Upon route injection on QFX series platform, RE memory utilization can increase
Below is an example scale for which utilization is 81%
BGP v4: ~125k routes
BGP v6: ~50k routes
IS-IS: ~3.5k v6 routes
OSPF:~6.5K
LDP:~3.5k
PIM:~1.5k routes
user@qfx5100> show chassis routing-engine | match "Memory"
Memory utilization 81 percent
Once the route scale is reduced, say to less than 100k in total, we could see memory dropped to 71%
Memory utilization 71 percent
Increase in RE memory upon increasing route scale
This is expected behaviour. Users are recombed to use show pfe route summary hw command to monitor active and free memory for route scale