Prerequisites For Ip Tunnels; Guidelines And Limitations; Default Settings; Configuring Ip Tunnels - Cisco 7206 - VXR Router Configuration Manual

Prerequisites for IP Tunnels

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 7 k - d o c f e e d b a c k @ c i s c o . c o m
Prerequisites for IP Tunnels
IP tunnels have the following prerequisites:
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Guidelines and Limitations

IP tunnels have the following configuration guidelines and limitations:
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Default Settings

Table 8-1
Table 8-1
Parameters
Path MTU discovery age timer
Path MTU discovery minimum MTU
Tunnel feature

Configuring IP Tunnels

This section includes the following topics:
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Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x
8-4
You must be familiar with TCP/IP fundamentals to configure IP tunnels.
You are logged on to the switch.
You have installed the Enterprise Services license for Cisco NX-OS.
You must enable the tunneling feature in a device before you can configure and enable any IP
tunnels.
Cisco NX-OS supports the GRE Header defined in IETF RFC 2784. Cisco NX-OS does not support
tunnel keys and other options from IETF RFC 1701.
Beginning with Cisco NX-OS Release 5.2(5) and for later 5.2(x) releases, you can configure the
tunnel interface and the tunnel transport in different Virtual Routing and Forward instances (VRF).
The tunnels are supported only on M1 Series cards on Cisco Nexus 7000 Series platforms.
Cisco NX-OS does not support WCCP on tunnel interfaces.
Cisco NX-OS does not support GRE tunnel keepalives.
lists the default settings for IP tunnel parameters.
Default IP Tunnel Parameters
Enabling Tunneling, page 8-5
Creating a Tunnel Interface, page 8-5
Configuring a GRE Tunnel, page 8-7
Enabling Path MTU Discovery, page 8-8
Assigning VRF Membership to a Tunnel Interface, page 8-8
Chapter 8
Default
10 minutes
64
Disabled
Configuring IP Tunnels
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