Unable to ping to Secondary ISP IP from Primary ISP IP

[URONMAPU]

Hello Everyone,

I'm using two internet connections: a primary ISP and a secondary ISP.

Is there a way to ping the public IP address of the secondary ISP from within the local network?

I would appreciate it if you could share the configuration steps.

Thank you so much!

[Raido_Rattameister]

Only if you have different ISP links in configured in different virtual routers.

If both ISP links are in same virtual router and you ping using ISP1 IP towards ISP2 next hop then this packet will go out from ISP2 link using ISP1 IP.

ISP either drops this (if their filters are set correctly due you spoofing source IP that they did not give you) or will receive it but send reply packet towards ISP1 (causing asymmetric traffic).

[OtakarKlier]

Hello,

Are you trying to ping the IP of the PAN interface that has the IP assigned or the ISP's next hop IP address to check if its up?

Regards,

[URONMAPU]

Hello @Raido_Rattameister , @OtakarKlier 

I have two ISP connections. Each connection passes through a media converter operating in bridge mode and is connected to a dedicated interface on the same firewall.

The two ISP links are configured in a failover setup, where the Secondary ISP serves as a backup for the Primary ISP. If the Primary ISP link becomes unavailable, traffic is automatically switched to the Secondary ISP link. Under normal conditions, all Internet traffic is routed through the Primary ISP.

I would like to monitor the health and availability of the Secondary ISP link even while it is in standby mode. Specifically, I am looking for a method to continuously send ICMP echo requests (ping) through the Secondary ISP path while the Primary ISP remains active.

My goal is to verify that the Secondary ISP link is operational and ready to take over in the event of a failover. If the monitoring ping fails, it should indicate a potential issue with the Secondary ISP connection.

I would appreciate any recommendations or best practices for configuring this type of monitoring on the firewall.