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wg Tunnelblockade #100

Description

@1977er

Symptoms:

  • Packets going into the wg interface on the supernode stop arriving on the node at the mesh_wg interface. (tcpdump -ni mesh_wg inbound).
  • Packets are still visible on br-wan.
  • wg handshakes are renewed.
  • CPU load drops significantly (to <20% on ER-X).
  • Memory load increases by a small but stable base amount.

Resulting symptoms:

  • Batman VPN Neighbors goes down to 0.
  • TX Link Quality to Supernodes (aka. TQ) no longer gets telemetry.
  • RX Link Quality from Supernodes (aka. reversed TQ) goes down to <5%.
  • Forward TX Traffic drops to 0.

See from:

Actions taken so far:

  • Monitoring checks if vpn_neighbors=0 (only works for sites with multiple uplinks).

(Edit by @lemoer: translated using deepl to english)

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