BGP Path Selection Algorithm

Order	Item	Select Rule	Remark
1	PrefVal	Prefer Larger Value	Huawei-specific, valid only on the device where it is configured. Default Value : 0
2	Local Preference	Prefer Larger Value	Default Value : 100
3	Route Type	Aggregate > Summary Automatic > Network > Import > Peer Route
4	AS Path	Prefer Shorter List	“bestroute as-path-ignore” : ignore comparison of AS_Path
5	Origin	IGP>EGP>Incomplete
6	MED	Prefer Lower Value	“bestroute med-none-as-maximum” : treat the MED of routes without MED as maximum 4294967295 “compare-different-as-med” : compare MED of routes come from different AS “deterministic-med”: routes are no longer selected in the sequence in which they are received
7	Peer Type	EBGP>IBGP
8	IGP Cost	Prefer Lower Value	“bestroute igp-metric-ignore” : ignore comparison of IGP Cost
9	Cluster_List	Prefer Shorter List
10	Router ID	Prefer Lower Value	If route has Originator_ID, the comparison of Router ID will be replaced by comparison of Originator_ID “bestroute router-id-ignore” : ignore comparison of Router ID
11	Peer Address	Prefer Lower Value