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Cisco Bug: CSCur47356 - Incorrect endpoints(over 3000EPs) convergence

Last Modified

Sep 11, 2019

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

11.0(1d)

Description (partial)

Symptom:
1. After node mobility, all EPs on Border-Leaf4 should point to Leaf2. But some of EPs entries still pointed to Leaf1.
<Leaf4 endpoints>
53/cisco:nw1      vxlan-14909417    0011.9400.0a04                       tunnel9 (to leaf2)
53/cisco:nw1      vxlan-14909417    0011.9400.0d81                       tunnel9 (to leaf2)
53/cisco:nw1      vxlan-14909417    0011.9400.0dd7                       tunnel8 (to leaf1) wrong
53/cisco:nw1      vxlan-14909417    0011.9400.0dd8                       tunnel8 (to leaf1) wrong

2. Some entries on Leaf1 didn't bounce.(Not flagged as bounce)
<Leaf1 endpoints>
79/cisco:nw1      vxlan-14909417    0011.9400.09b6 B                     tunnel3
79/cisco:nw1      vxlan-14909417    0011.9400.0a86 B                     tunnel3
79/cisco:nw1      vxlan-14909417    0011.9400.141a                       tunnel3  wrong
79/cisco:nw1      vxlan-14909417    0011.9400.0c13                       tunnel3  wrong

3. It takes several minutes until all 6K EP flows are normal.

Conditions:
[Test Condition]
-6K endpoints(Only MAC address /EP) made by tester. Half of FCS ACI capacity.
-Bidirectional L2 6K flows, 100fps/flow
-Use Flexlink to virtualize node mobility. Shut one of flexlinks on L2SW at the bottom of topology. Then 6K EPs move from Leaf1 to Leaf2(We call it node mobility).

I confirmed the issue when EPs were 3K or 6K. In case of 1K EPs, it doesn't happen.
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