Hi Zeeshanraza,
From this Cisco documentation: Configuring ERSPAN
"The monitor session span-session-number type local command is not supported on Cisco ASR 1000 Series Routers."
Alternatively you can try using ERSPAN as Local SPAN
Example: Configuring an ERSPAN as a Local SPAN
The following example shows how to configure an ERSPAN as a local SPAN.
monitor session 10 type erspan-source
source interface GigabitEthernet0/0/0
destination
erspan-id 10
ip address 10.10.10.1
origin ip address 10.10.10.1
monitor session 20 type erspan-destination
destination interface GigabitEthernet0/0/1
source
erspan-id 10
ip address 10.10.0.1
Regards,
Hendro
