Verify North-South Connectivity and Route Redistribution on a Tier-0 Router

Use the CLI to verify that the BGP routes are learned. You can also check from the external router that the NSX-T Data Center-connected VMs are reachable.

Prerequisites

Verify that BGP is configured. See Configure BGP on a Tier-0 Logical Router in Manager Mode.
Verify that NSX-T Data Center static routes are set to be redistributed. See Enable Route Redistribution on the Tier-0 Logical Router in Manager Mode.

Procedure

View the routes learned from the external BGP neighbor.

nsx-edge1(tier0_sr)> get route bgp

Flags: c - connected, s - static, b - BGP, ns - nsx_static
nc - nsx_connected, rl - router_link, t0n: Tier0-NAT, t1n: Tier1-NAT


b    10.10.10.0/24        [20/0]        via 192.168.100.254

From the external router, check that BGP routes are learned and that the VMs are reachable through the NSX-T Data Center overlay.

List the BGP routes.

user@router# run show ip route bgp
Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,
       I - ISIS, B - BGP, > - selected route, * - FIB route

B>* 172.16.10.0/24 [20/0] via 192.168.100.2, eth2, 00:00:48
B>* 172.16.20.0/24 [20/0] via 192.168.100.2, eth2, 00:00:48
B>* 172.16.30.0/24 [20/0] via 192.168.100.2, eth2, 00:00:48

From the external router, ping the NSX-T Data Center-connected VMs.

ping 172.16.10.10

PING 172.16.10.10 (172.16.10.10) 56(84) bytes of data.
64 bytes from 172.16.10.10: icmp_req=1 ttl=62 time=127 ms
64 bytes from 172.16.10.10: icmp_req=2 ttl=62 time=1.96 ms
^C
--- 172.16.10.10 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 1.966/64.793/127.620/62.827 ms

Check the path through the NSX-T Data Center overlay.

traceroute 172.16.10.10

traceroute to 172.16.10.10 (172.16.10.10), 30 hops max, 60 byte packets
 1  192.168.100.3 (192.168.100.3)  0.640 ms  0.575 ms  0.696 ms
 2  100.91.176.1 (100.91.176.1)  0.656 ms  0.604 ms  0.578 ms
 3  172.16.10.10 (172.16.10.10)  3.397 ms  3.703 ms  3.790 ms

From the internal VMs, ping the external IP address.

ping 10.10.10.10

PING 10.10.10.10 (10.10.10.10) 56(84) bytes of data.
64 bytes from 10.10.10.10: icmp_req=1 ttl=62 time=119 ms
64 bytes from 10.10.10.10: icmp_req=2 ttl=62 time=1.93 ms
^C
--- 10.10.10.10 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 1.936/60.865/119.795/58.930 ms

What to do next

Configure additional routing functionality, such as ECMP.