Port mirroring selects the network traffic for analysis by a network analyzer. This is done for specific ports of the switch. As such, many switch ports are configured as source ports and one switch port is configured as a destination port. You can configure how traffic is mirrored on a source port. Packets that are received on the source port, that are transmitted on a port, or are both received and transmitted, can be mirrored to the destination port.
The packet that is copied to the destination port is in the same format as the original packet on the wire. This means that if the mirror is copying a received packet, the copied packet is VLAN tagged or untagged as it was received on the source port. If the mirror is copying a transmitted packet, the copied packet is VLAN tagged or untagged as it is being transmitted on the source port.
Use the Multiple Port Mirroring page to define port mirroring sessions.
To access this page, click
in the navigation menu.Use the buttons to perform the following tasks:
Field | Description |
---|---|
Session ID | The port mirroring session ID. The number of sessions allowed is platform specific. |
Mode | The administrative mode for the selected port mirroring session. If the mode is disabled, the configured source is not mirroring traffic to the destination. |
Destination |
|
IP ACL | The IP access-list ID or name attached to the port mirroring session. |
MAC ACL | The MAC access-list name attached to the port mirroring session. |
Source | The ports or VLAN configured to mirror traffic to the destination. You can configure multiple source ports or one source VLAN per session. The source VLAN can also be a remote VLAN. |
Direction | The direction of traffic on the source port(s) that
is sent to the probe port. Possible values are:
|