VRF routing support

VRF supports static routing, OSPF, and BGP. Other routing protocols require using VDOMs.

BGP

In this example, BGP is used to update the VRF that it is neighbors with.

The hub is configured with two neighbors connected to two interfaces. The branches are configured to match the hub, with branch networks configured to redistribute into BGP.

Policies must be created on the hub and branches to allow traffic between them.

To configure the hub:

config router bgp
    set as 65000
    config neighbor
        edit "10.101.101.2"
            set soft-reconfiguration enable
            set interface "port2"
            set remote-as 65101
            set update-source "port2"
        next
        edit "10.102.102.2"
            set soft-reconfiguration enable
            set interface "port3"
            set remote-as 65102
            set update-source "port3"
        next
    end
end

To configure branch 101:

config router bgp
    set as 65101
    config neighbor
        edit "10.101.101.1"
            set soft-reconfiguration enable
            set interface "port2"
            set remote-as 65000
            set update-source "port2"
        next
    end
    config redistribute connected
        set status enable
    end
end

To configure branch 102:

config router bgp
    set as 65102
    config neighbor
        edit "10.102.102.1"
            set soft-reconfiguration enable
            set interface "port2"
            set remote-as 65000
            set update-source "port2"
        next
    end
    config redistribute connected
        set status enable
    end
end

To verify the BGP neighbors and check the routing table on the hub:

# get router info bgp summary
BGP router identifier 192.168.0.1, local AS number 65000
BGP table version is 2
2 BGP AS-PATH entries
0 BGP community entries

Neighbor 		V	AS		MsgRcvd	MsgSent	TblVer	InQ	OutQ Up/Down	State/PfxRcd
10.101.101.2	4	65101		4		4		2		0	0	00:01:05	3
10.102.102.2	4	65102		3		3		1		0	0	00:00:30	3

Total number of neighbors 2

# get router info routing-table all
Routing table for VRF=0
Codes (…)
S*	0.0.0.0/0 [10/0] via 192.168.0.254, port1
C	10.101.101.0/24 is directly connected, port2
C	10.102.102.0/24 is directly connected, port3
C	192.168.0.0/24 is directly connected, port1
B	192.168.101.0/24 [20/0] via 10.101.101.2, port2, 00:01:25
B	192.168.102.0/24 [20/0] via 10.102.102.2, port3, 00:00:50

To configure VRF on the hub:

1. Put the interfaces into VRF:

   config system interface
       edit port2
           set vrf 10
       next
       edit port3
           set vrf 20
       next
   end
   

2. Restart the router to reconstruct the routing tables:

   # execute router restart

3. Check the routing tables:

   # get router info routing-table all
   Routing table for VRF=0
   Codes (…)
   S*	0.0.0.0/0 [10/0] via 192.168.0.254, port1
   C	192.168.0.0/24 is directly connected, port1
   
   Routing table for VRF=10
   C	10.101.101.0/24 is directly connected, port2
   B	192.168.101.0/24 [20/0] via 10.101.101.2, port2, 00:02:25
   
   Routing table for VRF=20
   C	10.102.102.0/24 is directly connected, port3
   B	192.168.102.0/24 [20/0] via 10.102.102.2, port2, 00:01:50
   

4. Check the BGP summary:

   # get router info bgp summary
   
   VRF 10 BGP router identifier 10.101.101.1, local AS number 65000
   BGP table version is 1
   2 BGP AS-PATH entries
   0 BGP community entries
   
   Neighbor 		V	AS		MsgRcvd	MsgSent	TblVer	InQ	OutQ Up/Down	State/PfxRcd
   10.101.101.2	4	65101		4		4		2		0	0	00:02:05	3
   
   Total number of neighbors 1
   
   VRF 10 BGP router identifier 10.101.101.1, local AS number 65000
   BGP table version is 1
   2 BGP AS-PATH entries
   0 BGP community entries
   
   Neighbor 		V	AS		MsgRcvd	MsgSent	TblVer	InQ	OutQ Up/Down	State/PfxRcd
   10.102.102.2	4	65102		3		3		1		0	0	00:01:30	3
   
   Total number of neighbors 1
   

OSPF

OSPF routes in VRFs work the same as BGP: the interface that OSPF is using is added to the VRF.

To configure the hub:

1. Configure OSPF:

   config router ospf
       set router-id 1.1.1.1
       config area
           edit 0.0.0.0
           next
       end
       config ospf-interface
           edit Branch101
               set interface “port2”
               set dead-interval 40
               set hello-interval 10
           next
           edit Branch102
               set dead-interval 40
               set hello-interval 10
           next
       end
       config network
           edit 0
               set prefix 10.101.101.0 255.255.255.0
           next
           edit 0
               set prefix 10.102.102.0 255.255.255.0
           next
           edit 0
               set prefix 192.168.1.0 255.255.255.0
           next
       end
   end

2. Put the interfaces into VRF:

   config system interface
       edit port2
           set vrf 10
       next
       edit port3
           set vrf 20
       next
   end
   

To configure branch 101:

config router ospf
    set router-id 101.101.101.101
    config area
        edit 0.0.0.0
        next
    end
    config ospf-interface
        edit HUB
            set interface port2
            set dead-interval 40
            set hello-interval 10
        next
    end
    config network
        edit 0
            set prefix 10.101.101.0 255.255.255.0
        next
        edit 0
            set prefix 192.168.101.0 255.255.255.0
        next
    end
end

To check the routing table and OSPF summary:

# get router info routing-table ospf

# get router info ospf interface