This value reports the Multi-Exit Discriminator (MED) attribute carried in the route's BGP UPDATE message. Administrators use the MED to understand how a neighboring AS is hinting at a preferred entry point among multiple links, since a lower MED is generally preferred when comparing otherwise-equal paths. For example, two EVPN routes to the same destination from the same neighboring AS but with MEDs of 10 and 100 would lead BGP to prefer the path advertised with the lower MED of 10.