To get an idea about the current number of Internet routes, for both IPv4 and IPv6:
moghaddas@USA> show route summary | match "inet|bgp" inet.0: 560133 destinations, 1663174 routes (558798 active, 0 holddown, 1525 hidden) BGP: 1663124 routes, 558752 active inet6.0: 24047 destinations, 47458 routes (23459 active, 0 holddown, 851 hidden) BGP: 47444 routes, 23447 active
moghaddas@GER> show route summary | match "inet|bgp" inet.0: 541278 destinations, 965338 routes (541118 active, 0 holddown, 206 hidden) BGP: 965308 routes, 541091 active inet6.0: 22658 destinations, 38527 routes (22558 active, 0 holddown, 104 hidden) BGP: 38516 routes, 22549 active
moghaddas@IRE> show route summary | match "inet|bgp" inet.0: 545571 destinations, 1547251 routes (545111 active, 0 holddown, 1237 hidden) BGP: 1547185 routes, 545062 active inet6.0: 23065 destinations, 65881 routes (23026 active, 0 holddown, 90 hidden) BGP: 65860 routes, 23008 active
Now, imagine what would be the outcome of route flaps for a Service Provider environment with many eBGP neighbors. Instability and customer dissatisfaction!
The first solution to avoid such situations is BGP Route Dampening/Damping. Continue reading “Internet routing table and damping on JunOS”
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