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Cisco Bug: CSCvu80489 - OSPF flapping over Tunnel GRE when adding additional member to a port-channel

Last Modified

Sep 24, 2020

Products (18)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco MDS 9710 Multilayer Director
  • Cisco MDS 9396T 32-Gbps 96-Port Fibre Channel Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco MDS 9148S 16G Multilayer Fabric Switch
  • Cisco MDS 9250i Multiservice Fabric Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco MDS 9396S 16G Multilayer Fabric Switch
  • Cisco Nexus 7000 18-Slot Switch
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Known Affected Releases

7.3(3)D1(1) 8.4(2)

Description (partial)

OSPF flapping over Tunnel GRE when adding additional member to a port-channel

Symptom:
OSPF flapping over Tunnel GRE when adding additional member to a port-channel

interface Ethernet3/1
channel-group 106 mode active

2020 Jun 24 02:28:11 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 10.172.25.42 on Tunnel2282 went DOWN
2020 Jun 24 02:28:11 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 10.18.13.26 on Tunnel1062 went DOWN
2020 Jun 24 02:28:12 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 10.255.255.234 on Tunnel2242 went DOWN
2020 Jun 24 02:28:12 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 172.17.1.74 on Tunnel372 went DOWN
2020 Jun 24 02:28:12 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 192.168.0.14 on Tunnel122 went DOWN
2020 Jun 24 02:28:13 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 192.168.125.10 on Tunnel1692 went DOWN
2020 Jun 24 02:28:13 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 10.32.255.10 on Tunnel1002 went DOWN
2020 Jun 24 02:28:14 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 192.168.0.10 on Tunnel1222 went DOWN
2020 Jun 24 02:28:16 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 10.251.0.74 on Tunnel2092 went DOWN
2020 Jun 24 02:28:16 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 172.16.0.10 on Tunnel2902 went DOWN
2020 Jun 24 02:28:17 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 10.103.95.106 on Tunnel552 went DOWN
2020 Jun 24 02:28:17 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 10.255.0.18 on Tunnel1711 went DOWN
2020 Jun 24 02:28:18 pop %OSPF-5-ADJCHANGE:  ospf-1 [17125]  Nbr 10.230.230.234 on Tunnel2062 went DOWN

Conditions:
Adding an additional member in a port-channel.
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Bug Details Include

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