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Home > Archive > Voice over IP Cisco > June 2005 > Publishing CCM through NAT disconnect call after 10
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Publishing CCM through NAT disconnect call after 10
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| Brain Whistler 2005-06-21, 2:45 am |
| Hi,
I have published my call manager through static NAT on
my router with IOS 12.3.11T ipvoice. While at user end
I am using IP softphones which are running on "ip NAT
overload".
The problem I am facing is that my every inbound and
outbound calls get disconnected after 10 minutes.
Does anyone know where is the problem, or there is a
bug with the NAT on mentioned IOS.
Thanks
Brain
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| Kevin Thorngren 2005-06-21, 7:45 am |
| Hi Brian,
You might be running into this:
CSCsa49340 - NAT should support garbage octet for TCP keepalives per
RFC1122
Cisco IOS Network Address Translation (NAT) does not support TCP
keepalives that have
a garbage octet per section 4.2.3.6 of RFC1122.
With the later CCM OS builds Windows has decreased the TCP KeepAlive
timer via a registry entry. This is to reduce the chance of having a
security breach. The KeepAlive that Windows sends is per the above RFC
but NAT does not support this in the version you are running. Looks
like the fix is in 12.3(11)T4.
HTH,
Kevin
On Jun 21, 2005, at 3:18 AM, Brain Whistler wrote:
> Hi,
>
> I have published my call manager through static NAT on
> my router with IOS 12.3.11T ipvoice. While at user end
> I am using IP softphones which are running on "ip NAT
> overload".
>
> The problem I am facing is that my every inbound and
> outbound calls get disconnected after 10 minutes.
>
> Does anyone know where is the problem, or there is a
> bug with the NAT on mentioned IOS.
>
> Thanks
> Brain
>
>
>
> __________________________________
> Yahoo! Mail
> Stay connected, organized, and protected. Take the tour:
> http://tour.mail.yahoo.com/mailtour.html
>
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
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