frr_vrf.md

FRR VRF test lab

Setup linux VRF

export brns="ip netns exec br"

# create VRF inside the_router namespace
$brns ip link add green type vrf table 11
$brns ip link add red type vrf table 10

# up vrf devices
$brns ip link set up green
$brns ip link set up red

Start TheRouter

Router's conf

startup {
  # mbuf mempool size
  sysctl set mbuf 8192

  port 0 mtu 1500 tpid 0x8100 state enabled

  rx_queue port 0 queue 0 lcore 1
  rx_queue port 0 queue 1 lcore 2
  rx_queue port 0 queue 2 lcore 3
}

runtime {
      sysctl set fpm_rt_map 1
  
  # loopback address
  ip addr add 5.5.5.5/32 dev lo

  vif add name v11 port 0 type dot1q cvid 11 flags kni
  ip addr add 10.1.0.1/24 dev v11

  vif add name v12 port 0 type dot1q cvid 12 flags kni
  ip addr add 10.2.0.1/24 dev v12

  vif add name v13 port 0 type dot1q cvid 13 flags kni
  ip addr add 10.3.0.1/24 dev v13

  vif add name v14 port 0 type dot1q cvid 14 flags kni
  ip addr add 10.4.0.1/24 dev v14

  # create additional route tables
  ip route table add green
  ip route table add red

  # create mappings between linux VRF names and router's additional route table names
      # fpm route table map add <linux-route-table-name> rtable <bison-route-table-name> 
  fpm route table map add green rtable green
  fpm route table map add red rtable red

  # create sets containing VIF identificators
  u32set create l2set_green size 4096 bucket_size 16
  u32set create l2set_red size 4096 bucket_size 16

  # create PBR rules
  ip pbr rule add prio 10 u32set l2set_green type "l2" table green
  ip pbr rule add prio 20 u32set l2set_red type "l2" table red

  # fill l2 sets
  l2set add l2set_green port 0 svid 0 cvid 11
  l2set add l2set_green port 0 svid 0 cvid 13

  l2set add l2set_red port 0 svid 0 cvid 12
  l2set add l2set_red port 0 svid 0 cvid 14
}

Router post start script

Note: change MAC addresses

# Enslave L3 interfaces to a VRF device
$brns ip link set up address 68:05:CA:30:61:80 master green dev rkni_v11
$brns ip link set up address 68:05:CA:30:61:80 master green dev rkni_v13
$brns ip link set up address 68:05:CA:30:61:80 master red dev rkni_v12
$brns ip link set up address 68:05:CA:30:61:80 master red dev rkni_v14

FRR bgpd conf

!
! Zebra configuration saved from vty
!   2018/03/14 11:45:56
!
frr version 4.0
frr defaults traditional
!
hostname tr
log syslog
!
!
router bgp 64512 vrf green
 bgp router-id 10.1.0.1
 coalesce-time 1000
 neighbor 10.1.0.2 remote-as 64513
 neighbor 10.1.0.2 update-source 10.1.0.1
 neighbor 10.3.0.2 remote-as 64514
 neighbor 10.3.0.2 update-source 10.3.0.1
!

router bgp 64512 vrf red
 bgp router-id 10.2.0.1
 coalesce-time 1000
 neighbor 10.2.0.2 remote-as 64515
 neighbor 10.2.0.2 update-source 10.2.0.1
 neighbor 10.4.0.2 remote-as 64516
 neighbor 10.4.0.2 update-source 10.4.0.1
!

ip prefix-list pl_norm_nets seq 5 permit 0.0.0.0/0 le 24
!
route-map rm_in permit 10
 match ip address prefix-list pl_norm_nets
!
route-map rm_in deny 20
!
line vty
!

FRR zebra conf

hostname h5

vrf green
vrf red
!

! Turn off welcome messages
no banner motd

log file /var/log/frr/zebra.log

ip route 10.101.0.0/24 Null0 vrf green
ip route 10.102.0.0/24 Null0 vrf red

C1 bgpd conf

!
! Zebra configuration saved from vty
!   2018/03/14 13:36:34
!
frr version 4.0
frr defaults traditional
!
hostname c1
log syslog
!
!
router bgp 64513
 bgp router-id 10.1.0.2
 coalesce-time 1000
 neighbor 10.1.0.1 remote-as 64512
 !
 address-family ipv4 unicast
  network 10.1.1.0/24
 exit-address-family
!
!
line vty
!

C1 zebra conf

hostname c1
!

! Turn off welcome messages
no banner motd

log file /var/log/frr/zebra_c1.log