LTE Foreign PLMN GUTI Management Database Configuration Mode Commands

The LTE Foreign PLMN GUTI Management Database Configuration Mode is used to is used to create restrictions on foreign PLMNs, thereby avoiding DNS request attempts to foreign PLMNs.

Mode

Exec > Global Configuration > LTE Policy Configuration > Foreign PLMN GUTI Management Database

configure > lte-policy > foreign-plmn-guti-mgmt-db

Entering the above command sequence results in the following prompt:

[local]host_name(foreign-plmn-guti-mgmt-db)#
Important:

The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).

end

Exits the current configuration mode and returns to the Exec mode.

Product

All

Privilege

Security Administrator, Administrator

Syntax

Syntax Description

end

Usage Guidelines

Use this command to return to the Exec mode.

exit

Exits the current mode and returns to the parent configuration mode.

Product

All

Privilege

Security Administrator, Administrator

Syntax

Syntax Description

exit

Usage Guidelines

Use this command to return to the parent configuration mode.

plmn

Configures a foreign Public Land Mobile Network (PLMN) entry in the Foreign PLMN GUTI management database. This optional configuration is used to control the acceptance or immediate reject of Attach Requests and TAU Requests containing a GUTI from this PLMN.

Product

MME

Privilege

Administrator

Mode

Exec > Global Configuration > LTE Policy Configuration > Foreign PLMN GUTI Management Database

configure > lte-policy > foreign-plmn-guti-mgmt-db

Entering the above command sequence results in the following prompt: 

[local]host_name(foreign-plmn-guti-mgmt-db)#

Syntax

Syntax Description

plmn mcc { mcc_value | any } mnc { mnc_value | any } [ allow | reject ]
plmn mcc mcc_value mnc mnc_value

no

Removes the specified PLMN entry from the Foreign PLMN GUTI management database.

mcc mcc_value mnc mnc_value

mcc { mcc_value | any }: Specifies the mobile country code (MCC) portion of the PLMN identifier as an integer from 100 through 999. Use the optional any keyword to specify a wildcard, representing any MCC.

mnc { mnc_value | any }: Specifies the mobile network code (MNC) portion of the PLMN identifier a 2- or 3-digit integer from 00 through 999. Use the optional any keyword to specify a wildcard, representing any MNC.

Note: The any keyword can only be used for the MNC value when a specific MCC value is given. For example, the follow command is not allowed:

plmn mcc any mnc 456 allow

allow

Configures the MME to allow foreign GUTIs from this PLMN.

reject

Configures the MME to reject foreign GUTIs from this PLMN.

Usage Guidelines

Use this command to create and configures a foreign Public Land Mobile Network (PLMN) entry in the Foreign PLMN GUTI management database. This optional configuration is used to control the acceptance or immediate reject of Attach Requests and TAU Requests containing a GUTI from this PLMN.

If the configured action is Reject, the MME takes the following actions:

  • Attach Requests: a NAS Identity Request is sent to the UE to determine its IMSI, and no DNS lookup is performed to find a peer MME or SGSN.
  • TAU Requests: a TAU Reject message is sent immediately with cause code 9 (UE Identity cannot be derived by the network), and no DNS lookup is performed to find a peer MME or SGSN.

If the configured action is Allow, the MME continues processing the Attach Request or TAU Request, and a DNS request may be made.

A maximum of 16 foreign PLMN entries can be added to a Foreign PLMN GUTI management database.

Examples

The following command creates a plmn entry in the foreign PLMN GUTI management database. The entry specifies that GUTIs from PLMNs with the MCC of 123 and any MNC be rejected. 

plmn mcc 123 mnc any reject