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Log Reference

S9300, S9300E, and S9300X V200R010C00

This document provides the explanations, causes, and recommended actions of logs on the product.
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MCAST/6/TTL_ONE: The TTL of the packet is one. (group ip=[STRING], source ip=[STRING], in-VlanID=[ULONG])


The TTL value of a multicast data packet is 1.


Parameter Name Parameter Meaning
group ip Indicates the IPv4/IPv6 address of a multicast group.
source ip Indicates the IPv4/IPv6 address of a multicast source.
in-VlanID Indicates the inbound VLAN ID of a multicast data packet.

Possible Causes

The TTL value of a multicast data packet is 1 and will not be forwarded to the next Layer 3 device


  1. Determine whether the multicast data packet needs to be forwarded to the next-hop Layer 3 switch based on the current multicast service configuration.

    • If yes, go to step 2.
    • If no, this log message is informational only, and no action is required.

  2. Obtain packet header information in incoming multicast packets on the inbound interface of the multicast data flow, and check whether the TTL value in the packet header is 1.

    • If yes, go to step 3.
    • If no, go to step 4.

  3. Run the state-refresh-ttl ttl-value (IPv4) command or state-refresh-ttl ttl-value (IPv6) command to set a new TTL value for multicast data packets. Request for the multicast data flow again and check whether multicast data packets can be forwarded normally. If not, go to step 4.
  4. Collect log information and configuration information, and then contact technical support personnel. You can collect diagnostic information using the display diagnostic-information command.
Updated: 2019-08-21

Document ID: EDOC1000142069

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