cnBNG User Plane Configuration Commands

This chapter describes the Cisco IOS XR software commands that are used to configure the cloud native Broadband Network Gateway (cnBNG) user plane on Cisco ASR 9000 Series Routers. For details regarding the related configurations, see the Cloud Native BNG User Plane Configuration Guide for Cisco ASR 9000 Series Routers.

auto-loopback

To configure NOS adaptation layer (NAL) auto-loopback on the user plane of cloud native BNG, use the auto-loopback command in cnbng-nal configuration mode. To remove this configuration, use the no form of this command.

auto-loopback vrf { vrf-name | default } [ interface Loopback loopback-num ] [ primary-address ip-address ]

Syntax Description

vrf

Configures the VRF for the NAL auto-loopback.
vrf-name

Specifies the name of the NAL auto-loopback VRF.
default

Configures the default NAL auto-loopback VRF.
interface Loopback

Configures the NAL auto-loopback interface.

loopback-num

Specifies the NAL auto-loopback interface number.
primary-address

Configures the primary IP address of the NAL auto-loopback.
ip-address

Specifies the primary IP address of the NAL auto-loopback.

Command Default

None

Command Modes

cnbng-nal

Command History

Release Modification

Release 7.3.1

This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID

Task ID Operation
config-services

read, write

Examples

This example shows how to configure NAL auto-loopback for a default VRF on the user plane of cloud native BNG: 


Router(config)#cnbng-nal location 0/1/CPU0
Router(config-cnbng-nal)#auto-loopback vrf default interface Loopback1 primary-address 10.0.0.1
Router(config-cnbng-nal)#commit

cnbng-nal

To enter into the cnbng-nal configuration mode and to specify the NOS adaptation layer (NAL) configurations for the user plane of cloud native BNG (cnBNG), use the cnbng-nal command in Global Configuration mode.

cnbng-nal location location

Syntax Description

location location

Specifies the location of the cnBNG NAL node (route processor or line card).

Command Default

None

Command Modes

Global Configuration

Command History

Release Modification

Release 7.3.1

This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID

Task ID Operation
config-services

read, write

Examples

This example shows how to enter into the cnbng-nal configuration mode: 


Router(config)#cnbng-nal location 0/1/CPU0
Router(config-cnbng-nal)#

cp-association

To specify the retry count to start the cnBNG control plane-user plane (CP-UP) association, use the cp-association command in cnbng-nal configuration mode. To remove this configuration, use the no form of this command.

cp-association retry-count count

Syntax Description

retry-count count

Specifies the retry count to start the cnBNG CP-UP association.

The range is 5 to 20.

Command Default

None

Command Modes

cnbng-nal

Command History

Release Modification

Release 7.3.1

This command was introduced.

Usage Guidelines

It is mandatory to configure this cp-association command along with the other relevant CP server/UP server configurations to start the cnBNG CP-UP association.

You can use the show cnbng-nal cp connection status location command to verify if the retry count is configured or not. A sample output is given here: 


Router#show cnbng-nal cp connection status location 0/0/CPU0
Wed Nov 18 14:32:30.101 IST
 
Location: 0/0/CPU0
 
 
User-Plane configurations:
-------------------------
IP             : 11.11.11.1
GTP Port       : 15002
PFCP Port      : 15003
VRF            : default
 
 
Control-Plane configurations:
----------------------------
PRIMARY IP     : 11.11.11.2
GTP Port       : 2152
PFCP Port      : 8805
 
Retry count is not configured
 
Connection Status: Down
Connection Status time stamp: Wed Nov 18 14:32:15 2020
 
Connection Prev Status : Up
Connection Prev Status time stamp: Wed Nov 18 14:12:20 2020
 
Association status: Inactive
Association status time stamp: Wed Nov 18 14:31:08 2020

Task ID

Task ID Operation
config-services

read, write

Examples

This example shows how to specify the retry count to start the cnBNG (CP-UP) association: 


Router(config)#cnbng-nal location 0/1/CPU0
Router(config-cnbng-nal)#cp-association retry-count 5
Router(config-cnbng-nal)#commit

cp-server

To configure the server details of the control plane for cloud native BNG (cnBNG), use the cp-server command in cnbng-nal configuration mode. To remove this configuration, use the no form of this command.

cp-server primary ipv4 ipv4-address

Syntax Description

primary

Configures the details of the primary server of the control plane.
ipv4 ipv4-address

Specifies the IPv4 address of the primary server of the control plane.

Command Default

None

Command Modes

cnbng-nal

Command History

Release Modification

Release 7.3.1

This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID

Task ID Operation
config-services

read, write

Examples

This example shows how to configure the primary server details of the control plane of cnBNG: 


Router(config)#cnbng-nal location 0/1/CPU0
Router(config-cnbng-nal)#cp-server primary ipv4 198.51.100.1
Router(config-cnbng-nal)#commit

disable-secondary-address-notification

To disable internal notification messages between the software components during the secondary address update under the loopback interface on cnBNG user plane (UP), use the disable-secondary-address-notification command in cnbng-nal configuration mode. To remove this configuration, use the no form of this command.

disable-secondary-address-notification

Syntax Description

This command has no keywords or arguments.

