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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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Troubleshooting Flowchart

Troubleshooting Flowchart

After IP multicast routing is enabled, Layer 3 multicast forwarding within a PIM domain fails.

The troubleshooting roadmap is as follows:
  • Check whether PIM is enabled on the interface that needs to forward multicast data packets.
  • Check whether the PIM status on the interface is Up.
  • Check whether the PIM neighbor relationship has been set up.
  • Check whether IGMP is enabled on the interface connected to the user network segment.
  • If the multicast network is running PIM-SM or Bidir-PIM, check whether the RP information is correct.
  • Check whether there is a reachable RPF route to the RP or multicast source.
  • Check whether multicast boundary is configured on the interface that needs to forward multicast data packets.
  • If the multicast network is running PIM-SM or Bidir-PIM, check whether a multicast source filtering policy is configured.
  • Check whether multicast entries have been generated.

Figure 15-1 shows the troubleshooting flowchart.

Figure 15-1 Troubleshooting flowchart for Layer 3 multicast forwarding Failures within a PIM domain

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Updated: 2020-01-07

Document ID: EDOC1000060766

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