# 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>
  password encrypted <bgp_auth_key>
  description <bgp_peer_desc>
neighbor <bgp_peer_address> fall-over bfd single-hop //BFD 配置
commit