Actually, User IP (framed-ip-address) is assigned by NAS and forward the Accouting Start message to SBR (Proxy). SBR select particular Realm based on AcctAttributeMap (APN, User-name attributes) and forward it as end nodes. Two NAS allocates IP address dynamically from the pool 10.8.0.0/13 and 10.16.0.0/13 respectively. At present AcctAttributeMap DO NOT check framed-ip-address value rather it rely on APN and User-name to distinguish realm and forwards it to two different destination (D1, D2). Existing Topology: NAS01 (10.8.0.0/13) -> SBR01 -> D1 and NAS02 (10.16.0.0/13) _-> SBR01 -> D2 Now we need to insert framed-ip-address into consideration as a portion of NAS01 Acct message has to be forwarded to D2 insted of D1 while rest part will follow as it is (i.e. D1). Topology to be Designed: NAS01 (10.8.0.0/13) -> SBR (if targetted IP segment, 10.10.0.0/22) -> D2 NAS01 (10.8.0.0/13) _-> SBR (rest IP of 10.8.0.0/13) -> D1 and NAS02 (10.16.0.0/13) _-> SBR -> D2 _ Thanks, asmash
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