Sophos XG - HA port & MTU

Question

Hello, 
 
 Just wanted to see if anyone knows if the HA port can run over a standard MTU of 1500 across switches. There is mention that the SG series can be dropped to 100mbp on the HA port to achieve this but nothing about the XG's capabilities. 
 
 Any info would be appreciated.

Thanks, 
 Rich

KingChris · Accepted Answer

Hi Rich5312 Jumbo frames are not supported on the XG on v17.5 or lower versions. This will be supported from v18 and onwards. Now for your query, the XG has been designed to work with HA across geographical distances. However there is a caveat to this. The round trip time must be less than 7 seconds. Anything more and you will have issues forming HA or even keeping the devices from flapping between master/slave roles. You can use this command here: ifconfig down;date;ifconfig up;ping -c 50 -W 1 Please replace "" with the interface being used for HA and replace "" with the slave's HA port IP address. This can be done without the need for configuring HA but you will need to configure the interfaces. As stated, anything more than 7 seconds and you will have issues. I would say a safe number would be a consistent 6 seconds for those 50 packets being sent via the ping command above. Hope this information helps you going forward. Thanks.