(Optional) The items configured in the preceding sections of this chapter in OMNI may be verified using the leaf switch CLI.
Verify routing configurations in OMNI
The routing configurations required for BGP peering from the NSX-T Edge nodes to the leaf switches is all automated. OMNI reads the configurations that were made in the Tier-0 router in NSX-T and makes the associated configurations on the fabric.
This can be verified by going to the networking tab in OMNI and then selecting the routing submenu as shown in the figure below.
show running configuration interface vlan vlan_id
The show running configuration interface vlan vlan_id command is used to confirm the IP addresses, virtual addresses, and IP helper-address are properly configured on the leaf switches for the host overlay, edge overlay, and uplink VLANs.
The host overlay network, VLAN 2500 in this example, exists on all four leaf switches. Example output from Leaf1A is shown below. The output on Leaf1B is similar.
Leaf1A# show running-configuration interface vlan 2500 ! interface vlan2500 description vlan2500 no shutdown ip address 172.25.101.253/24 ip helper-address 172.19.11.50 no ip igmp snooping no ipv6 mld snooping ! vrrp-group 2 virtual-address 172.25.101.254
Example output from Leaf2A is shown below. The output on Leaf2B is similar.
Leaf2A# show running-configuration interface vlan 2500 ! interface vlan2500 description vlan2500 no shutdown ip address 172.25.102.253/24 no ipv6 mld snooping no ip igmp snooping ip helper-address 172.19.11.50 ! vrrp-group 1 virtual-address 172.25.102.254
The edge overlay network, VLAN 2713 in this example, exists on the leaf switches in Rack 1. Example output from Leaf1A is shown below. The output on Leaf1B is similar.
Leaf1A# show running-configuration interface vlan 2713 ! interface vlan2713 description vlan2713 no shutdown ip address 172.27.13.252/24 no ip igmp snooping no ipv6 mld snooping ! vrrp-group 3 virtual-address 172.27.13.254
The uplink networks exist on the leaf switches in Rack 1. This is VLAN 2711 on Leaf1A and VLAN 2712 on Leaf1B.
Leaf1A# show running-configuration interface vlan 2711
!
interface vlan2711
description vlan2711
no shutdown
ip address 172.27.11.1/24
no ipv6 mld snooping
no ip igmp snooping
Leaf1B# show running-configuration interface vlan 2712
!
interface vlan2712
description vlan2712
no shutdown
ip address 172.27.12.1/24
no ipv6 mld snooping
no ip igmp snooping
show ip bgp summary
Run the show ip bgp summary command on the border leafs, Leaf1A and Leaf1B, to verify BGP is up between the leaf switches and the NSX Edge Tier-0 gateway. The Tier-0 gateway connections are underlined.
Leaf1A# show ip bgp summary BGP router identifier 172.16.128.0 local AS number 65011 Neighbor AS MsgRcvd MsgSent Up/Down State/Pfx 172.16.0.0 65011 3439 3436 2d:01:22:55 28 172.16.0.3 65012 3435 3450 2d:01:31:00 17 172.16.0.7 65012 3435 3455 2d:01:31:00 17 172.27.11.2 65003 429 489 00:27:19 6 172.27.11.3 65003 398 463 00:26:09 6 192.168.1.0 65101 3429 3439 2d:01:31:46 8 192.168.2.0 65101 3431 3438 2d:01:31:46 8 Leaf1B# show ip bgp summary BGP router identifier 172.16.128.1 local AS number 65011 Neighbor AS MsgRcvd MsgSent Up/Down State/Pfx 172.16.0.1 65011 3419 3432 2d:01:26:11 28 172.16.0.5 65012 3422 3420 2d:01:25:36 28 172.16.0.9 65012 3423 3436 2d:01:25:28 28 172.27.12.2 65003 448 525 00:29:17 13 172.27.12.3 65003 446 514 00:29:11 13 192.168.1.2 65101 3416 3422 2d:01:26:09 8 192.168.2.2 65101 3419 3415 2d:01:26:09 8
Verify BGP route propagation
To verify BGP has propagated routes from the Tier-1 gateway to the SmartFabric switches, run the show ip route command at the CLI of one of the leaf switches. The underlined output confirms the routes to the NSX-T tenant segments have been learned using BGP.
The following output is from Leaf1A. The command output from the other leafs and spines in the fabric will also have two routes to the tenant segments learned using BGP.
Leaf1A# show ip route Codes: C - connected S - static B - BGP, IN - internal BGP, EX - external BGP O - OSPF, IA - OSPF inter area, N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2, E1 - OSPF external type 1, E2 - OSPF external type 2, * - candidate default, + - summary route, > - non-active route Gateway of last resort is not set Destination Gateway Dist/Metric Last Change ----------------------------------------------------------------------------------------- B EX 10.0.2.1/32 via 192.168.1.0 20/0 3 days 18:33:56 B EX 10.0.2.2/32 via 192.168.2.0 20/0 3 days 18:33:48 B EX 10.10.10.0/24 via 172.27.11.2 20/0 3 days 18:33:21 via 172.27.11.3 B EX 10.10.20.0/24 via 172.27.11.2 20/0 3 days 18:33:21 via 172.27.11.3 (output truncated)
Note: The full output for the show ip route command on Leaf1A is shown in the show ip route section in Show Command Output.
The external switches are configured in this deployment per Dell EMC Networking SmartFabric Services Deployment with VxRail. The underlined output below confirms the external switches have learned the routes to the app and web networks using BGP from the SmartFabric switches.
The following output is from External-A. The command output on External-B will also have two routes to the tenant segments learned using BGP.
External-A# show ip route Codes: C - connected S - static B - BGP, IN - internal BGP, EX - external BGP O - OSPF, IA - OSPF inter area, N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2, E1 - OSPF external type 1, E2 - OSPF external type 2, * - candidate default, + - summary route, > - non-active route Gateway of last resort is not set Destination Gateway Dist/Metric Last Change ----------------------------------------------------------------------------------------- C 10.0.2.1/32 via 10.0.2.1 loopback0 0/0 3 days 01:56:32 B IN 10.0.2.2/32 via 192.168.3.21 200/0 3 days 01:56:07 B EX 10.10.10.0/24 via 192.168.1.1 20/0 21:04:21 via 192.168.1.3 B EX 10.10.20.0/24 via 192.168.1.1 20/0 21:04:21 via 192.168.1.3 B EX 172.18.11.0/24 via 192.168.1.1 20/0 2 days 21:58:01 via 192.168.1.3 C 172.19.11.0/24 via 172.19.11.252 vlan1911 0/0 3 days 01:56:12 (output truncated)