Internet Route Scaling

Internet route scaling (OptiScale™ for Internet Routing) helps to ensure reachability for all networks in the internet routing table and eliminates unnecessary table entries.

OptiScale creates an enhanced route scale profile using the following methods:

FIB (Forwarding Information Base) optimization: Protocol routes are downloaded to the RIB (Routing Information Base), which then downloads them to the FIB. Initial route optimization eliminates redundant next-hop entries.
Hardware table optimization: Routes with common prefixes are stored in separate tables. The Longest Exact Match (LEM) table handles common prefixes. The Longest Prefix Match (LPM) table retains enough headroom to accommodate route entries that are added.

OptiScale is supported as follows:

It cannot coexist with uRPF (unicast Reverse Path Forwarding).
( SLX 9640) It is supported in the default and non-default VRF.
( SLX 9540) It is supported only in the default VRF. The SLX 9540 supports the default VRF only when OptiScale is enabled.

For more information, see the OptiScale™ for Internet Routing white paper at https://www.extremenetworks.com/resources/white-paper/optiscale-for-internet-routing-internet-scale-routing-on-slx-border-leaf-and-border-platforms/.