Possible duplicate IP addresses issued by ACS1113

Unanswered Question
Sep 9th, 2008


has anyone seen an acs server issuing duplicate ip addresses

is there any way to list the IP allocation to check if duplicates have been issued?

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smahbub Wed, 09/17/2008 - 08:30

Address assignment from IP pools is based on Accounting Start and Stop records. A duplicate IP address might be assigned to a user if an Accounting Stop packet is received out of order following a new access request by the same user.

If ACS receives a late Stop packet, it might erroneously mark an IP address as free, even though it has just been assigned. That might lead to a duplicate address assignment during the next connection.Such situations can happen in DSL environments where a router starts new PPP connections in less than 1 second after a previous disconnection


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