#Infra #On-premises #Concepts
1. Cisco C9500 Overview
- Official name: Cisco Catalyst 9500 Series Switch
- Type: Enterprise/data center core and aggregation switch
- Placement: Can be used as a ToR (Top of Rack) switch or deployed at the Core layer
2. Role
- Connects servers, storage, and other network devices at the L2/L3 level
- Routes and switches traffic between the internal data center network and external networks
- Can also aggregate multiple ToR switches (Leaves) and connect them to the Spine network
3. Features
- High-speed port support: 10G / 25G / 40G / 100G uplinks
- Enterprise-grade capabilities:
- Routing (OSPF, BGP, etc.)
- Multicast, QoS
- Security (MACsec, TrustSec)
- Automation (SDN, Cisco DNA Center integration)
- Availability: High availability (HA) support, hot-swappable modules
4. Simple Analogy
- The router at home handles “a few computers → internet” at most
- The Cisco C9500 is like an ultra-fast, ultra-reliable router that connects “a data center with thousands of servers → the external network/internet”
5. Visual Overview
[ 외부 인터넷 / 상위 네트워크 ]
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[ Cisco C9500 ]
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[서버] [스토리지] [다른 랙 스위치]👉 Summary:
Cisco C9500 = A high-performance switch that connects servers/storage ↔ the external network inside a data center.
In your project, it acts as a ToR switch — think of it as the hub that ties together the servers (R760, R730XD) and storage inside the rack and connects them to the outside world.
[ 사용자 / 외부 네트워크 ]
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(LAN 스위치)
Cisco C9500
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[R760 컴퓨트 서버] [R730XD Ceph 서버]
(SAN 스위치)
DS-7720B
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[서버 HBA] [PowerStore 1200T]