Route leaking not working

[lledidga]

I want to create communication btw vrf1 to vrf2 using the route leaking feature.

vrf1: 10.55.51.12/32  -  destination reachable through default route -next hop 192.168.246.253-

vrf2: 10.50.18.65/27  - ve 1101

Using below commands, communication does not work as expected

vrf vrf1
address-family ipv4 unicast
ip route 10.50.18.64/27 next-hop-vrf vrf2 10.50.18.65

vrf vrf2
address-family ipv4 unicast
ip route 10.55.51.12/32 next-hop-vrf vrf1 192.168.246.253

I'm assuming next hops are correct, please let me know if somebody has faced a similar issue, or if I'm using an incorrect input for this route leaking.

[Michael_Morey]

Hello,

Thank you for your question.  Did you confirm that the source interfaces are UP/UP?  If so, we would want to see more of your config.

In my lab I tested with an SLX 9250 running SLX-OS 20.5.1:

POD1-Leaf-1# show chassis
Chassis Name: SLX9250-32C

POD1-Leaf-1# show version
SLX-OS Operating System Version: 20.5.1

First I created 2 VRF named green and blue:

POD1-Leaf-1# conf
Entering configuration mode terminal
POD1-Leaf-1(config)# vrf green
POD1-Leaf-1(config-vrf-green)# address-family ipv4 uni
POD1-Leaf-1(config-vrf-green-ipv4-unicast)# vrf blue
POD1-Leaf-1(config-vrf-blue)# address-family ipv4 uni

I then picked two random free interfaces and configured them for VRF forwarding:

POD1-Leaf-1(config-vrf-blue-ipv4-unicast)# int e 0/9
POD1-Leaf-1(conf-if-eth-0/9)# vrf forwarding green
POD1-Leaf-1(conf-if-eth-0/9)# ip address 10.55.1.2/24
POD1-Leaf-1(conf-if-eth-0/9)# int e 0/10
POD1-Leaf-1(conf-if-eth-0/10)# vrf forwarding blue
POD1-Leaf-1(conf-if-eth-0/10)# ip address 10.50.1.2/24
POD1-Leaf-1(conf-if-eth-0/10)# end

Next I configured the basic Static Route Leaking as described in the L3 Configuration Guide:

POD1-Leaf-1(config)# vrf blue
POD1-Leaf-1(config-vrf-blue)# address-family ipv4 uni
POD1-Leaf-1(config-vrf-blue-ipv4-unicast)# ip route 10.55.2.0/24 next-hop-vrf green 10.55.1.1
POD1-Leaf-1(config-vrf-blue-ipv4-unicast)# vrf green
POD1-Leaf-1(config-vrf-green)# address-family ipv4 uni
POD1-Leaf-1(config-vrf-green-ipv4-unicast)# ip route 10.50.2.0/24 next-hop-vrf blue 10.50.1.1
POD1-Leaf-1(config-vrf-green-ipv4-unicast)# end
POD1-Leaf-1# 

However I see no routes were learned:

POD1-Leaf-1# show ip route vrf green
Total number of IP routes: 0
POD1-Leaf-1# show ip route vrf blue
Total number of IP routes: 0

I found that both ports were down, so I moved the config to two ports that were free and UP:

POD1-Leaf-1# show int e 0/9
Ethernet 0/9 is up, line protocol is down (link protocol down)
POD1-Leaf-1# show int e 0/10
Ethernet 0/10 is up, line protocol is down (link protocol down)

Eth 0/15:1   connected (up)  --         25G      100G                                
Eth 0/15:2   connected (up)  --         25G      100G                                

POD1-Leaf-1# conf
Entering configuration mode terminal
POD1-Leaf-1(config)# int e 0/9
POD1-Leaf-1(conf-if-eth-0/9)# no vrf forwarding 
POD1-Leaf-1(conf-if-eth-0/9)# int e 0/10
POD1-Leaf-1(conf-if-eth-0/10)# no vrf forwarding 

POD1-Leaf-1(conf-if-eth-0/10)# int e 0/15:1
POD1-Leaf-1(conf-if-eth-0/15:1)# vrf forwarding green
POD1-Leaf-1(conf-if-eth-0/15:1)#  ip address 10.55.1.2/24
POD1-Leaf-1(conf-if-eth-0/15:1)#  no shutdown
POD1-Leaf-1(conf-if-eth-0/15:1)# int e 0/15:2           
POD1-Leaf-1(conf-if-eth-0/15:2)#  vrf forwarding blue
POD1-Leaf-1(conf-if-eth-0/15:2)#  ip address 10.50.1.2/24
POD1-Leaf-1(conf-if-eth-0/15:2)#  no shutdown
POD1-Leaf-1(conf-if-eth-0/15:2)# end

Now I see routes leaking as expected as we see the route learned from %green in blue and vice versa:

POD1-Leaf-1# show ip route vrf blue
IP Routing Table for VRF "blue"
Total number of IP routes: 3
'[x/y]' denotes [preference/metric]

10.50.1.0/24, attached 
     via DIRECT, Eth 0/15:2, [0/0], 0m7s, direct, tag 0
10.50.1.2/32, attached 
     via DIRECT, Eth 0/15:2, [0/0], 0m7s, local, tag 0
10.55.2.0/24,  
     via 10.55.1.1%green, Eth 0/15:1, [1/1], 0m18s, static, tag 0

POD1-Leaf-1# show ip route vrf green
IP Routing Table for VRF "green"
Total number of IP routes: 3
'[x/y]' denotes [preference/metric]

10.50.2.0/24,  
     via 10.50.1.1%blue, Eth 0/15:2, [1/1], 0m12s, static, tag 0
10.55.1.0/24, attached 
     via DIRECT, Eth 0/15:1, [0/0], 0m23s, direct, tag 0
10.55.1.2/32, attached 
     via DIRECT, Eth 0/15:1, [0/0], 0m23s, local, tag 0
POD1-Leaf-1# 

 Thanks,