Configuring mirroring is similar to creating a unidirectional service. Mirroring requires the configuration of:
mirror source - the traffic on specific points to mirror
mirror destination - the location to send the mirrored traffic where the sniffer will be located
Figure: Local mirroring example shows a local mirror service configured on ALA-A.
Port 1/1/2 is specified as the source. Mirrored traffic ingressing and egressing this port will be sent to port 1/1/3.
SAP 1/1/3 is specified as the destination. The sniffer is physically connected to this port. Mirrored traffic ingressing and egressing port 1/1/2 is sent here. SAP, encapsulation requirements, and mirror classification parameters are configured.
Figure: Local mirroring example
The following figure shows a remote mirror service configured as ALA-B as the mirror source and ALA-A as the mirror destination. Mirrored traffic ingressing and egressing port 5/2/1 (the source) on ALA-B is handled the following ways:
Port 5/2/1 is specified as the mirror source port. Parameters are defined to select specific traffic ingressing and egressing this port.
Figure: Remote mirroring example
Destination parameters are defined to specify where the mirrored traffic is sent. In this case, mirrored traffic sent to a SAP configured as part of the mirror service on port 3/1/3 on ALA-A (the mirror destination).
ALA-A decodes the service ID and sends the traffic out of port 3/1/3.
The sniffer is physically connected to this port (3/1/3). SAP, encapsulation requirements, packet slicing, and mirror classification parameters are configured in the destination parameters.