Cisco Bug: CSCsy75718 - dhcp-proxy won't reclaim lease with same PPP user on new VAI within 9s
Jan 30, 2017
- Cisco IOS
Known Affected Releases
Symptoms: On a PPP aggregator using dhcp-proxy-client functionality, in a situation where a PPP client session is torn down and then renegotiated within 5 seconds, the DHCP proxy client may send a DHCP RELEASE for the previous DHCP handle after the new DHCP handle (created as a result of new IPCP CONFREQ address 0.0.0.0) has accepted the same IP address allocation from the offnet DHCP Server. This results in the offnet DHCP server having no record of the lease as it exists on the PPP aggregator which causes future addressing conflicts. Conditions: The issue appears to be Day 1, reported on a Cisco 7200/NPE-400 and 7200/NPE-G2 that is running Cisco IOS Release 12.4T, 12.4M, or 12.2SB.
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