VRF in FRR

Owned by Jean-luc KRIKER
Last updated: Sept 08, 2022
8 min read


configuration

show running-config 
lr202007009846# show running-config
Building configuration...

Current configuration:
!
frr version 8.2.2
frr defaults traditional
hostname lr202007009846
log file /var/log/128technology/routing/routingEngine.log informational
no ip forwarding
no ipv6 forwarding
!
ip route 192.168.192.0/30 g15
!
router bgp 65101
 bgp router-id 192.168.111.1
 bgp log-neighbor-changes
 no bgp ebgp-requires-policy
 bgp graceful-restart preserve-fw-state
 bgp bestpath compare-routerid
 timers bgp 30 90
 neighbor 192.168.111.2 remote-as 65102
 neighbor 192.168.111.2 ebgp-multihop 5
 neighbor 192.168.111.2 update-source loopback0
 neighbor 192.168.111.2 advertisement-interval 30
 neighbor 192.168.111.2 timers connect 30
 !
 address-family ipv4 unicast
  redistribute connected
  neighbor 192.168.111.2 next-hop-self
  neighbor 192.168.111.2 soft-reconfiguration inbound
 exit-address-family
exit
!
. . . 
!
ip prefix-list only_static_routes seq 1 permit 1.0.0.1/32
!
route-map allow_prefix_1001 permit 1
 match ip address prefix-list only_static_routes
exit
!
end
lr202007009846#
VRF part


show running-config
router bgp 65110 vrf VRF-11
 bgp log-neighbor-changes
 no bgp ebgp-requires-policy
 bgp graceful-restart preserve-fw-state
 bgp bestpath compare-routerid
 timers bgp 30 90
 neighbor 10.100.11.2 remote-as 65111
 neighbor 10.100.11.2 advertisement-interval 30
 neighbor 10.100.11.2 timers connect 30
 !
 address-family ipv4 unicast
  redistribute kernel
  neighbor 10.100.11.2 soft-reconfiguration inbound
  maximum-paths 1
  maximum-paths ibgp 1
 exit-address-family
exit
!
router bgp 65110 vrf VRF-11-clone
 bgp log-neighbor-changes
 no bgp ebgp-requires-policy
 bgp graceful-restart preserve-fw-state
 bgp bestpath compare-routerid
 timers bgp 30 90
 neighbor 10.100.11.2 remote-as 65111
 neighbor 10.100.11.2 advertisement-interval 30
 neighbor 10.100.11.2 timers connect 30
 !
 address-family ipv4 unicast
  redistribute kernel
  neighbor 10.100.11.2 soft-reconfiguration inbound
  maximum-paths 1
  maximum-paths ibgp 1
 exit-address-family
exit
!
show commands

show vrf
lr202007009846# show vrf
vrf VRF-11 id 2 table 16384
vrf VRF-11-clone id 3 table 16385

show rib vrf xxxxxxxx
lr202007009846# show rib vrf VRF-11
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
       f - OpenFabric,
       > - selected route, * - FIB route, q - queued, r - rejected, b - backup
       t - trapped, o - offload failure

VRF VRF-11:
C>* 10.100.11.0/24 is directly connected, g22, 20:32:08
K>* 10.100.12.0/24 [254/1000000] unreachable (blackhole), 20:36:32
C>* 10.100.110.1/32 is directly connected, lo0-1, 20:37:26
B>* 10.100.110.11/32 [20/0] via 10.100.11.2, g22, weight 1, 20:32:06




lr202007009846# show rib vrf VRF-11-clone
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
       f - OpenFabric,
       > - selected route, * - FIB route, q - queued, r - rejected, b - backup
       t - trapped, o - offload failure

VRF VRF-11-clone:
C>* 10.100.11.0/24 is directly connected, g23, 20:32:13
K>* 10.100.12.0/24 [254/1000000] unreachable (blackhole), 20:36:37
C>* 10.100.110.1/32 is directly connected, lo0-2, 20:37:31
B>* 10.100.110.11/32 [20/0] via 10.100.11.2, g23, weight 1, 20:32:11
lr202007009846#



show bgp vrf VRF-11 ipv4 wide

show bgp vrf
lr202007009846# show bgp vrf VRF-11 ipv4 wide
BGP table version is 2, local router ID is 10.100.110.1, vrf id 2
Default local pref 100, local AS 65110
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

