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This module contains information about MIBs used with interfaces and hardware components. The IP Tunnel MIB feature provides a generic MIB for managing all IPv4- and IPv6-related tunnels, as outlined in RFC 4087, IP Tunnel MIB. Tunneling provides a way to encapsulate arbitrary packets inside a transport protocol. A number of tunneling mechanism s specified by Internet Engineering Task Force (IETF) are implemented by Cisco for both IPv4 and IPv6 environments. Various MIBs are available for managing tunnels.
Configure Simple Network Management Protocol (SNMP) on the router on which the IP Tunnel MIB feature is to be used. See the Configuring the Router to Use SNMP for more information. For more information on configuring an SNMP server, see the "Configuring SNMP Support " chapter of the Cisco IOS Network Management Configuration Guide.
The IP Tunnel MIB feature supports only tunnels that can be created using the interface tunnel command. The IP Tunnel MIB feature does not support Layer 2 Tunnel Protocol (L2TP), Point-to-Point Tunneling Protocol (PPTP), or Multiprotocol Label Switching (MPLS) tunnels.
Better IP tunnel instrumentation leads to an improvement in the quality of networks and better service delivery. A better quality network allows service providers to deliver a more reliable service.
The IP Tunnel MIB allows users of network management systems to set inventory and receive notification about their IP tunnel activity.
The IP Tunnel MIB supports both IPv4 and IPv6 network layers as defined in RFC 3291, and is used to manage IP tunnels implemented in the Cisco IOS software.
The IP Tunnel MIB supports all tunnel types, as well as tunnel creation and destruction capability.
The IP Tunnel MIB works with key network management systems, including those of third-party vendors.
The following MIB objects are supported by the IP Tunnel MIB feature. For details regarding use of MIB objects, see RFC 4087, IP Tunnel MIB.
|
MIB Object |
Description |
|---|---|
|
tunnelIfEntry |
Contains information on a particular configured tunnel. You can use the interface tunnel command to set a value for this object. |
|
tunnelIfEncapsMethod |
The encapsulation method used by the tunnel. You can use the tunnel mode command to set a value for this object. |
|
tunnelIfHopLimit |
Defines the IPv4 time to live (TTL) or IPv6 hop limit to use in the outer IP header. You can use the tunnel ttl command to set a value for this object. |
|
tunnelIfSecurity |
Used by the tunnel to secure the outer IP header. The value ipsec indicates that IPsec is used between the tunnel endpoints for authentication or encryption, or both. |
|
tunnelIfTOS |
Used by the tunnel to set the high 6 bits (the differentiated services codepoint) of the IPv4 type of service (ToS) or IPv6 traffic class in the outer IP header. You can use the tunnel tos command to set a value for this object. |
|
tunnelIfFlowLabel |
Used to set the IPv6 Flow Label value. This object is supported for tunnels over IPv6. The default value for this object is 0. |
|
tunnelIfAddressType |
Shows the type of address in the corresponding tunelIfLocalInetAddress and tunnelIfRemoteInetAddress objects. This object cannot be configured individually through the command-line interface (CLI). |
|
tunnelIfLocalInetAddress |
The address of the local endpoint of the tunnel (that is, the source address used in the outer IP header). If the address is unknown, the value is 0.0.0.0 for IPv4 or :: for IPv6. The address type of this object is given by tunnelIfAddressType. You can use the tunnel source command to set a value for this object. |
|
tunnelIfRemoteInetAddress |
The address of the remote endpoint of the tunnel (that is, the destination address used in the outer IP header). If the address is unknown or the tunnel is not a point-to-point link (for example, a 6-to-4 tunnel), the value is 0.0.0.0 for tunnels over IPv4 or :: for tunnels over IPv6. The address type of this object is given by tunnelIfAddressType. You can use the tunnel destination command to set a value for this object. |
|
tunnelIfEncapsLimit |
Shows the maximum number of additional encapsulations permitted for packets undergoing encapsulation at this node. A value of -1 indicates that no limit is present (except as result of packet size). |
|
tunnelInetConfigEntry |
Contains information on a particular configured tunnel. There will be only one entry for multipoint tunnels and for tunnels that have the remote inet address 0.0.0.0 for IPv4 or :: for IPv6. Only generic routing encapsulation (GRE)/IP and GRE/IPv6 tunnels are created through the MIB. |
|
tunnelInetConfigIfIndex |
Shows the value of ifIndex corresponding to the tunnel interface. A value of 0 is not legal in the active state and means that the interface index has not yet been assigned. |
|
tunnelInetConfigStatus |
Used to create or delete table entries in the MIB table. You can use the interface tunnel to set a value for this object. |
|
tunnelInetConfigStorageType |
Indicates the storage type. Only a nonvolatile storage value is supported. |
 Note |
Some of the tasks in this section include examples of the SNMP CLI syntax used to set configuration parameters on the router and to read values from MIB objects on the router. These SNMP CLI syntax examples are taken from a Linux workstation using public domain SNMP tools. The SNMP CLI syntax for your workstation might be different. See the documentation that was provided with your SNMP tools for the correct syntax for your network management workstation. |
| Command or Action | Purpose | |||
|---|---|---|---|---|
|
Step 1 |
enable Example: |
Enables privileged EXEC mode.
|
||
|
Step 2 |
configure terminal Example: |
Enters global configuration mode. |
||
|
Step 3 |
snmp-server community string1 ro Example: |
Sets up the community access string to permit access to SNMP.
|
||
|
Step 4 |
snmp-server community string2 rw Example: |
Sets up the community access string to permit access to SNMP.
|
||
|
Step 5 |
end Example: |
Exits the current configuration mode and returns to privileged EXEC mode. |
To implement the IP Tunnel MIB, you must configure a tunnel. For information on configuring tunnels, see the " Implementing Tunnels " chapter in the Cisco IOS Interface and Hardware Component Configuration Guide.
To debug or troubleshoot any issues related to configuring the IP Tunnel MIB through SNMP, use the debug snmp tunnel-mib command. For information on this command see Cisco IOS Interface and Hardware Component Command Reference.
|
Related Topic |
Document Title |
|---|---|
|
SNMP commands, complete command syntax, command reference, command history, defaults, defaults, usage guidelines, and examples |
Cisco IOS Network Management Command Reference |
|
Configuring SNMP Support |
Cisco IOS Network Management Configuration Guide |
|
Implementing tunnels |
Cisco IOS Interface and Hardware Component Configuration Guide |
|
Standard |
Title |
|---|---|
|
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature. |
-- |
|
MIB |
MIBs Link |
|---|---|
|
IP Tunnel MIB |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: http://www.cisco.com/go/mibs |
|
RFC |
Title |
|---|---|
|
RFC 4087 |
IP Tunnel MIB |
|
Description |
Link |
|---|---|
|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
http://www.cisco.com/cisco/web/support/index.html |
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.|
Feature Name |
Releases |
Feature Information |
|---|---|---|
|
IP Tunnel MIB |
12.2(33)SRB 12.2(1st)SY 12.2(44)SG 12.2(33)SRD 15.0(1)M Cisco IOS XE 3.1.0SG Cisco IOS XE Release 3.9S |
The IP Tunnel MIB provides a generic MIB for managing all IPv4- and IPv6-related tunnels, as outlined in RFC 4087 IP Tunnel MIB. |
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