Access • Re: Frequent IPv4 outages due to ARP requests not being answered

VyOS documentation (quality unknown) https://vyos.dev/w/user-guide/?v=2 Basic Connectivity Verification section suggests VyOS ping accepts both IP and MAC address.

Please run ping with both IP and MAC when interface both works and fails; four (4) use cases.

ARP is a Layer 2 link level broadcast domain protocol.

• Are there switches (basic or managed) between ONT interface and VyOS interface?
• See VyOS documentation Bridging section; does VyOS have active bridge interface?

If either above is true then consider Spanning Tree Protocol port block due to a switching loop.

This is a hack. When service is up, query VyOS for its default route to Sonic IP and MAC addresses.
Create VyOS static persistent ARP entry with above IP and MAC.
Static ARP in VyOS makes Sonic ARP response irrelevant.
This hack breaks when Sonic changes IP and/or MAC.

Statistics: Posted by conradpino — Thu Jan 16, 2025 7:56 am

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