Sophos XGS - Can not ping WAN Alias IP

Hi Mook Sin Siew

Please check if ARP is getting resolved for all 5 Alias IPs try to add all 5 Alias IPs on the WAN interface 

From SSH run and share the output from option 4.

console> system diagnostics utilities arp ping source <AliasIP> interface PortB <Gateway IP>

Regards

Yup working. May i know is this due to bugs in the firmware?

Thank you for you help. 

Generally, it causes due to ISP router.

It is possible that the ISP gateway may have rebooted automatically and the ARP table on the router is wiped clean. Now at this stage, the XG appliance already have an ARP entry and would not send again.

You would need to follow two steps if necessary to maintain the ARP on the ISP gateway. 

Connect a Common Layer 2 switch in between the WAN interface and ISP connection. If that does not work, Arp bind the MAC address with XG WAN address on the Gateway Router. 

Regards

We were using Sophos UTM and switch to XGS 2 days ago. UTM don't have this issue when assign Alias IP.
So far,  tried to connect to common layer 2 switch in between WAN and IPS connection but does not help.

Can clarify what need to be done for "Arp bind the MAC with XG WAN address on Gateway Router?

Thanks

Mook Sin Siew said:

Can clarify what need to be done for "Arp bind the MAC with XG WAN address on Gateway Router?

Thanks

You need to contact the ISP service provider and request them to make static entries for all Alias IPs on the ISP router.

 Thanks and Regards

Problem solved after ISP make static entry. 

Thank you for your help.  

Problem solved after ISP make static entry. 

Thank you for your help.