thanks Paul
I can only use sflow, however I am using the version of XOS 15.3 that do not support sflow egress, I have found that the sflow egress is supported from the version of XOS 15.4. I'm using the version of XOS 15.3.3.5-patch1-9, if I think change to version 15.4, which is the version and patch15.4 more stable?
regards