Layer 3 Virtualization; Cisco Nx-Os Fowarding Architecture; Unicast Rib - Cisco Nexus 3000 Series Configuration Manual
Nx-os unicast routing configuration guide,
nx-os release 5.0(3)u1(1)
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Also See for Nexus 3000 Series:
- Command reference manual (356 pages) ,
- Configuration manual (182 pages) ,
- Installation manual (112 pages)
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Layer 3 Virtualization
S e n d d o c u m e n t c o m m e n t s t o n e x u s 3 k - d o c f e e d b a c k @ c i s c o . c o m
OSPF is an example of a link-state protocol.
Layer 3 Virtualization
Cisco NX-OS supports multiple Virtual Routing and Forwarding Instances (VRFs) and multiple routing
information bases (RIBs) to support multiple address domains. Each VRF is associated with a routing
information base (RIB) and this information is collected by the Forwarding Information Base (FIB). A
VRF represents a Layer 3 addressing domain. Each Layer 3 interface (logical or physical) belongs to one
VRF. For more information, see
Cisco NX-OS Fowarding Architecture
The Cisco NX-OS forwarding architecture is responsible for processing all routing updates and
populating the forwarding information on the switch.
This section includes the following topics:
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Unicast RIB
The Cisco NX-OS forwarding architecture consists of multiple components, as shown in
Figure 1-3
Switch components
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, NX-OS Release 5.0(3)U1(1)
1-10
Unicast RIB, page 1-10
Adjacency Manager, page 1-11
Unicast Forwarding Distribution Module, page 1-11
FIB, page 1-11
Hardware Forwarding, page 1-12
Software Forwarding, page 1-12
Cisco NX-OS Forwarding Architecture
EIGRP
Unicast FIB Distribution Module (uFDM)
Unicast Forwarding Information Base (UFIB)
Chapter 9, "Configuring Layer 3 Virtualization."
BGP
OSPF
Adjacency Manager (AM)
URIB
Chapter 1
Figure
ARP
Overview
1-3.
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