Command Default

None

Command Modes

cnbng-nal

Command History

Release Modification

Release 7.4.2

This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID

Task ID Operation
config-services

read, write

Examples

This example shows how to disable internal notification messages between the software components during the secondary address update for route provisioning on the cnBNG UP: 


Router#configure
Router(config)#cnbng-nal location 0/RSP0/CPU0
Router(config-cnbng-nal-local)#disable-secondary-address-notification
Router(config-cnbng-nal-local)#commit

hostidentifier

To specify a host identifier for the cloud native BNG (cnBNG) NOS adaptation layer (NAL) instance, use the hostidentifier command in cnbng-nal configuration mode. To remove this configuration, use the no form of this command.

hostidentifier hostname

Syntax Description

hostname

Specifies the hostname of cnBNG NAL.

Command Default

None

Command Modes

cnbng-nal

Command History

Release Modification

Release 7.3.1

This command was introduced.

Usage Guidelines

The host identifier string must match the user plane (UP) name configured in the control plane (CP) for the CP-UP association to come up.

Task ID

Task ID Operation
config-services

read, write

Examples

This example shows how to specify a host identifier for the NAL instance on cnBNG user plane: 


Router(config)#cnbng-nal location 0/1/CPU0
Router(config-cnbng-nal)#hostidentifier test-host
Router(config-cnbng-nal)#commit

ipoe fsol-flow-control

To configure flow control feature for IPoE protocol packets sent from cnBNG user plane (UP) to control plane (CP), use the ipoe fsol-flow-control command in cnbng-nal configuration mode. To remove the configuration, use the no form of this command.

ipoe fsol-flow-control limit

Syntax Description

limit

Specifies the maximum number of IPoE protocol packets to be sent from cnBNG UP to CP for each second.

The limit ranges from 50 to 400; default being 100.

Command Default

Disabled, by default.

Command Modes

cnbng-nal

Command History

Release

Modification

Release 7.4.2

This command was introduced

Usage Guidelines

The IPoE protocol packets covered under this flow control feature include IPoE DHCPv4 DISCOVER and DHCPv6 SOLICIT messages.

Task ID

Task ID

Operations

config-services

read, write

Examples

This example shows how to specify the limit of IPoE protocol packets to be sent from cnBNG UP to CP for each second: 


Router#configure
Router(config)#cnbng-nal location 0/0/CPU0 
Router(config-cnbng-nal-local)#ipoe fsol-flow-control 70
Router(config-cnbng-nal-local)#commit

Related Commands

Command Description

pppoe fsol-flow-control

 Configures flow control feature for PPPoE protocol packets sent from cnBNG user plane to control plane. 

pppoe fsol-flow-control

To configure flow control feature for IPoE protocol packets sent from cnBNG user plane to control plane, use the pppoe fsol-flow-control command in cnbng-nal configuration mode. To remove the configuration, use the no form of this command.

pppoe fsol-flow-control limit

Syntax Description

limit

Specifies the number of PPPoE protocol packets to be sent from cnBNG UP to CP for each second.

The limit ranges from 50 to 400; default being 100.

Command Default

Disabled, by default.

Command Modes

cnbng-nal

Command History

Release

Modification

Release 7.4.2

This command was introduced

Usage Guidelines

The PPPoE protocol packets covered under this flow control feature include PPPoE-PTA PADI (PPPoE Active Discovery Initiation), PPPoE-LAC PADI, and PPPOE-PTA DHCPV6 SOLICIT messages.

Task ID

Task ID

Operations

config-services

read, write

Examples

This example shows how to specify the limit of PPPoE protocol packets to be sent from cnBNG UP to CP for each second: 


Router#configure
Router(config)#cnbng-nal location 0/0/CPU0 
Router(config-cnbng-nal-local)#pppoe fsol-flow-control 60
Router(config-cnbng-nal-local)#commit

Related Commands

Command Description

ipoe fsol-flow-control

 Configures flow control feature for IPoE protocol packets sent from cnBNG user plane to control plane. 

route-summary

To configure the cnBNG NAL route summary tag, use the route-summary command in cnbng-nal configuration mode. To remove this configuration, use the no form of this command.

route-summary tag { tag-value | default }

Syntax Description

tag

Sets a tag value for the route.
tag-value

Specifies the tag value.

The range is 1 to 4294967295.
default

Specifies the default tag (of value 1) for the NAL server subscriber route summary.

Command Default

None

Command Modes

cnbng-nal

Command History

Release Modification

Release 7.3.1

This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID

Task ID Operation
config-services

read, write

Examples

This example shows how to configure the cnBNG NAL route summary tag: 


Router(config)#cnbng-nal location 0/1/CPU0
Router(config-cnbng-nal)#route-summary tag 4
Router(config-cnbng-nal)#commit

secondary-address-update

To enable secondary address update under loopback during route provisioning on cnBNG user plane (UP), use the secondary-address-update command in cnbng-nal configuration mode. To remove this configuration, use the no form of this command.

secondary-address-update enable

Syntax Description

enable

Enables the secondary address update.

