vpp bond with active-backup mode faliure

[BurlyLuo]

vpp# show bond                                                                                                                                                          
interface name   sw_if_index  mode          load balance  active members members
BondEthernet0    3            active-backup active-backup 1              2

vpp# show hardware-interfaces 
              Name                Idx   Link  Hardware
BondEthernet0                      3     up   BondEthernet0
  Link speed: unknown
  Ethernet address 00:0c:29:ff:91:df
ens192                             1     up   ens192
  Link speed: 10 Gbps
  RX Queues:
    queue thread         mode      
    0     vpp_wk_0 (1)   polling   
  Ethernet address 00:0c:29:ff:91:df
  VMware VMXNET3
    carrier up full duplex mtu 9206 
    flags: admin-up pmd maybe-multiseg
    Devargs: 
    rx: queues 1 (max 16), desc 1024 (min 128 max 4096 align 1)
    tx: queues 3 (max 8), desc 1024 (min 512 max 4096 align 1)
    pci: device 15ad:07b0 subsystem 15ad:07b0 address 0000:0b:00.00 numa 0
    max rx packet len: 16384
    promiscuous: unicast off all-multicast on
    vlan offload: strip off filter off qinq off
    rx offload avail:  vlan-strip udp-cksum tcp-cksum tcp-lro vlan-filter 
                       jumbo-frame scatter rss-hash 
    rx offload active: jumbo-frame scatter 
    tx offload avail:  vlan-insert udp-cksum tcp-cksum tcp-tso multi-segs 
    tx offload active: multi-segs 
    rss avail:         ipv4-tcp ipv4 ipv6-tcp ipv6 
    rss active:        none
    tx burst function: vmxnet3_xmit_pkts
    rx burst function: vmxnet3_recv_pkts

    tx frames ok                                        1512
    tx bytes ok                                       159464
    rx frames ok                                       33986
    rx bytes ok                                      7977019
    extended stats:
      rx_good_packets                                  33986
      tx_good_packets                                   1512
      rx_good_bytes                                  7977019
      tx_good_bytes                                   159464
      rx_q0_packets                                    33986
      rx_q0_bytes                                    7977019
      tx_q0_packets                                     1053
      tx_q0_bytes                                     125956                                                                                                            
      tx_q1_packets                                      307
      tx_q1_bytes                                      22330
      tx_q2_packets                                      152
      tx_q2_bytes                                      11178
ens224                             2    down  ens224
  Link speed: 10 Gbps
  RX Queues:
    queue thread         mode      
    0     vpp_wk_1 (2)   polling   
  Ethernet address 00:0c:29:ff:91:df
  VMware VMXNET3
    carrier down 
    flags: pmd maybe-multiseg
    Devargs: 
    rx: queues 1 (max 16), desc 1024 (min 128 max 4096 align 1)
    tx: queues 3 (max 8), desc 1024 (min 512 max 4096 align 1)
    pci: device 15ad:07b0 subsystem 15ad:07b0 address 0000:13:00.00 numa 0
    max rx packet len: 16384
    promiscuous: unicast off all-multicast off
    vlan offload: strip off filter off qinq off
    rx offload avail:  vlan-strip udp-cksum tcp-cksum tcp-lro vlan-filter 
                       jumbo-frame scatter rss-hash 
    rx offload active: jumbo-frame scatter 
    tx offload avail:  vlan-insert udp-cksum tcp-cksum tcp-tso multi-segs 
    tx offload active: multi-segs 
    rss avail:         ipv4-tcp ipv4 ipv6-tcp ipv6 
    rss active:        none
    tx burst function: vmxnet3_xmit_pkts
    rx burst function: vmxnet3_recv_pkts

    tx frames ok                                         971
    tx bytes ok                                       110252
    rx frames ok                                       33636
    rx bytes ok                                      7904315
    extended stats:
      rx_good_packets                                  33636
      tx_good_packets                                    971
      rx_good_bytes                                  7904315
      tx_good_bytes                                   110252
      rx_q0_packets                                    33636
      rx_q0_bytes                                    7904315
      tx_q0_packets                                      797                                                                                                            
      tx_q0_bytes                                      97618
      tx_q1_packets                                        1
      tx_q1_bytes                                         60
      tx_q2_packets                                      173
      tx_q2_bytes                                      12574
local0                             0    down  local0
  Link speed: unknown
  local

all the bond members have the same mac address.
so, the bond can't work well.

[jinshaohui]

mode：active-backup。此模式使用主备策略（热备）。在所有bond的物理网卡中，同一时刻只有一张网卡被激活，当且仅当活动网卡失效时才会激活其他的网卡。这种模式下做bond的两张或多张网卡的MAC地址和Bond虚拟网卡的MAC地址相同，而Bond的MAC地址是Bond创建启动后活动网卡（Active Slave）的MAC地址。这种模式要求主备网卡能快速的切换，即当主网卡出现故障后能迅速地切换至备用网卡。