ESR series service routers.ESR-Series. User manual
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8.12  Mirroring configuration (SPAN/RSPAN)
Traffic mirroring is a feature of the router that allows for redirection of traffic from a specific port of the router 
to another port of the same router (local mirroring) or to a remote device (remote mirroring).
8.12.1  Configuration algorithm
Step Description Command Keys
1 Define VLAN over which the mirrored 
traffic will be transmitted (in case of 
using remote mirroring).
esr(config)# port monitor remote 
vlan <VID> <DIRECTION>
<VID> – VLAN ID, set in the 
range of [2..4094];
<DIRECTION> – traffic 
direction:
tx – mirroring only 
outgoing traffic to the 
specified VLAN;
rx – mirroring only 
incoming traffic to the 
specified VLAN.
2 Enable the remote mirroring mode (in 
case of using remote mirroring).
esr(config)# port monitor remote
3 Define the mode of the port 
transmitting mirrored traffic (optional).
esr(config)# port monitor mode 
<MODE>
<MODE> – mode:
network – combined 
data transfer and 
mirroring (default);
monitor-only – mirroring 
only.
4 Enable mirroring in the interface 
configuration mode.
esr(config-if-gi)# port monitor 
interface <IF> [ <DIRECTION> ]
<IF> – interface from which the 
frames will be mirrored;
<DIRECTION> – traffic 
direction:
tx – mirroring only 
output traffic;
rx – mirroring only input 
traffic;
In the current firmware version the RSPAN functionality is supported only by 
ESR-1000/1200/1500/1511/1700 routers.