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NSIS Mobility Reality Check Drafts talk about moving extensive state in the network between old and new routing path. Excuse me but what state are we talking about here? Most today routers don’t maintain per node state or per flow state on intermediate routers. Primarily just on the access (first hop) router and firewalls/NAT boxes at border routers. Even future designs for stateful QoS don’t maintain per flow or per node state on most network nodes. RMD (draft-bader-rmd-qos-model-00.txt) specifies per Diffsrv queue state in interior nodes. |