By default, for security reasons, an interface is disabled to send ICMP Time Exceeded message, you need to use the icmp ttl-exceeded send command to enable the function.
In addition, please pay attention to the relevant two commands. icmp host-unreachable send - this command enables transmitting the ICMP host-unreachable packets; undo firewall defend tracert enable - if (firewall defend tracert enable)command is configured, an FW discards ICMP timeout packets, UDP timeout packets, or destination port unreachable packets.
By default, for security reasons, an interface is disabled to send ICMP Time Exceeded message, you need to use the icmp ttl-exceeded send command to enable the function.
In addition, please pay attention to the relevant two commands. icmp host-unreachable send - this command enables transmitting the ICMP host-unreachable packets; undo firewall defend tracert enable - if (firewall defend tracert enable)command is configured, an FW discards ICMP timeout packets, UDP timeout packets, or destination port unreachable packets.
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