of the time. In all cases I was pinging the CUCM
>> > from the default gateway (Catalyst switch). Is this expected behavior?
>> >
>> > -Adam
>> >
>> > On Fri, Feb 15, 2008 at 11:02 AM, Jonathan Charles <jonvoip at gmail.com
>> > <mailto:jonvoip at gmail.com>> wrote:
>> >
>> >     I am having voice quality issues (dropped packets), and when I ping
>> >     CCM, I get the following results:
>> >
>> >
>> >     VH-4507#ping 192.168.1.1 <http://192.168.1.1> repeat 50
>> >
>> >     Type escape sequence to abort.
>> >     Sending 50, 100-byte ICMP Echos to 192.168.1.1 <http://192.168.1.1
>> >,
>> >     timeout is 2 seconds:
>> >     !!!!!.!!!!!.!!!!!.!!!!!.!!!!!.!!!!!.!!!!!.!!!!!.!!
>> >     Success rate is 84 percent (42/50), round-trip min/avg/max = 1/1/4
>> ms
>> >     VH-4507#
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