On the Border Gateway Protocol > Advanced page you can make some additional settings for BGP and you can access BGP debug information windows.
Allow Multiple Autonomous Systems
Allow multiple AS: Select this checkbox if you want to configure multiple AS. This will enable the Systems page, where you can then add multiple AS. At the same time, the BGP System section on the Global page will be disabled, and the Global page will display information for all AS.
Strict IP Address Match
Strict IP address match: Select this checkbox to strictly match IP addresses. Example: 10.0.0.0/8 will only match 10.0.0.0/8, but not 10.0.1.0/24.
Multiple Path Routing
Normally only one route path is used, even if there are multiple routes with the same cost. If selected, up to eight equal routes can be used at the same time. This allows load balancing between multiple interfaces.
Note – The balancing between multiple interfaces only works with neighbors which use the same ASN.
Multiple Path Routing for eBGP: Select this checkbox to activate multiple path routing for eBGP (exterior BGP). eBGP does not need to use the same ASN as the neighbors to load balance between multiple interfaces.
Multiple Path Routing for iBGP: Select this checkbox to activate multiple path routing for iBGP (interior BGP). iBGP needs to use the same ASN as the neighbors to load balance between multiple interfaces.
This section provides access to three debug information windows. Click a button to open a window. The name of a button corresponds to the BGP command you would normally invoke on the command line. The window will then display the result of that command in form of a command line output.
Show IP BGP Neighbor: Displays information on the neighbors of Sophos UTM. Check that the link state for each neighbor is Established.
Show IP BGP Unicast: Displays the current BGP routing table which gives the preferred paths. This is especially useful to get an overview of your metric, weight, and preference settings and their impact.
Show IP BGP Summary: Displays the status of all BGP connections. This information is also displayed in the BGP Summary section on the Global page.