Border Gateway Protocol (BGP) Parameters 2012-12-19 1-63 IETF Review 64-127 First Come First Served 128-255 Reserved for Private Use IANA does not assign 0 Reserved 1 Multiprotocol Extensions for BGP-4 2 Route Refresh Capability for BGP-4 3 Outbound Route Filtering Capability 4 Multiple routes to a destination capability 5 Extended Next Hop Encoding 6-63 Unassigned 64 Graceful Restart Capability 65 Support for 4-octet AS number capability 66 Deprecated (2003-03-06) 67 Support for Dynamic Capability (capability specific) 68 Multisession BGP Capability 69 ADD-PATH Capability 70 Enhanced Route Refresh Capability 71-127 Unassigned 128-255 Reserved for Private Use