The summit x670 series is available in two models: summit x670v and summit x670. summit x670v provides high density for 10 gigabit ethernet switching in a small 1ru form factor. the switch supports up to 64 ports in one system and 448 ports in a stacked system using high-speed summitstack-v160, which provides 160 gbps throughput and distributed forwarding. the summit x670 model provides up to 48 ports in one system and up to 352 ports in a stacked system using summitstack-v longer distance stacking technology (up to 40 km with 10gbase-er sfp+) .
