When you make a call you expect to be able to hear the person on the other side? Thats a pretty simple request. In the world of communications most calls are actually not just one stream that is shared. Its 2 streams going in the opposite directions. In the IP world sometimes the packets take different directions, other times firewalls get in the way and numerous other issues that can make you have a less than pleasant call. So I had a customer that I have been dealing with who was experiencing this issue on international calls. Real quick troubleshooting pointed to the SIP provider as all other calls were working which took PRI circuits to the PSTN. Now this is here this gets interesting. We have a provider that can only troubleshoot through packet capture. They could take the debugs showing that we were packets only coming one way. This router was in a situation where we can't get packet captures so we can do traffic export. This feature is new in IOS 12.3 So its been around for quite so time.
Config t
ip traffic-export profile audio mode capture
bidirectional
exit
!apply to an interface
interface g0/0<------interface you want to capture from
ip traffic-export apply audio [size
]
Then you can use these exec (enable) level commands:
traffic-export interface g0/0 clear
traffic-export interface g0/0 start
traffic-export interface g0/0 stop
traffic-export interface g0/0 copy ftp://username:password@x.x.x.x/capture.pcap
Pretty easy to do. Then we sent them off to the provider. They adjusted some routes and my problem was solved. In the end of day make sure you understand all the tools available so you can effectively troubleshoot.
No comments:
Post a Comment