tests: Fix evpn tests to ensure mac addresses will show up

Locally, the bgp_evpn_vxlan_svd_topo1 and bgp_evpn_vxlan_topo1
tests are failing for me.  Upon inspection the test is looking
for the mac addresses of the interfaces participating in the
evpn bridging on the hosts.  For some reason on my machine
these mac addresses are not in the l2 tables at all on
PE1 or PE2.  Adding quick pings solves the problems.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

2 files changed, 19 insertions, 0 deletions

diff --git a/tests/topotests/bgp_evpn_vxlan_svd_topo1/test_bgp_evpn_vxlan_svd.py b/tests/topotests/bgp_evpn_vxlan_svd_topo1/test_bgp_evpn_vxlan_svd.py
index 8b9631175a..b0f974d0cb 100755
--- a/tests/topotests/bgp_evpn_vxlan_svd_topo1/test_bgp_evpn_vxlan_svd.py
+++ b/tests/topotests/bgp_evpn_vxlan_svd_topo1/test_bgp_evpn_vxlan_svd.py
@@ -231,6 +231,15 @@ def test_pe1_converge_evpn():
     _, result = topotest.run_and_expect(test_func, None, count=45, wait=1)
     assertmsg = '"{}" JSON output mismatches'.format(pe1.name)
 
+    # Let's ensure that the hosts have actually tried talking to
+    # each other.  Otherwise under certain startup conditions
+    # they may not actually do any l2 arp'ing and as such
+    # the bridges won't know about the hosts on their networks
+    host1 = tgen.gears["host1"]
+    host1.run("ping -c 1 10.10.1.56")
+    host2 = tgen.gears["host2"]
+    host2.run("ping -c 1 10.10.1.55")
+
     test_func = partial(
         check_vni_macs_present,
         tgen,
diff --git a/tests/topotests/bgp_evpn_vxlan_topo1/test_bgp_evpn_vxlan.py b/tests/topotests/bgp_evpn_vxlan_topo1/test_bgp_evpn_vxlan.py
index 6561833d6e..8f3cf9cdec 100755
--- a/tests/topotests/bgp_evpn_vxlan_topo1/test_bgp_evpn_vxlan.py
+++ b/tests/topotests/bgp_evpn_vxlan_topo1/test_bgp_evpn_vxlan.py
@@ -164,6 +164,15 @@ def test_pe1_converge_evpn():
     _, result = topotest.run_and_expect(test_func, None, count=45, wait=1)
     assertmsg = '"{}" JSON output mismatches'.format(pe1.name)
 
+    # Let's ensure that the hosts have actually tried talking to
+    # each other.  Otherwise under certain startup conditions
+    # they may not actually do any l2 arp'ing and as such
+    # the bridges won't know about the hosts on their networks
+    host1 = tgen.gears["host1"]
+    host1.run("ping -c 1 10.10.1.56")
+    host2 = tgen.gears["host2"]
+    host2.run("ping -c 1 10.10.1.55")
+
     test_func = partial(
         check_vni_macs_present,
         tgen,
@@ -171,6 +180,7 @@ def test_pe1_converge_evpn():
         101,
         (("host1", "host1-eth0"), ("host2", "host2-eth0")),
     )
+
     _, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
     if result:
         logger.warning("%s", result)