Cisco Catalyst 4000 Series Supervisor IV with 2 GE Ports WS-X4515=

Port Aggregation Protocol (PAgP). Model: Cisco Catalyst 4500. Cisco Catalyst 4006. Cisco Catalyst 4503. Cisco Catalyst 4506. Cisco Catalyst 4507R. Cisco Discovery Protocol. Cisco EtherChannel, Fast EtherChannel, and Gigabit EtherChannel technology across line cards.

eBay