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Cisco Bug: CSCuq03344 - Multicast traffic drops although multicast entry exists on the table.

Last Modified

Sep 14, 2019

Products (150)

  • Cisco Catalyst 3560-X Series Switches
  • Cisco IE 2000-16TC-G Industrial Ethernet Switch
  • Cisco Catalyst 2960X-48LPS-L Switch
  • Cisco Catalyst 3560X-48T-E Switch
  • Cisco Catalyst 2960C-12PC-L Switch
  • Cisco Embedded Service 2020 24TC NCP B Switch
  • Cisco Catalyst 2960X-24PD-L Switch
  • Cisco Catalyst 3560X-48U-S Switch
  • Cisco Embedded Service 2020 CON B Switch
  • Cisco Catalyst 2960X-24PS-L Switch
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Known Affected Releases

15.2(2)E 15.2(2.0)E

Description (partial)

Multicast traffic drops although multicast entry exists on the table.

The issue happens when interface of Outgoing interface list is down and Multicast entry is existing.
Then interface of Outgoing interface list is up.  multicast routing table is seem like that it's no problem.
But Sender fails multicast.

Related Community Discussions

2014年4月24日(初版) TAC SR Collection 主な問題 Catalyst3560Xシリーズ/Catalyst3750XシリーズでIPv6のマルチキャストテーブルにエントリーがある状態で、OutgoingのインターフェースがDown -> UPすると、その後同インタフェースがアップした状態でマルチキャストテーブルにエントリがあるにも関わらず、マルチキャスト通信が破棄され続けることがあります。 問題発生時、マルチキャストテーブルは正常時と変わりません。 (*, FF03::1), 00:09:22/00:03:15, RP 2001::1, flags: SC   Incoming interface: Vlan200   RPF nbr: FE80::D230:FDA1:8756:93C3   Immediate Outgoing interface list:     Vlan100, Forward, 00:09:22/00:03:15 (2001:0db8::1, FF03::1), 00:03:19/00:00:10, flags: ST   Incoming ...
Latest activity: Mar 21, 2019
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