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Cisco Bug: CSCuj80949 - NXOS/OTV: low performance of pktmgr high cpu when continuous arp burst

Last Modified

Feb 01, 2017

Products (7)

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

Known Affected Releases

6.2(2)

Description (partial)

Symptom:
High cpu on pktmgr process (mts-data thread) and consequently drop of ARP packet and slow or no responses for ARP request. This affecting data path traffic as well as remote ARP entries will start time out on local devices, hence traffic will not be sent due to incomplete ARP.

Conditions:
This can happen when OTV unicast mode is used and there is constant rate or constant burst rate of broadcast ARP traffic send from remote sites to ADJ server (approx 1000 arp request per second)
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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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