Cisco 6000 series User Manual

Figure 3: Basic Encapsulation and De-capsulation with an IP-in-IP
Tunnel
Use Case: Configure IP-in-IP de-capsulation
The following topology describes a use case where IP-in-IP encapsulation and de-capsulation is used for
different segments of the network from source to destination. The IP-in-IP tunnel consists of multiple routers
used to de-capsulate and direct the packet through the data center fabric network.
Figure 4: IP-in-IP De-capsulation through a Data Center Network
The following illustration shows how the stacked IPv4 headers are de-capsulated as they traverse through the
de-capsulating routers.
Figure 5: IP Header De-capsulation
Stacked IP Header in an Encapsulated Packet
The encapsulated packet will have an outer IPv4 header stacked over the original IPv4 header, as shown in
the following illustration.
Interface and Hardware Component Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
144
Configuring IP-in-IP Decapsulation
IP-in-IP Decapsulation

Cisco 6000 series Specifications

General

Category	Network Router
Model	Cisco 6000 series
Routing Protocols	BGP, OSPF, EIGRP, IS-IS, RIP
Interfaces	Gigabit Ethernet, 10 Gigabit Ethernet
Ports	Varies by model
Power Supply	Redundant power supply options
Dimensions	Varies by model
Weight	Varies by model
Redundancy	Power supplies, fans, route processors
Operating System	Cisco IOS