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Cisco Bug: CSCuq78652 - IGMP group specific queries wrongly sent on Primary vlan tag

Last Modified

Sep 14, 2019

Products (1)

  • Cisco Catalyst 4000 Series Switches

Known Affected Releases

12.2(54)SG1

Description (partial)

Symptom:
IGMP group specific queries are sent out of a private vlan trunk port wrongly with the primary vlan tag.
IGMP general queries and regular multicast traffic is sent out of the port with the secondary vlan tag

Conditions:
When any end host is connected to a trunk port with the following configuration:

 switchport trunk allowed vlan x-y
 switchport private-vlan trunk native z
 switchport private-vlan trunk allowed vlan x-y
 switchport private-vlan association trunk primary vlan, secondary vlan

Switch runs  12.2(54)SG1 and below
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  • Full Description (including symptoms, conditions and workarounds)
  • Status
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