[cisco-voip] Nat skynny,why overload if not configured?

[Mauro Celli]

I need to nat some skinny phone (I have no other option)
This is relevant configuration:
ip nat translation timeout 60
ip nat translation tcp-timeout 60
ip nat translation udp-timeout 60
ip nat pool Voce 172.21.3.10 172.21.3.254 netmask 255.255.255.0 type rotary
access-list 100 permit ip 192.168.202.0 0.0.0.255 172.20.10.0 0.0.0.255
access-list 100 permit ip 10.0.0.0 0.0.0.255 172.20.10.0 0.0.0.255
ip nat inside source list 100 pool Voce
I have tried to leave "type rotary" and timeout,i cannot use "type match host" because I have two subnet to nat.
Sometimes I find two phones with the same natted ip even if the pool has several more available ip (about 200 avaiable ip).
Obviously I have issues in this case on phones.

Show ip nat translation during problem:
tcp 172.21.3.167:14679    10.0.1.1:14679        172.20.10.5:2000      172.20.10.5:2000
--- 172.21.3.167          10.0.1.1              ---                   ---
tcp 172.21.3.167:50460    192.168.202.58:50460  172.20.10.5:2000      172.20.10.5:2000
--- 172.21.3.167          192.168.202.58        ---                   ---


Why router make a nat overload???


Cordiali saluti
Mauro Celli (work in progress...)
Site: www.2000net.it<http://www.2000net.it/>
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Email: mauro.celli at 2000net.it<mailto:mauro.celli at 2000net.it>
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