Mirror Destination Properties

The mirror destination properties of a Layer 2 port-mirroring instance specify the destination of the mirrored packets:

• The number of port-mirroring destinations supported for an MX-series router is limited to the number of Packet Forwarding Engines contained on the dense port concentrators (DPCs) installed in the router chassis. To determine the number and type of DPCs in an MX-series router chassis, use the show chassis hardware command.
• If port mirroring is enabled at both ingress and egress interfaces, you can prevent the MX-series router from sending duplicate packets to the same destination (which would complicate the analysis of the mirrored traffic) by enabling the mirror-once option.

Note: In typical applications, you send the sampled packets to an analyzer or a workstation for analysis, not to another router. If you must send this traffic over a network, you should use tunnels. For Layer 2 VPN implementations, you can use the Layer 2 VPN routing instance type l2vpn to tunnel the packets to a remote destination. For information about configuring a routing instance for Layer 2 VPN, see the JUNOS VPNs Configuration Guide. For a detailed Layer 2 VPN example configuration, see the JUNOS Feature Guide. For information about tunnel interfaces, see the JUNOS Network Interfaces Configuration Guide.

Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice.