Carrier Grade IPv6 without Service Modules

This module describes how to implement the Carrier Grade IPv6 (CGv6) without Services Modules.

MAP-E without service modules

This feature configures Mapping of Address and Portal-Encapsulation Mode (MAP-E) CGN solution without service cards (ISM or VSM). The CGN application directly interacts with the line cards to configure MAP-E.

Restrictions for Configuring MAP-E without Service Card on Cisco IOS XR

MAP-E is supported only on the third generation of Cisco ASR 9000 Series Ethernet line cards.
MAP-E without service cards can be enabled only in a default VRF.
If MAP-E or MAP-T is enabled on an interface, other policy based routing (PBR) features such as CLI PBR, BGP Flow Spec, One Platform Kit (onePK), OpenFlow, ingress ACLs and BNG are not supported. This is because only one PBR policy is allowed on the interface per direction.
In a router, only one mode of either inline-service with service card or inline-service without service card is supported.

Types of exception packets handled only by Service Module:

IPv6 extension headers.
V4/V6 fragmented packets.
ICMP messages (excluding ICMP echo message and reply packets, which are processed by the inline interface for MAP-E)
TCP Maximum Segment Size and Path MTU checks.
Packets with Loose Source Route (LSR) and Strict Source Route (SSR) IPv4 options

Configuring MAP-E without service modules

This feature allows to configure Mapping of Address and Portal-Encapsulation Mode (MAP-E) CGN solution without service cards (ISM or VSM). The CGN application directly interacts with the line cards to configure MAP-E.

Configuring MAP-E instances without service modules

Perform these tasks to configure MAP-E without service modules.

SUMMARY STEPS

configure
service cgv6 instance-name
service-inlineinterface-name
service-type map-e instance-name
end or commit

DETAILED STEPS

Command or Action Purpose

Step 1

configure

Example:

RP/0/RSP0/CPU0:routerco# configure

Enters global configuration mode.

Step 2

service cgv6 instance-name

Example:

RP/0/RSP0/CPU0:router(config)# service
Cgv6 cgv6-1
RP/0/RSP0/CPU0:router(config-cgv6)#

Configures the instance for the CGv6 application and enters CGv6 configuration mode.

Note

The maximum number of CGv6 applications allowed for a MAP-E instance is 6.

Step 3

service-inlineinterface-name

Example:

RP/0/RSP0/CPU0:router(config-cgv6)#Service-inline interface TenGigE0/0/0/0

Configures the service-inline interface.

Step 4

service-type map-e instance-name

Example:

RP/0/RSP0/CPU0:router(config-cgv6) #service-type map-e map1
RP/0/RSP0/CPU0:router(config-cgV6-map_e)#

Configures the service type keyword definition for CGv6 MAP-E application.

Step 5

end or commit

Example:

RP/0/RSP0/CPU0:router(config-cgv6-map_e)# end
or
RP/0/RSP0/CPU0:router(config-cgv6-map_e)# Commit

Saves configuration changes.

When you issue the end command, the system prompts you to commit changes:
```
Uncommitted changes found, commit them before exiting (yes/no/cancel)?
[cancel]:
```
- Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode.
- Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes.
- Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.
Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Configuring cpe domain parameters without service modules

Perform this task to configure cpe domain interface for MAP-E without service modules.

SUMMARY STEPS

configure
service cgv6 instance-name
service-inline interface-name
service-type map-e instance-name
cpe-domain ipv4 prefix ipv4 adress/prefix cpe-domain ipv6 prefix ipv6 adress/prefix
end or commit

DETAILED STEPS

	Command or Action	Purpose
Step 1	configure Example: `RP/0/RSP0/CPU0:routerco# configure`	Enters global configuration mode.
Step 2	service cgv6 `instance-name` Example: `RP/0/RSP0/CPU0:router(config)# service Cgv6 cgv6-1 RP/0/RSP0/CPU0:router(config-cgv6)#`	Configures the instance for the CGv6 application and enters CGv6 configuration mode.
Step 3	service-inline `interface-name` Example: `RP/0/RSP0/CPU0:router(config-cgv6)#Service-inline interface TenGigE0/0/0/0`	Configures the service-inline interface.
Step 4	service-type map-e `instance-name` Example: `RP/0/RSP0/CPU0:router(config-cgv6) #service-type map-e map1 RP/0/RSP0/CPU0:router(config-cgV6-map_e)#`	Configures the service type keyword definition for CGv6 MAP-E application.
Step 5	cpe-domain ipv4 prefix `ipv4 adress/prefix` cpe-domain ipv6 prefix `ipv6 adress/prefix` Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)#cpe-domain ipv4 prefix 120.2.1.0/24 RP/0/RSP0/CPU0:router(config-cgv6-map_e)#cpe-domain ipv6 prefix 9020:da8:2::/48`	Configures the IPv4 or IPv6 prefixes of the CPE domain parameter without service modules.
Step 6	end or commit Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)# end or RP/0/RSP0/CPU0:router(config-cgv6-map_e)# Commit`	Saves configuration changes. When you issue the end command, the system prompts you to commit changes: `Uncommitted changes found, commit them before exiting (yes/no/cancel)? [cancel]:` Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode. Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes. Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes. Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Configuring port sharing ratio and contiguous port without service modules

Perform this task to configure port sharing ratio and contiguous port.

SUMMARY STEPS

configure
service cgv6 instance-name
service-inline interface-name
service-type map-e instance-name
cpe-domain ipv4 prefix ipv4 adress/prefix cpe-domain ipv6 prefix ipv6 adress/prefix
sharing-ration 256
contiguous-port 16
end or commit

DETAILED STEPS

	Command or Action	Purpose
Step 1	configure Example: `RP/0/RSP0/CPU0:routerco# configure`	Enters global configuration mode.
Step 2	service cgv6 `instance-name` Example: `RP/0/RSP0/CPU0:router(config)# service Cgv6 cgv6-1 RP/0/RSP0/CPU0:router(config-cgv6)#`	Configures the instance for the CGv6 application and enters CGv6 configuration mode.
Step 3	service-inline `interface-name` Example: `RP/0/RSP0/CPU0:router(config-cgv6)#Service-inline interface TenGigE0/0/0/0`	Configures the service-inline interface.
Step 4	service-type map-e `instance-name` Example: `RP/0/RSP0/CPU0:router(config-cgv6) #service-type map-e map1 RP/0/RSP0/CPU0:router(config-cgV6-map_e)#`	Configures the service type keyword definition for CGv6 MAP-E application.
Step 5	cpe-domain ipv4 prefix `ipv4 adress/prefix` cpe-domain ipv6 prefix `ipv6 adress/prefix` Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)#cpe-domain ipv4 prefix 120.2.1.0/24 RP/0/RSP0/CPU0:router(config-cgv6-map_e)#cpe-domain ipv6 prefix 9020:da8:2::/48`	Configures the IPv4 or IPv6 prefixes of the CPE domain parameter without service modules.
Step 6	sharing-ration 256 Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)#sharing-ratio 256`	Configures the port sharing ratio. The value for the port sharing ratio is 256.
Step 7	contiguous-port 16 Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)#contiguous-ports 16`	Configures the contiguous port. The value for the contiguous port is 16.
Step 8	end or commit Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)# end or RP/0/RSP0/CPU0:router(config-cgv6-map_e)# Commit`	Saves configuration changes. When you issue the end command, the system prompts you to commit changes: `Uncommitted changes found, commit them before exiting (yes/no/cancel)? [cancel]:` Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode. Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes. Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes. Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Configuring BR Endpoint Address without modules

Perform this task to configure the BR Endpoint Address without service modules.

SUMMARY STEPS

configure
service cgv6 instance-name
service-inline interface-name
service-type map-e instance-name
cpe-domain ipv4 prefix ipv4 adress/prefix cpe-domain ipv6 prefix ipv6 adress/prefix
sharing-ration 256
contiguous-port 16
br-endpoint-adress
endor commit

DETAILED STEPS

	Command or Action	Purpose
Step 1	configure Example: `RP/0/RSP0/CPU0:routerco# configure`	Enters global configuration mode.
Step 2	service cgv6 `instance-name` Example: `RP/0/RSP0/CPU0:router(config)# service Cgv6 cgv6-1 RP/0/RSP0/CPU0:router(config-cgv6)#`	Configures the instance for the CGv6 application and enters CGv6 configuration mode.
Step 3	service-inline `interface-name` Example: `RP/0/RSP0/CPU0:router(config-cgv6)#Service-inline interface TenGigE0/0/0/0`	Configures the service-inline interface.
Step 4	service-type map-e `instance-name` Example: `RP/0/RSP0/CPU0:router(config-cgv6) #service-type map-e map1 RP/0/RSP0/CPU0:router(config-cgV6-map_e)#`	Configures the service type keyword definition for CGv6 MAP-E application.
Step 5	cpe-domain ipv4 prefix `ipv4 adress/prefix` cpe-domain ipv6 prefix `ipv6 adress/prefix` Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)#cpe-domain ipv4 prefix 120.2.1.0/24 RP/0/RSP0/CPU0:router(config-cgv6-map_e)#cpe-domain ipv6 prefix 9020:da8:2::/48`	Configures the IPv4 or IPv6 prefixes of the CPE domain parameter without service modules.
Step 6	sharing-ration 256 Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)#sharing-ratio 256`	Configures the port sharing ratio. The value for the port sharing ratio is 256.
Step 7	contiguous-port 16 Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)#contiguous-ports 16`	Configures the contiguous port. The value for the contiguous port is 16.
Step 8	br-endpoint-adress Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)#br-endpoint-address 9020:da8:2:ffff::1`	Configures the br-endpoint-address.
Step 9	endor commit Example: `RP/0/RSP0/CPU0:router(config-cgv6-map_e)# end or RP/0/RSP0/CPU0:router(config-cgv6-map_e)# Commit`	Saves configuration changes. When you issue the end command, the system prompts you to commit changes: `Uncommitted changes found, commit them before exiting (yes/no/cancel)? [cancel]:` Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to EXEC mode. Entering no exits the configuration session and returns the router to EXEC mode without committing the configuration changes. Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes. Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

MAP-T without Service Cards

The objective of this feature is to ensure that the Mapping of Address and Port-Translation Mode (MAP-T) CGN solution can be implemented without service cards (VSM/ISM). With this feature, the CGN application directly interacts with the line cards to configure the MAP-T parameters and eliminates the dependency on the service cards.

Restrictions for Configuring MAP-T without Service Card on Cisco IOS XR

MAP-T is supported only on Cisco ASR 9000 Series 400G and 200G Modular Line Cards and Cisco ASR 9000 Series 4-Port and 8-Port 100 Gigabit Ethernet Line Cards.
MAP-T without service cards can be enabled only in an L3VPN and a 6VPE cloud set-up.
If this feature is enabled on an interface, other PBR (policy based routing) features such as CLI PBR, BGP Flow Spec, One Platform Kit (onePK) or OpenFlow may not be functional; this is because only one PBR policy will be allowed on the interface.
In a router, only one mode of either inline-service with service card or inline-service without service card will be supported.
At a router level, the max scale limit for CPE domain parameters is 25 and for external domain parameters is 8k. If a single MAP-T instance has utilized 25 of CPE domain and 8k of external domain parameters; it is not possible to configure additional CPE and external domain parameters in the same router.

Configuring MAP-T without Service Cards

To configure a MAP-T without service cards, perform the steps below.

SUMMARY STEPS

configure
service cgv6 instance-name
service-inline interface type interface-path-id
service-type map-t-ciscoinstance-name
cpe-domain ipv4 prefix length value
cpe-domain ipv6 vrf vrf-name
cpe-domain ipv6 prefix length value
sharing rationumber
contiguous-portsnumber
cpe-domain-name cpe-domain-name ipv4 prefix address/prefix ipv6 prefix address/prefix
ext-domain-name ext-domain-name ipv6 prefix address/prefix ipv4-vrf vrf-name
Use the commit or end command.
show policy-map transient type pbr
show pbr service-node table summary

DETAILED STEPS

Command or Action Purpose

Step 1

configure

Example:

RP/0/RP0/CPU0:router# configure

Enters global configuration mode.

Step 2

service cgv6 instance-name

Example:

RP/0/RP0/CPU0:router(config)# service cgv6 cgv6-1
RP/0/RP0/CPU0:router(config-cgv6)#

Configures the instance for the CGv6 application and enters CGv6 configuration mode.

Note

The maximum number of CGv6 applications allowed for a MAP-T instance is 6.

Step 3

service-inline interface type interface-path-id

Example:

RP/0/RP0/CPU0:router(config-cgv6)# service-inline interface TenGigE0/0/0/0/0
RP/0/RP0/CPU0:router(config-cgv6)#

Specifies an Ethernet interface on which the CGv6 service must be enabled.

Step 4

service-type map-t-ciscoinstance-name

Example:

RP/0/RP0/CPU0:router(config-cgv6)# service-type map-t-cisco map1

Configures the service type keyword definition for CGv6 MAP-T application.

application.

Step 5

cpe-domain ipv4 prefix length value

Example:

RP/0/RP0/CPU0:router(config-cgn-map-t-cisco)# cpe-domain ipv4 prefix length 24

Configures the IPv4 prefix of the CPE domain

Step 6

cpe-domain ipv6 vrf vrf-name

Example:

RP/0/RP0/CPU0:router(config-cgn-map-t-cisco)# cpe-domain ipv6 vrf mapt-v6

Enables Virtual Routing and Forwarding (VRF) for the MAP-T configuration.

