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Cisco Bug: CSCur88126 - no IPV4 Mcast bit due to missing IDB on mcast enable on l3 bundle IF

Last Modified

Jul 20, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

4.1.1.MCAST 5.1.1.MCAST 5.1.3.MCAST

Description (partial)

Multicast packets dropped on a bundle member.

ASR9K increments the following NP counter  PARSE_DROP_IPV4_MCAST_NOT_ENABLED.

NCS6K increments the following PSE counter IPv4 MC not enabled

This is due to a particular sequence of events:
T0) No member is present on the linecard and no member has ever been configured on the linecard since the L3 bundle IF (or bundle sub-IF) has been configured.
T1) Multicast routing is enabled for the bundle IF or bundle sub-IF and committed
T2) A member is added on the linecard
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