I configured remote span between Extreme Networks X460-24p and Cisco Cataylst 2960X switches. 2 IP phones are connected to ports 15 and 17 on Extreme switch, and are monitored to port 1/0/47 on Cisco switch. Extreme and Cisco switches are interconnected with trunk (port 28 on Extreme with port 1/0/51 on Cisco).
I configured the following:
On Extreme switch:
configure mirror mode enhanced
enable mirroring to port 28 remote-tag 1000
configure mirroring add port 17 ingress-and-egress
configure mirroring add port 15 ingress-and-egress
On Cisco switch:
vlan 1000
name RemoteSPAN
remote-span
monitor session 1 destination interface Gi1/0/47
monitor session 1 source remote vlan 1000
This is working 🙂