Hello all,
I have a router 1812 Version 12.4(15)T16, RELEASE SOFTWARE (fc2). Router is doing NAT.
I have a lifesize videoconference system. Calls with h323 are dropped after 30 seconds.
I have ip inspect rule :
[...]
- ip inspect name SDM_LOW h323
- ip inspect name SDM_LOW h323callsigalt
[...]
interface FastEthernet0
ip address xxx.xxx.xxx.xxx 255.255.255.248
ip access-group 102 in
ip verify unicast reverse-path
ip nbar protocol-discovery
ip flow ingress
ip flow egress
ip nat outside
ip inspect SDM_LOW out
ip virtual-reassembly
ip route-cache flow
speed 100
full-duplex
crypto map SDM_CMAP_1
service-policy input sdmappfwp2p_SDM_LOW
service-policy output sdmappfwp2p_SDM_LOW
When I start a communication, I have
sh ip inspect sessions
Session 85AE7150 (50.59.87.241:60118)=>(192.168.200.200:60016) h323-RTP-audio SIS_OPEN
Session 85AE12C0 (50.59.87.241:60119)=>(192.168.200.200:60017) h323-RTCP-audio SIS_OPEN
Session 85AE39B0 (192.168.200.200:60001)=>(50.59.87.241:62830) h245-media-control SIS_OPEN
Session 841F7CEC (192.168.200.200:60005)=>(50.59.87.241:1720) h323 SIS_OPEN
Session 85AE20A8 (50.59.87.241:60120)=>(192.168.200.200:60018) h323-RTP-video SIS_OPENING
Session 85ADE0B0 (50.59.87.241:60121)=>(192.168.200.200:60019) h323-RTCP-video SIS_OPENING
Session 85AE4D28 (50.59.87.241:60122)=>(192.168.200.200:60020) h323-RTP-data SIS_OPENING
Session 85ADCD38 (50.59.87.241:60123)=>(192.168.200.200:60021) h323-RTCP-data SIS_OPENING
Pre-gen session 85ADA648 192.168.200.200[1024:65535]=>50.59.87.241[60119:60119] h323-RTCP-audio
Pre-gen session 85AD92D0 192.168.200.200[1024:65535]=>50.59.87.241[60121:60121] h323-RTCP-video
Pre-gen session 85ADB6F8 192.168.200.200[1024:65535]=>50.59.87.241[60123:60123] h323-RTCP-data
Pre-gen session 85AD9008 192.168.200.200[1024:65535]=>50.59.87.241[60118:60118] h323-RTP-audio
Pre-gen session 85AE5848 192.168.200.200[1024:65535]=>50.59.87.241[60119:60119] h323-RTCP-audio
Where 192.168.200.200 is local IP and 50.59.87.241 the server I try to reach.
Any idea of what is going on ? Why calls are dropped after 30 seconds ?
Something with NAT ?
