# 配置物理接口
interfaces <interface_number>
description <interface_desc>
no shutdown
no switchport
speed <interface_speed>
duplex full
no negotiation auto
end

# 配置三层子接口
interface  interface-number.subnumber
description <vlan_description>
encapsulation dot1q <vlanid>
ip address <subinterface_ipaddress> <subinterface_netmask>
bfd interval <value> min_rx <value> multiplier <value> //BFD参数
end

# 设置 eBGP 
router bgp <as_number>
bgp router-id <router_id>
neighbor <bgp_peer_address> remote-as <bgp_peer_as_number>
neighbor <bgp_peer_address> password encrypted <bgp_auth_key>
neighbor <bgp_peer_address> description <bgp_peer_desc>
neighbor <bgp_peer_address> activate
neighbor <bgp_peer_address> fall-over bfd single-hop //设置 BGP 联动 BFD