Igmp Snooping Diagnostics; Mfib Ping - Alcatel-Lucent 7750 SR OS Service Manual

IGMP Snooping Diagnostics

MFIB Ping

The multicast forwarding information base (MFIB) ping OAM tool allows to easily verify inside a
VPLS which SAPs would normally egress a certain multicast stream. The multicast stream is
identified by a source unicast and destination multicast IP address, which are mandatory when
issuing an MFIB ping command.
An MFIB ping packet will be sent through the data plane and goes out with the data plane format
containing a configurable VC label TTL. This packet traverses each hop using forwarding plane
information for next hop, VC label, etc. The VC label is swapped at each service-aware hop, and
the VC TTL is decremented. If the VC TTL is decremented to 0, the packet is passed up to the
management plane for processing. If the packet reaches an egress node, and would be forwarded
out a customer facing port (SAP), it is identified by the OAM label below the VC label and passed
to the management plane.
7750 SR OS Services Guide
OAM and SAA
Page 1377