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Option: Sending Traffic to Multiple Export Interfaces by Using Next-Hop Groups

To send port-mirrored traffic to multiple flow servers or packet analyzers, you can use the next-hop-group statement. The router can make up to 16 copies of traffic per group and send the traffic to the next-hop group members you configure. A maximum of 30 groups can be configured on a router at any given time. The port-mirrored traffic can be sent to any interface, except aggregated SONET/SDH, aggregated Ethernet, loopback (lo0), or administrative (fxp0) interfaces. To configure multiple port mirroring with next-hop groups, include the next-hop-group statement at the [edit forwarding-options] hierarchy level.

You must port-mirror the initial traffic to a tunnel interface so that it can be filtered and duplicated. Also, you need configure only the interface names for point-to-point interfaces, but you must configure the interface names and a next hop for multipoint interfaces (such as Ethernet).

[edit]forwarding-options {port-mirroring {family inet {input {rate 1;}output {interface vt-3/3/0.1;no-filter-check;}}}next-hop-group ftp-traffic {interface so-4/3/0.0;interface so-0/3/0.0;}next-hop-group http-traffic {interface ge-1/1/0.0 {next-hop;}interface ge-1/2/0.0 {next-hop;}}next-hop-group default-collect {interface so-7/0/0.0;interface so-7/0/1.0;}}

Note: Next-hop groups are supported on M Series routers only, except the M120 router and the M320 router.

Published: 2010-04-15

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