cannot ping to alias ip address of portA

very simple the alias has to be in a different IP range.

Ian

Wrong! 
 Alias IP Addresses are usually in the same subnet network. 
The most common issue with having problems on Alias IP addresses is the arp and mac addresses table issues on switches.
Try to run an arp ping from the Sophos Device itself using the cli:

```system diagnostics utilities arp ping source 10.10.1.40 interface PortA 10.10.1.1
```

assuming that the 10.10.1.1 is the host from where you are trying to ping the Alias address.

Thanks I will try again

Thanks I will try again