Command Default

None

Command Modes

cnbng-nal

Command History

Release Modification

Release 7.3.1

This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID

Task ID Operation
config-services

read, write

Examples

This example shows how to enable secondary address update during route provisioning on the cnBNG user plane: 


Router(config)#cnbng-nal location 0/1/CPU0
Router(config-cnbng-nal)#secondary-address-update enable
Router(config-cnbng-nal)#commit

slaac

To enable Stateless Address Auto-Configuration (SLAAC) for IPv6 IANA address assignment, use the slaac command in cnbng-nal configuration mode. To disable the feature, use the no form of this command.

slaac

Syntax Description

This command has no keywords or arguments.

Command Default

None

Command Modes

cnbng-nal configuration mode

Command History

Release

Modification

Release 24.4.1

This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command

Examples

This example shows how to enable SLAAC for PPPoE sessions: 

Router#configure
Router(config)#interface Bundle-Ether1.1
Router(config-subif)#pppoe enable
Router(config-subif)# cnbng-nal ipv6 nd
Router(config-cnbng-nal)# ra-initial 0 16
Router(config-cnbng-nal-ra)# slaac
Router(config-cnbng-nal-ra)#exit

up-cp-notification flow-control

To configure flow control feature for notification events sent from cnBNG user plane (UP) to control plane (CP), use the up-cp-notification flow-control command in cnbng-nal configuration mode. To remove the configuration, use the no form of this command.

up-cp-notification flow-control limit

Syntax Description

limit

Specifies the maximum number of notification events to be sent from cnBNG UP to CP for each second.

The limit ranges from 20 to 400; default being 100.

Command Default

Disabled, by default.

Command Modes

cnbng-nal

Command History

Release

Modification

Release 7.4.2

This command was introduced

Usage Guidelines

This command is common for IPoE, PPPoE-PTA, and PPPoE-LAC sessions.

The notification events covered under this flow control feature include locally generated messages on UP such as:

  • subscriber delete notifications (say, during mark-and-sweep procedure, session deletion by UP administrator, and so on)

  • PPP keep alive timer expiry notification

Task ID

Task ID

Operations

config-services

read, write

Examples

This example shows how to specify the limit of notification events sent from cnBNG UP to CP for each second: 


Router#configure
Router(config)#cnbng-nal location 0/0/CPU0 
Router(config-cnbng-nal-local)#up-cp-notification flow-control 70
Router(config-cnbng-nal-local)#commit

Related Commands

Command Description

up-cp-stats flow-control

 Configures flow control feature for statistics events that are sent from cnBNG user plane to control plane. 

up-cp-stats flow-control

To configure flow control feature for statistics events that are sent from cnBNG user plane (UP) to control plane (CP), use the up-cp-stats flow-control command in cnbng-nal configuration mode. To remove the configuration, use the no form of this command.

up-cp-stats flow-control limit

Syntax Description

limit

Specifies the maximum number of statistics events to be sent from cnBNG UP to CP for each second.

The limit ranges from 20 to 500; default being 150.

Command Default

Disabled, by default.

Command Modes

cnbng-nal

Command History

Release

Modification

Release 7.4.2

This command was introduced

Usage Guidelines

This command is common for IPoE, PPPoE-PTA, and PPPoE-LAC sessions.

The statistics events covered under this flow control feature include locally generated messages like, subscriber session or service periodic statistics notification, that are sent from UP to CP.

Task ID

Task ID

Operations

config-services

read, write

Examples

This example shows how to specify the limit of statistics events sent from cnBNG UP to CP for each second: 


Router#configure
Router(config)#cnbng-nal location 0/0/CPU0 
Router(config-cnbng-nal-local)#up-cp-stats flow-control 70
Router(config-cnbng-nal-local)#commit

Related Commands

Command Description

up-cp-notification flow-control

 Configures flow control feature for notification events sent from cnBNG user plane to control plane. 

up-server

To configure the server details of the user plane for cloud native BNG (cnBNG), use the up-server command in cnbng-nal configuration mode. To remove this configuration, use the no form of this command.

up-server ipv4 ipv4-address [ gtp-port gtp-port-num ] [ pfcp-port pfcp-port-num ] [ vrf default ]

Syntax Description

ipv4 ipv4-address

Specifies the IPv4 address of the user plane server.
gtp-port gtp-port-num

Specifies the source GPRS Tunneling Protocol (GTP) port number of the user plane server.

The range is 15002 to 15051.
pfcp-port pfcp-port-num

Specifies the source Packet Forwarding Control Protocol (PFCP) port number of the user plane server.

The range is 15002 to 15051.
vrf default

Configures the default VRF of the user plane server.

Command Default

None

Command Modes

cnbng-nal

Command History

Release Modification

Release 7.3.1

This command was introduced.

Usage Guidelines

No specific guidelines impact the use of this command.

Task ID

Task ID Operation
config-services

read, write

Examples

This example shows how to configure the UP server details of cnBNG: 


Router(config)#cnbng-nal location 0/1/CPU0
Router(config-cnbng-nal)#up-server ipv4 192.0.2.1 gtp-port 15002 pfcp-port 15003 vrf default
Router(config-cnbng-nal)#commit