Server Connectivity Options
- Single NIC (FE GE Full duplex + No redundancy)
- Dual NIC Etherchannel – redundancy
- Dual NIC to separate access – redundancy
- Content switching – redundancy + load balancing per user request
Enterprise Data Center
- Port density for servers
- Low latency layer 2
- Suport both single and dual connected servers
- Aggregation (Distribution) Layer has Load balancers+ SSL Offloading services + Firewalls+ Intrusion detection
Campus LAN QoS Considerations
Access Layer
- Classify and mark packets
Layer 2 Cos:
ISL - a vlan tag to each frame (26 byte ISL header + 4 bytes FCS CRC trailer ). Header: 15 bit vlan ID + 3 bit Cos
802.1p/802.1Q - Internal tag. 3 bit priority for CoS
CyberSecFaith 