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Cisco Bug: CSCtc56075 - Cat 6500 12.2(33)SXH4ARP/CEF issue:Random Ip addresses lose connectivity

Last Modified

Sep 22, 2015

Products (17)

  • Cisco IOS
  • Cisco Catalyst 6500 Series Virtual Switching Supervisor Engine 720 with 10GE uplinks
  • Cisco Products
  • Cisco 10720 Router
  • Cisco Catalyst 6500 Supervisor Engine 32 PISA
  • Cisco Catalyst 6500 Series Supervisor Engine 2
  • Cisco 7600 Series Supervisor Engine 2 with Multilayer Switch Feature Card
  • Cisco Catalyst 6000 Series Multilayer Switch Feature Card 3 (MSFC3)
  • Cisco Catalyst 6500 Series Supervisor Engine 32 / MSFC2A
  • Cisco Catalyst 6513 Switch
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Known Affected Releases


Description (partial)

Random Hosts lose connectivity with other devices on the network. The destination devices are reachable from other devices in the network. Clearing the arp entries on the Hosts does not resolve the issue.

Clearing the ARP cache on the Catalyst6500 that does the Inter vlan routing restores the connectivity. 
Changing the Arp timer on the Catalyst6500 that does the intervlan routing  to 300 stops the issue from recurring in the network.
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Bug Details Include

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  • Status
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