s6850-56HF 接入交换机的这段配置是什么意思

bgp 4200001005

 bgp update-delay on-startup 120

 default-route update-first

 router-id 10.33.240.5

 bestroute compare-med

 peer 10.33.129.9 route-update-interval 0

 peer 10.33.129.9 timer keepalive 1 hold 3

 peer 10.33.129.9 route-policy Policy-ASW-EBGP-Egress export

peer 10.33.128.157 advertise-community

 peer 10.33.128.157 advertise-ext-community

route-policy Policy-ASW-EBGP-Egress permit node 10

 if-match tag 3000

#

route-policy Policy-ASW-EBGP-Egress permit node 20

 if-match ip address prefix-list Prefix-Loopback0

#              

route-policy Policy-ASW-EBGP-Egress deny node 100

#

route-policy Policy-Import-Route-StaticToBGP permit node 10

 if-match tag 3000

#

 ip prefix-list Prefix-Loopback0 index 10 permit 10.33.240.5 32

 ip prefix-list Prefix-Loopback0 index 20 permit 10.33.240.6 32

#

 ip community-list basic Community-HOST permit 10:10

 ip community-list basic Community-HOST permit 10:20

ip route-static 10.32.2.0 23 NULL0 tag 3000 description RSW-Connect-Subnet

 ip route-static 10.64.1.0 24 NULL0 tag 3000 description OPS-Subnet

 ip route-static 10.65.1.0 24 NULL0 tag 3000 description BigData-Subnet

 ip route-static 10.66.1.0 24 NULL0 tag 3000 description DB-Subnet

 ip route-static 10.69.1.0 24 NULL0 tag 3000 description Test-Subnet

 ip route-static 10.70.1.0 24 NULL0 tag 3000 description Pre-Subnet

 ip route-static vpn-instance Management 0.0.0.0 0 M-GigabitEthernet0/0/0 10.16.0.129