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[Junos] Forwarding-options analyzer config interface on whitebox

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Article ID: KB35749 KB Last Updated: 30 Apr 2020Version: 1.0
Summary:
There are several things to pay attention to when:
  • Using port mirror config in release 18.1R3-S3.8 on whitebox as 7816-64x
  • Adding config under forwarding-options analyzer with ae bundle as input interfaces
 
Symptoms:

Sometimes, even though the config goes through, there may still be issues.

Sample config:

set forwarding-options analyzer VXLAN input ingress interface ae301.41
set forwarding-options analyzer VXLAN output interface et-0/0/29.0
Solution:
  • When the ae bundle has multiple member links and is used as input interface, do NOT use any of the member links as the output interface. Otherwise, you may only capture part of the traffic, not all. Traffic on the output interface of the analyzer will not be captured.

    In the sample config, if ae301 has two member links et-0/0/28 and et-0/0/29, port mirror will work only on link et-0/0/28 but not et-0/0/29.

  • It is okay to use 'interface all' in the config to include all interfaces for monitoring, but it sill has a hardware limit of 64 interfaces in total.

  • No port mirroring/analyzer is supported on ae member interfaces for input interface. It is supported only on ae bundle.

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