all my IP phones connected to 5 switches grouped into a VLAN that only carries voice traffic. (Voice VLAN) also i have more 10 VLANS shared in our switches.thru VTP domain
SPAN is configured on the top switch to use Voice VLAN as the source of network traffic, any voice traffic sent or received by a port that is part of Voice VLAN that traverses the top switch will be copied and sent to the SPAN destination port.
It is captured only if the phone is sending packets that hit the top switch. This is also the case if the phone on the bottom switch was on a call with an IP phone connected to the top switch. It also works if the phone on the bottom switch is sending packets through the top switch to a connected gateway.
my Question is :-
the SPAN Port didn't capture -only- the calls between 2 IP phones @ the same switch.
all my switches is CISCO 3560
can any one help me please?