L3 Routing & Multicasting

Typical Enterprise Network Design

Layer 3 Feature by place in Network

Layer 3 Access Consideration• Advantages Lower L2 table utilization Smaller L2 domain eliminate STP

• Drawbacks More L3 configuration points VM mobility constrained to a smaller L2

domain

• Use OSPF stub area, EIGRP stub or static default routes

• Fabric Extender technology enables larger L2 domains without adding STP hops

Layer 3 Aggregation Considerations

Nexus 7000 Layer 3 and MPLS Support

Comparison of I/O Module

Licence• Enterprise Services License - all routing protocols

except RIP • MPLS License – MPLS features • XL License – higher FIB table sizes (optional) • Base - all other Layer 3 features (SVIs, Layer 3 ports,

FHRP, IGMP etc)

Nexus 5500 L3 Support

5500 L3 Licence

Nexus 2000 FEX L3 / MPLS

IP Unicast Routing and Forwarding

NX-OS and Nexus 7000 Unicast Routing Architecture

NX-OS Unicast Routing ProtocolsPlatform Support

NX-OS Unicast Routing ProtocolsConfiguration Highlights

Management and Troubleshooting Highlights

Router-id Selection Process

OSPF in NX-OS

OSPF

EIGRP in NX-OS

EIGRP

BGP

• Full MP-BGP support • BGP version 4 (RFC 4271) • Multi-Protocol Extensions (RFC 2858) • Integrated implementation for IPv4 and IPv6 • Route Reflector support for all Afs • BGP Dynamic Capability (draft-ietf-idr-dynamic-

cap-14) • 4 byte ASN support and interoperability (RFC

4893)

BGP