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Cisco Bug: CSCta62382 - 3560E/3750E: IGMP Membership reports dropped on dot1q tunnel Interface

Last Modified

Feb 13, 2018

Products (1)

  • Cisco Catalyst 3750-E Series Switches

Known Affected Releases


Description (partial)


IGMP Membership reports from the Hosts may be dropped on 3560E/3750E
Dot1Qtunnel interface preventing multicast traffic from being forwarded
between sites. 

This issue is seen in 3750E and 3560E switches.
3750E/3560E edge switch configured for dot1q-tunnel:

 interface GigabitEthernet1/0/1 (tunnel port)
  switchport access vlan 100
  switchport trunk encapsulation dot1q
  switchport mode dot1q-tunnel
  l2protocol-tunnel cdp
  l2protocol-tunnel stp
  l2protocol-tunnel vtp
  no cdp enable
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  • Full Description (including symptoms, conditions and workarounds)
  • Status
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