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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


Description (partial)

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

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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