Tag: Ping
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Fixing macOS Ethernet (en0) IPv6 SLAAC Issues Caused by IGMP Snooping in VLAN Environments
Introduction Many macOS users rely on both Ethernet and Wi-Fi for network connectivity. However, some users have encountered a puzzling issue: while their Wi-Fi (en1) interface correctly obtains an IPv6 address and functions as expected, their Ethernet (en0) interface, despite also obtaining an IPv6 address, fails to communicate externally via IPv6. This issue is particularly… Read more…
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Resolving ping6 Issues on macOS with Multiple Network Interfaces
When using macOS with both Ethernet and Wi-Fi enabled, you might encounter issues with the ping6 command failing to receive packets unless you explicitly specify a network interface. For instance, running ping6 dns.google may yield no response, but ping6 dns.google -I en1 works correctly. This problem is primarily caused by the system’s inability to determine… Read more…
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An Overview of TCPing: A Useful Network Diagnostic Tool
TCPing is a powerful utility designed for network diagnostics and performance monitoring, particularly useful for troubleshooting connectivity issues. Similar to the traditional ICMP-based ping, TCPing utilizes the TCP protocol to probe network services, providing a practical alternative when ICMP traffic is restricted or unavailable. What is TCPing? At its core, TCPing tests the reachability of… Read more…