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Cisco Bug: CSCup05138 - CPU generated traffic being sent to DEST INDEX:0 and dropped after ISSU

Last Modified

Dec 06, 2019

Products (8)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases

6.2(10) 6.2(20) 6.2(6a)

Description (partial) 

Symptom:
CPU generated traffic such as HSRP and ARP getting dropped and not making to the forwarding egress line card.

When capturing  the HSRP or ARP packets via ethanalyzer, we can see it is has set the  NXOS DEST INDEX: 0 as follows.

METMXC2(config)# ethanalyzer local interface inband decode-internal capture-fi "host 10.47.25.4 and host 224.0.0.102" det Capturing on inband NXOS Protocol
    NXOS VLAN: 247
    NXOS SOURCE INDEX: 1054
    NXOS DEST INDEX: 0

Conditions:
HSRP state is Unknown and ARP is incomplete .
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
  • Related Community Discussions
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