   Network                                      Next Hop                                  Metric LocPrf Weight Path
*> 10.100.12.0/24                               0.0.0.0                                  1000000         32768 ?
*> 10.100.110.11/32                             10.100.11.2                                                  0 65111 i

Displayed  2 routes and 2 total paths
lr202007009846#

show bgp vrf VRF-11 ipv4 neighbors

show bgp vrf
lr202007009846# show bgp vrf VRF-11 ipv4 neighbors
BGP neighbor is 10.100.11.2, remote AS 65111, local AS 65110, external link
  BGP version 4, remote router ID 10.100.110.1, local router ID 10.100.110.1
  BGP state = Established, up for 6d23h58m
  Last read 00:00:13, Last write 00:00:10
  Hold time is 90, keepalive interval is 30 seconds
  Configured hold time is 90, keepalive interval is 30 seconds
  Neighbor capabilities:
    4 Byte AS: advertised and received
    Extended Message: advertised
    AddPath:
      IPv4 Unicast: RX advertised
    Long-lived Graceful Restart: advertised and received
      Address families by peer:
    Route refresh: advertised and received(old & new)
    Enhanced Route Refresh: advertised
    Address Family IPv4 Unicast: advertised and received
    Hostname Capability: advertised (name: lr202007009846,domain name: n/a) not received
    Graceful Restart Capability: advertised and received
      Remote Restart timer is 120 seconds
      Address families by peer:
        none
  Graceful restart information:
    End-of-RIB send: IPv4 Unicast
    End-of-RIB received: IPv4 Unicast
    Local GR Mode: Helper*
    Remote GR Mode: Helper
    R bit: False
    Timers:
      Configured Restart Time(sec): 120
      Received Restart Time(sec): 120
    IPv4 Unicast:
      F bit: False
      End-of-RIB sent: Yes
      End-of-RIB sent after update: Yes
      End-of-RIB received: Yes
      Timers:
        Configured Stale Path Time(sec): 360
  Message statistics:
    Inq depth is 0
    Outq depth is 0
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                3          2
    Keepalives:         20157      22313
    Route Refresh:          0          0
    Capability:             0          0
    Total:              20161      22316
  Minimum time between advertisement runs is 30 seconds

 For address family: IPv4 Unicast
  Update group 3, subgroup 3
  Packet Queue length 0
  Inbound soft reconfiguration allowed
  Community attribute sent to this neighbor(all)
  1 accepted prefixes

  Connections established 1; dropped 0
  Last reset 01w0d00h,  No AFI/SAFI activated for peer
Local host: 10.100.11.1, Local port: 179
Foreign host: 10.100.11.2, Foreign port: 49434
Nexthop: 10.100.11.1
Nexthop global: ::
Nexthop local: ::
BGP connection: shared network
BGP Connect Retry Timer in Seconds: 30
Estimated round trip time: 111 ms
Read thread: on  Write thread: on  FD used: 52


lr202007009846#



show bgp vrf VRF-11 neighbors 10.100.11.2 advertised-routes

show bgp vrf VRF-11 ipv4 neighbors 10.100.11.2 received-routes

advertised and received routes
lr202007009846# show bgp vrf VRF-11 neighbors 10.100.11.2 advertised-routes
  <cr>
  json       JavaScript Object Notation
  route-map  Route-map to modify the attributes
  wide       Increase table width for longer prefixes
lr202007009846# show bgp vrf VRF-11 ipv4 neighbors 10.100.11.2 advertised-routes
BGP table version is 2, local router ID is 10.100.110.1, vrf id 2
Default local pref 100, local AS 65110
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

   Network          Next Hop            Metric LocPrf Weight Path
*> 10.100.12.0/24   0.0.0.0            1000000         32768 ?
*> 10.100.110.11/32 0.0.0.0                                0 65111 i

Total number of prefixes 2



lr202007009846# show bgp vrf VRF-11 ipv4 neighbors 10.100.11.2 received-routes
BGP table version is 2, local router ID is 10.100.110.1, vrf id 2
Default local pref 100, local AS 65110
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

   Network          Next Hop            Metric LocPrf Weight Path
*> 10.100.110.11/32 10.100.11.2                            0 65111 i

Total number of prefixes 1
lr202007009846#