Juniper EX9200 Features Manual page 39

Copyright © 2016, Juniper Networks, Inc.
Specify global-level mirror destination properties for this address family.
6.
Specify the physical interface on which to send the mirrored packets:
a.
[edit forwarding-options port-mirroring family family output]
user@host# set interface interface-name
You can also specify an integrated routing and bridging (IRB) interface as the
output interface.
(Optional) Allow configuration of filters on the destination interface for the named
b.
port-mirroring instance:
[edit forwarding-options port-mirroring family family output]
user@host# set no-filter-check
(Optional) Specify that any packets selected for mirroring are to be mirrored only
7.
once to any mirroring destination:
[edit forwarding-options port-mirroring family family output]
user@host# up 2
[edit forwarding-options port-mirroring]
user@host# set mirror-once
TIP: Enable the
Series switch is configured to perform Layer 2 port mirroring at both ingress
and egress interfaces, which could result in sending duplicate packets to
the same destination (which would complicate the analysis of the mirrored
traffic).
Verify the minimum configuration of the global instance of Layer 2 port mirroring:
8.
[edit forwarding-options ... ]
user@host# top
[edit]
user@host# show forwarding-options
forwarding-options {
port-mirroring {
input { # Global packet-selection properties.
maximum-packet-length number; # Default is 0.
rate number;
run-length number;
}
family (ccc | vpls) { # Address- type 'ethernet-switching' displays as 'vpls'.
output { # Global mirror destination properties.
interface interface-name;
no-filter-check; # Optional. Allow filters on interface.
}
}
mirror-once; # Optional. Mirror destinations do not receive duplicate packets.
}
}
option when an MX Series router or an EX
mirror-once
Chapter 5: Port Mirroring Instances
23