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.
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: This section provides the minimum instruction set to enable the GRE Protocol Interface support functionality on a GGSN or P-GW. Commands that configure additional functions for this feature are provided in the Command Line Interface Reference.These instructions assume that you have already configured the system level configuration as described in System Administration Guide and specific product Administration Guide.
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Step 1
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Step 2
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Step 3
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Step 4
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Step 5
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Step 6
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Step 7
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Save your configuration to flash memory, an external memory device, and/or a network location using the Exec mode command save configuration. For additional information on how to verify and save configuration files, refer to the System Administration Guide and the Command Line Interface Reference.
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Step 8
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Verify configuration of GRE and VRF related parameters by applying the commands provided in the Verifying Your Configuration section of this chapter.
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context <vpn_context_name> -noconfirm ]
ip vrf <vrf_name>
ip maximum-routes <max_routes>
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<vpn_context_name> is the name of the system context you want to use for VRF. For more information, refer System Administration Guide.
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<vrf_name> is name of the VRF which is to be associated with various interfaces.
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context <vpn_context_name>
ip interface <intfc_name> tunnel
ip vrf forwarding <vrf_name>
ip address <internal_ip_address/mask>
source interface <non_tunn_intfc_to_corp>
destination address <global_ip_address>
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<vpn_context_name> is the name of the system context you want to use for GRE interface configuration. For more information, refer Command Line Interface Reference.
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<intfc_name> is name of the IP interface which is defined as a tunnel type interface and to be used for GRE tunnel interface.
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<vrf_name> is the name of the VRF which is preconfigured in context configuration mode.
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<internal_ip_address/mask> is the network IP address with sub-net mask to be used for VRF forwarding.
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<non_tunn_intfc_to_corp> is the name a non-tunnel interface which is required by system as source interface and preconfigured. For more information on interface configuration refer System Administration Guide.
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<global_ip_address> is a globally reachable IP address to be used as a destination address.
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context <vpn_context_name>
ip vrf <vrf_name>
network <internal_ip_address/mask>
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<vpn_context_name> is the name of the system context you want to use for OSPF routing. For more information, refer Routing in this guide.
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<vrf_name> is the name of the VRF which is preconfigured in context configuration mode.
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<internal_ip_address/mask> is the network IP address with sub-net mask to be used for OSPF routing.
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context <vpn_context_name>
aaa group <aaa_server_group>
ip vrf <vrf_name>
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<vpn_context_name> is the name of the system context you want to use for IP pool and AAA server group.
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<ip_pool_name> is name of a preconfigured IP pool. For more information refer System Administration Guide.
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<aaa_server_group> is name of a preconfigured AAA server group. For more information refer AAA Interface Administrtion and Reference.
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<vrf_name> is the name of the VRF which is preconfigured in context configuration mode.
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<internal_ip_address/mask> is the network IP address with sub-net mask to be used for IP pool.
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context <vpn_context_name>
ip address pool name <ip_pool_name>
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<vpn_context_name> is the name of the system context you want to use for APN configuration.
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<ip_pool_name> is name of a preconfigured IP pool. For more information refer System Administration Guide.
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<aaa_server_group> is name of a preconfigured AAA server group. For more information refer AAA Interface Administrtion and Reference.
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<vrf_name> is the name of the VRF which is preconfigured in context configuration mode.
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context <vpn_context_name>
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<vpn_context_name> is the name of the system context you want to use for static route configuration.
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<internal_ip_address/mask> is the network IP address with sub-net mask to be used as static route.
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<tunnel_intfc_name> is name of a predefined tunnel type IP interface which is to be used for GRE tunnel interface.
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<vrf_name> is the name of the VRF which is preconfigured in context configuration mode.
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This section explains how to display and review the configurations after saving them in a .cfg file as described in the System Administration Guide and also to retrieve errors and warnings within an active configuration for a service.
Important: All commands listed here are under Exec mode. Not all commands are available on all platforms.|
Step 1
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The output of this command displays the configuration of the all interfaces configured in a context.
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Step 2
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