# US 12,603,812 B2 · Virtual internet protocol address associated with subscriber group

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- Number: US 12,603,812 B2
- Document ID: US12603812B2
- Status: Granted
- Kind: B2
- Application number: 18/493,617
- Filed: 2023-10-24
- Published: 2025-04-24
- Granted: 2026-04-14
- Earliest claimed: 2023-10-24
- Assignees: Juniper Networks, Inc.
- Applicants: Juniper Networks, Inc.
- Inventors: Venkatesh Padebettu
- Web page: https://patentgrep.com/patent/US12603812B2

## CPC

- H04L 41/0659: by isolating or reconfiguring faulty entities
- H04L 45/28: using route fault recovery
- H04L 12/4633: {Interconnection of networks using encapsulation techniques, e.g. tunneling}
- H04L 69/40: for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection (management of faults, events, alarms or notifications in data switching networks H04L41/06)
- H04W 24/04: Arrangements for maintaining operational condition
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

In some implementations, a network device may transmit an indication that a first access gateway function user plane (AGF-UP) device is associated with an active state for a subscriber group, an indication that a second AGF-UP device is associated with a backup state for the subscriber group, and an indication of a virtual internet protocol (IP) address associated with the subscriber group. The network device may transmit a failover indication that the second AGF-UP device is associated with the active state for the subscriber group.

## Claims

### Claim 1

A method, comprising:
transmitting, by a network device, an indication that a first access gateway function user plane (AGF-UP) device is associated with an active state for a subscriber group, an indication that a second AGF-UP device is associated with a backup state for the subscriber group, and an indication of a virtual internet protocol (IP) address associated with the subscriber group; and
transmitting, by the network device, a failover indication that the second AGF-UP device is associated with the active state for the subscriber group.

### Claim 2 (depends on 1)

The method of claim 1, wherein the virtual IP address is associated with a local endpoint of an N3 tunnel.

### Claim 3 (depends on 2)

The method of claim 2, wherein the virtual IP address is a first virtual IP address, the method further comprising:
transmitting, by the network device, a second virtual IP address associated with an endpoint of a control packet redirect interface (CPRi) tunnel, wherein the second virtual IP address is different from the first virtual IP address.

### Claim 4 (depends on 2)

The method of claim 2, wherein the virtual IP address is further associated with an endpoint of a control packet redirect interface (CPRi) tunnel.

### Claim 5 (depends on 2)

The method of claim 2, wherein a fully qualified tunnel endpoint identifier (F-TEID) associated with the N3 tunnel is based on the virtual IP address.

### Claim 6 (depends on 2)

The method of claim 2, wherein a fully qualified tunnel endpoint identifier (F-TEID) associated with a user plane function (UPF) is associated with the N3 tunnel.

### Claim 7 (depends on 1)

The method of claim 1, wherein the virtual IP address is associated with an endpoint of a control packet redirect interface (CPRi) tunnel.

### Claim 8 (depends on 7)

The method of claim 7, wherein a fully qualified tunnel endpoint identifier (F-TEID) associated with the CPRi tunnel is based on the virtual IP address.

### Claim 9 (depends on 7)

The method of claim 7, wherein a fully qualified tunnel endpoint identifier (F-TEID) associated with the network device is associated with the CPRi tunnel.

### Claim 10 (depends on 1)

The method of claim 1, wherein the network device is an access gateway function control plane (AGF-CP) device.

### Claim 11

A device, comprising:
one or more memories; and
one or more processors to:
transmit an indication that a first access gateway function user plane (AGF-UP) device is associated with an active state for a subscriber group, an indication that a second AGF-UP device is associated with a backup state for the subscriber group, and an indication of a virtual internet protocol (IP) address associated with the subscriber group, wherein the virtual IP address is associated with a local endpoint of an N3 tunnel; and
transmit a failover indication that the second AGF-UP device is associated with the active state for the subscriber group.

### Claim 12 (depends on 11)

The device of claim 11, wherein the virtual IP address is a first virtual IP address, and wherein the one or more processors are further to:
transmit a second virtual IP address associated with an endpoint of a control packet redirect interface (CPRi) tunnel, wherein the second virtual IP address is different from the first virtual IP address.

### Claim 13 (depends on 11)

The device of claim 11, wherein the virtual IP address is further associated with an endpoint of a control packet redirect interface (CPRi) tunnel.

### Claim 14 (depends on 11)

The device of claim 11, wherein a fully qualified tunnel endpoint identifier (F-TEID) associated with the N3 tunnel is based on the virtual IP address.

### Claim 15 (depends on 11)

The device of claim 11, wherein a fully qualified tunnel endpoint identifier (F-TEID) associated with a user plane function (UPF) is associated with the N3 tunnel.

### Claim 16

A non-transitory computer-readable medium storing a set of instructions, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a device, cause the device to:
transmit an indication that a first access gateway function user plane (AGF-UP) device is associated with an active state for a subscriber group, an indication that a second AGF-UP device is associated with a backup state for the subscriber group, and an indication of a virtual internet protocol (IP) address associated with the subscriber group, wherein the virtual IP address is further associated with an endpoint of a control packet redirect interface (CPRi) tunnel; and
transmit a failover indication that the second AGF-UP device is associated with the active state for the subscriber group.

### Claim 17 (depends on 16)

The non-transitory computer-readable medium of claim 16, wherein a fully qualified tunnel endpoint identifier (F-TEID) associated with the CPRi tunnel is based on the virtual IP address.

### Claim 18 (depends on 16)

The non-transitory computer-readable medium of claim 16, wherein a fully qualified tunnel endpoint identifier (F-TEID) associated with the device is associated with the CPRi tunnel.

### Claim 19 (depends on 16)

The non-transitory computer-readable medium of claim 16, wherein the virtual IP address is a first virtual IP address, and wherein the one or more instructions, when executed by the one or more processors of the device, further cause the device to:
transmit a second virtual IP address associated with a local endpoint of an N3 tunnel, wherein the second virtual IP address is different from the first virtual IP address.

### Claim 20 (depends on 16)

The non-transitory computer-readable medium of claim 16, wherein the virtual IP address is further associated with a local endpoint of an N3 tunnel.