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MX MultiWAN Backup Uplink

Failover process and test results

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MultiWAN Backup Uplink summary

MultiWAN (2 Active + 1 Backup link)

MultiWAN enables more than two functional uplinks on supported models like the MX75, MX85, MX95, MX105 with more than two dedicated WAN links.

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Feature

This iteration of MultiWAN support enables a third link as a backup link on supported platforms. The third link mimics the failover behavior of the embedded cellular feature on supported MX(C) Appliances - which means the third link remains in standby mode until both primary and secondary uplinks are down. Note, the order is different than with cellular links.

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Security Appliances WAN Failures

Internet 1

Internet 2

Primary Uplink

Primary Uplink

Primary

Primary

Spare

MX 1

MX 2

MS 1 (root)

MS 2

Internet 3

The MX75, 85, 95, and 105 support MultiWAN Backup Uplink - All LAN links have the same config - trunks, allow all VLANs, and a native VLAN

1

2

3

1

2

3

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MX Uplinks

Note - Insight speed test on WAN 3 only works when it becomes the active WAN link (WAN 1 & 2 down)

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WAN 1 to WAN 2 failover

Loss for internet bound traffic

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WAN 2 to WAN 3 failover

Loss for internet bound traffic

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WAN 1 to WAN 2 failover

Loss for internet & VPN bound traffic. Multi-Uplink AutoVPN enabled which creates tunnels on WAN1 and WAN2.

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WAN 2 to WAN 3 failover

Loss for internet & VPN bound traffic. VPN traffic takes longer due to tunnel establishment on WAN3.

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Thank you