Routing

Answer

Junos OS supports multiple port mirror destinations in MX Series routers. All platforms support multiple source ports (interfaces that need to be mirrored).

• You can port-mirror traffic from a Layer 2 VPN on MX Series routers for PE routers.
• You can port-mirror the outgoing and incoming traffic of a given MX Series interface.

In Junos OS Release 9.6R2 and later, if the following conditions are met, an integrated routing and bridging (IRB) packet can be mirrored as a Layer 2 packet:

1. The IRB is associated with the bridge-domain or vpls routing-instance.
2. The bridge-domain has a forwarding table filter configured with an action of then port-mirror or then port-mirror-instance instance.

You can disable this Layer 2 IRB port mirroring using the no-irb-layer-2-copy statement at the bridge-domain or the vpls routing-instance hierarchy level.

For more information, click Layer 2 VPNs and VPLS Feature Guide.