Cisco Nexus 7000 Series - Routing Metrics

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Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 1 Overview
Information About Layer 3 Unicast Routing
Figure 1-1 Packet Header Updates Through a Network
Routing Metrics
Routing algorithms use many different metrics to determine the best route. Sophisticated routing
algorithms can base route selection on multiple metrics.
This section includes the following metrics:
• Path Length, page 1-4
• Reliability, page 1-4
• Routing Delay, page 1-4
• Bandwidth, page 1-4
• Load, page 1-4
• Communication Cost, page 1-4
Source host
PC
Destination host
PC
Packet
Packet
Packet
Packet
Router 1
Router 2
Router 3
To: Destination host (Protocol address)
Destination host (Physical address)
To: Destination host (Protocol address)
Router 3 (Physical address)
To: Destination host (Protocol address)
Router 2 (Physical address)
To: Destination host (Protocol address)
Router 1 (Physical address)
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