Multi-hop Bidirectional Forwarding Detection (BFD) for Border Gateway Protocol (BGP) is introduced in ExtremeXOS 30.5. This enhancement allows BFD support for non-directly connected EBGP as well as IBGP sessions. Hardware assist BFD also supports this feature.
The following command will show "Session type" as "Multi Hop" for Multi-hop BFD:
show bfd session {ipv4 | ipv6} {ipaddress} detail {vr [vrname | all]}
ExtremeSwitching X450-G2, X460-G2, X670-G2, X440-G2, X465, X590, X620, X690, X870 series switches.