This document talks about the analyzers / port mirroring on EX4400 device, which might show the status as DOWN when multiple analyzers were configured.

On configuring more than one analyzer on EX4400, Only one analyzer might show the status as UP. While the other analyzers might not the status as DOWN.

• A maximum of four port mirroring instances, or four analyzer sessions, can be configured at the same time. In other words, you cannot configure four port mirroring instances and four analyzer sessions together.

• If there are no port mirroring instances, (that is, only analyzer sessions are configured), then you can enable up to three analyzer sessions for ingress and egress mirroring. The remaining analyzer session must be used for ingress mirroring only.

• If you have only one port mirroring instance configured, then of the remaining instances, you can configure up to three analyzers for ingress mirroring, and two analyzers for egress mirroring.

• If you have two port mirroring instance configured, then of the remaining instances, you can configure up to two analyzers for ingress mirroring, and one analyzer for egress mirroring.

• If you have three port mirroring instance configured, then the remaining instance can only be configured as an analyzer (for either ingress or egress mirroring).

Configuring the below on the output interface of the analyzer session will resolve the issue when multiple analyzer were configured on the device:

root@switch#set interfaces <interface-name> unit 0 family ethernet-switching