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Cisco Bug: CSCuq64869 - 3750X:multicast packet flood to vlan even with IGMP snooping enabled

Last Modified

Sep 14, 2019

Products (150)

  • Cisco Catalyst 3750-X Series Switches
  • Cisco IE 2000-16TC-G Industrial Ethernet Switch
  • Cisco Catalyst 3560X-48P-S Switch
  • Cisco Embedded Service 2020 CON B Switch
  • Cisco Catalyst 2960X-48LPS-L Switch
  • Cisco Catalyst 3560X-48T-E Switch
  • Cisco Catalyst 2960X-24PD-L Switch
  • Cisco Catalyst 3560CG-8TC-S Compact Switch
  • Cisco Catalyst 2960S-24PD-L Switch
  • Cisco Catalyst 2960X-24PS-L Switch
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Known Affected Releases


Description (partial)

With multicast routing enabled on a Cat3750X,multicast packet 
sourced from directly connected route is flooded to vlan if no S,G entry
in a mroute even if IGMP snooping is enabled.

-with multicast routing enabled
-no S,G entry in mroute
-Multicast source is directly connected.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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