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Cisco Bug: CSCum96583 - ISG does not respond to Discover after roaming in Selecting state

Last Modified

Mar 29, 2019

Products (17)

  • Cisco IOS
  • Cisco ME 3600X-24TS-M Switch
  • Cisco 7301 Router
  • Cisco 7206 Router
  • Cisco 7206VXR Router
  • Cisco 7204 Router
  • Cisco 7202 Router
  • Cisco 7600 Series Route Switch Processor 720 with Multilayer Switch Feature Card
  • Cisco ME 3600X-24FS-M Switch
  • Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks
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Known Affected Releases


Description (partial)

ISG doesn't allocate to a client after interface roaming.
Here is the scenario.

1. A clinet sends DHCP Discover and ISG sends an Offer to the client. The binding is in Selecting state.
2. But some reason the Offer doesn't reach to the client.
3. The client moves to another interface.
4. Since the client doesn't receive the Offer, the client sends DHCP Discover to the ISG on the new port.
5. ISG ignores the DHCP Discover until the old binding is timed out.

Matches the above scenario.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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