Cisco ASR 5x00 Packet Data Network Gateway Administration Guide ▄
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Appendix C
GRE Protocol Interface
This chapter provides information on Generic Routing Encapsulation protocol interface support in the GGSN or P-GW
service node. The product Administration Guides provide examples and procedures for configuration of basic services
on the system. It is recommended that you select the configuration example that best meets your service model, and
configure the required elements for that model, as described in the respective product Administration Guide, before
using the procedures in this chapter.
Important:
GRE protocol interface support is a licensed Cisco feature. A separate feature license may be
required. Contact your Cisco account representative for detailed information on specific licensing requirements. For
information on installing and verifying licenses, refer to the
Managing License Keys
section of the
Software
Management Operations
chapter in the
System Administration Guide
.
Important:
Commands used in the configuration samples in this section provide base functionality to the extent
that the most common or likely commands and/or keyword options are presented. In many cases, other optional
commands and/or keyword options are available. Refer to the
Command Line Interface Reference
for complete
information regarding all commands.
This chapter discusses following topics for GRE protocol interface support:
Introduction
Supported Standards
Supported Networks and Platforms
Services and Application on GRE Interface
How GRE Interface Support Works
GRE Interface Configuration
Verifying Your Configuration