Step 7

cpe-domain ipv6 prefix length value

Example:

RP/0/RP0/CPU0:router(config-cgn-map-t-cisco)#cpe-domain ipv6 prefix length 48

Assigns a value for the ipv6-prefix length to be used as part of the MAP-T instance.

Step 8

sharing rationumber

Example:

RP/0/RP0/CPU0:router(config-cgn-map-t-cisco)#sharing-ratio 256

Enters global configuration mode.

Step 9

contiguous-portsnumber

Example:

RP/0/RP0/CPU0:router(config-cgn-map-t-cisco)#contiguous-ports 8

Specifies the Port Set ID (PSID) configuration.

Step 10

cpe-domain-name cpe-domain-name ipv4 prefix address/prefix ipv6 prefix address/prefix

Example:

RP/0/RP0/CPU0:router(config-cgn-map-t-cisco)#cpe-domain-name cpe1 ipv4-prefix 10.0.0.1 ipv6-prefix 1000:1000::1

Configures IPv4 and IPv6 prefix for a specific CPE domain.

Step 11

ext-domain-name ext-domain-name ipv6 prefix address/prefix ipv4-vrf vrf-name

Example:

RP/0/RP0/CPU0:router(config-cgn-map-t-cisco)#ext-domain-name ext1 ipv6-prefix 2000:2000::1/48 ipv4-vrf mapt

Configures IPv6 prefix and IPv4 VRF for the external domain.

Step 12

Use the commit or end command.

commit —Saves the configuration changes and remains within the configuration session.

end —Prompts user to take one of these actions:

Yes — Saves configuration changes and exits the configuration session.
No —Exits the configuration session without committing the configuration changes.
Cancel —Remains in the configuration session, without committing the configuration changes.

Step 13

show policy-map transient type pbr

Example:

RP/0/RP0/CPU0:router#show policy-map transient type pbr

Displays the transient list type pbr of the policy-map.

Step 14

show pbr service-node table summary

Example:

RP/0/RP0/CPU0:router#show pbr service-node table summary

Displays the output for the class-maps.

Configuration Example

The following example shows the configuration of MAP-T without service cards:

RP/0/RP0/CPU0:router#show running-config service cgv6 cgv6-1
service cgv6 cgv6-1
service-inline interface Bundle-Ether2
service-type map-t-cisco mapt1
  cpe-domain ipv4 prefix length 24
  cpe-domain ipv6 vrf SVRF-003
  sharing-ratio 256
  contiguous-ports 8
  cpe-domain-name cpe1 ipv4-prefix 192.1.1.0 ipv6-prefix 2301:d01:1122::
  ext-domain-name ext1 ipv6-prefix 3301:d01:1122::/48 ipv4-vrf VRF-1
!
!

The following example shows the running configuration of MAP-T without service cards:

The following example shows the verification output:

RP/0/RP0/CPU0:router#show policy-map transient type pbr
policy-map type pbr CGN_0
handle:0x38000002
table description: L3 IPv4 and IPv6
class handle:0x78000003  sequence 1
   match destination-address ipv4 192.1.1.0 255.255.255.0--->should match the cpe domain IPV4 address and mask
  punt service-node index 1001 app-id 0 local-id 0xfa1
! 
 class handle:0x78000004  sequence 1
   match destination-address ipv6 3301:d01:1122::/48--->should match the ext domain IPV6 address and mask
  punt service-node index 2001 app-id 0 local-id 0x1771
! 
 class handle:0xf8000002  sequence 4294967295 (class-default)
! 
 end-policy-map

The following example shows the output for the class-maps:

RP/0/RP0/CPU0:router#show pbr service-node table summary 

Service node count: 4
nodeid node0_RSP1_CPU0
_____________________________________
 Name         VIdx         Enc
_____________________________________
 CGN_1001           1001   cgn
 CGN_3001           3001   cgn
 CGN_5001           5001   cgn
 CGN_7001           7001   cgn

CGv6 Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x

Bias-Free Language

Results

Chapter: Carrier Grade IPv6 without Service Modules

Carrier Grade IPv6 without Service Modules

MAP-E without service modules

Configuring MAP-E without service modules

Configuring MAP-E instances without service modules

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DETAILED STEPS

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Configuring cpe domain parameters without service modules

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Configuring port sharing ratio and contiguous port without service modules

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Configuring BR Endpoint Address without modules

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MAP-T without Service Cards

Configuring MAP-T without Service Cards

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Configuration Example

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