Asymmetry in failover times

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aironfabio
Conversationalist

Asymmetry in failover times

Hello team,

 

I have a setup with two uplinks (WAN1 and WAN2), from 2 different service providers, connected to an MX250 (18.211.6) appliance. Both ISP routers are connected to a switch and through different VLANs they get to MX fiber ports.

 

The setup is as Load Balancing 50/50 (the two lines are both 1Gbps) with no relevant flow preferences.

 

trying a failover test, powering off one router at the time, I can see that failover from WAN1 (primary) to WAN2 takes about 20 to 30 pings (which is a lot) whereas failover from WAN2 to WAN1 is extermely fast (1 or 2 pings lost at most).

 

is this expected? Does it take more for the MX to "give up" on the Primary WAN even in symmetrical load balancing? Or am I experiencing some kind of issue that needs to be adressed?

 

thanks

F.

 

 

1 Accepted Solution
JamesT91
Head in the Cloud
Head in the Cloud

You could try changing your WAN failover behaviour from Graceful to Immediate and re-test. 

 

Connection Monitoring for WAN Failover - Cisco Meraki Documentation

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1 Reply 1
JamesT91
Head in the Cloud
Head in the Cloud

You could try changing your WAN failover behaviour from Graceful to Immediate and re-test. 

 

Connection Monitoring for WAN Failover - Cisco Meraki Documentation

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