You could configure remote mirroring:
https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-remote-mirroring/
Or you can try our new L3 Remote mirroring if your using 22.4 and newer:
Remote Mirroring Using Layer 3
To use remote mirroring using Layer 3, enable IPv4 forwarding along the routed path to the device
collecting GRE-encapsulated mirrored packets, also known as ERSPAN. Then, configure the collector
device's IP address as the remote IP adddress in the following command:
code:enable mirror {mirror_name} to remote-ip remote_ip_address {{vr}
vr_name} {from [source_ip_address | auto-source-ip]} {ping-check [on |
off]}]