Guest

Preview Tool

Cisco Bug: CSCvu37176 - SPAN filter cannot work well when configure FSPAN after 5th session.

Last Modified

Sep 17, 2020

Products (1)

  • Cisco Catalyst 3650 Series Switches

Known Affected Releases

16.6.8

Description (partial)

Symptom:
Here are six monitor sessions totally.
SPAN filter cannot work well when we configure normal span on 1st session to 4th session,
then configure FSPAN on the 5th session and 6th session.

For example,

Issue happens:

1)First, configure the normal SPAN on 1st session to 4th session
monitor session num1 source interface Gi1/0/5
monitor session num1 destination interface Gi1/0/6
monitor session num2 source interface Gi1/0/7
monitor session num2 destination interface Gi1/0/8
monitor session num3 source interface Gig 1/0/3
monitor session num3 destination interface Gig 1/0/4
monitor session num4 source interface Gig 1/0/15
monitor session num4 destination interface  Gig 1/0/16

2)Next, configure FSPAN on 5th to 6th session
monitor session num5 source interface Gig 1/0/2
monitor session num5 destination interface Gig 1/0/9
monitor session num5 filter ip access-group A
monitor session num6 source interface Gig 1/0/1
monitor session num6 destination interface  Gig 1/0/11
monitor session num6 filter ip access-group B

The issue doesn't happen:

1)Configure FSPAN on 1th&2th session or 3th&4th session or 1th&3th session or 2th&4th session.
monitor session num5 source interface Gig 1/0/2
monitor session num5 destination interface Gig 1/0/9
monitor session num5 filter ip access-group A
monitor session num6 source interface Gig 1/0/1
monitor session num6 destination interface  Gig 1/0/11
monitor session num6 filter ip access-group B


2)Configure normal FSPAN on the remaining session.
monitor session num1 source interface Gi1/0/5
monitor session num1 destination interface Gi1/0/6
monitor session num2 source interface Gi1/0/7
monitor session num2 destination interface Gi1/0/8

Conditions:
At least 5 monitor sessions are be configured.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.