set interfaces bridge br0 address '10.1.1.2/30'
set interfaces bridge br0 member interface veth0

set interfaces virtual-ethernet veth0 peer-name 'veth10'
set interfaces virtual-ethernet veth10 address '10.1.1.1/30'
set interfaces virtual-ethernet veth10 peer-name 'veth0'
set interfaces virtual-ethernet veth10 vrf 'bgp'

set protocols bgp system-as '65001'
set vrf name bgp protocols bgp neighbor 10.1.1.2 address-family ipv4-unicast
set vrf name bgp protocols bgp neighbor 10.1.1.2 port '1790'
set vrf name bgp protocols bgp neighbor 10.1.1.2 remote-as '65001'
set vrf name bgp protocols bgp system-as '65001'
set vrf name bgp table '1010'

commit

set vrf name bgp protocols bgp neighbor 10.1.1.2 address-family ipv4-flowspec
commit

Traceback (most recent call last):
  File "/usr/libexec/vyos/conf_mode/protocols_bgp.py", line 594, in <module>
    apply(c)
  File "/usr/libexec/vyos/conf_mode/protocols_bgp.py", line 585, in apply
    frr_cfg.commit_configuration(bgp_daemon)
  File "/usr/lib/python3/dist-packages/vyos/frr.py", line 482, in commit_configuration
    raise ConfigurationNotValid(f'Config commit retry counter ({count_max}) exceeded for {daemon} dameon!')
vyos.frr.ConfigurationNotValid: Config commit retry counter (5) exceeded for bgpd dameon!

cont t
  router bgp 65001 vrf bgp
  address-family ipv4 flowspec



r4# conf t
r4(config)# router bgp 65001 vrf bgp
r4(config-router)#  address-family ipv4 flowspec 
  <cr>  
r4(config-router)#  address-family ipv4 flowspec 
Only Unicast/Multicast/EVPN SAFIs supported in non-core instances.
r4(config-router)#