- Implementing IPv6 Addressing and Basic Connectivity
- Implementing ADSL and Deploying Dial Access for IPv6
- Implementing Bidirectional Forwarding Detection for IPv6
- Implementing Multiprotocol BGP for IPv6
- Implementing DHCP for IPv6
- Implementing EIGRP for IPv6
- Configuring First Hop Redundancy Protocols in IPv6
- Implementing IS-IS for IPv6
- Implementing IPv6 for Network Management
- Implementing Mobile IPv6
- Implementing IPv6 Multicast
- PIMv6 Anycast RP Solution
- Netflow v9 for IPv6
- Implementing OSPFv3
- Implementing IPv6 over MPLS
- Implementing IPv6 VPN over MPLS
- Implementing QoS for IPv6
- Implementing RIP for IPv6
- Implementing Selective Packet Discard in IPv6
- Implementing Static Routes for IPv6
- Implementing Traffic Filters and Firewalls for IPv6 Security
- Implementing Tunneling for IPv6
PIMv6 Anycast RP Solution
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.
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.
Information About the PIMv6 Anycast RP Solution
PIMv6 Anycast RP Solution
The anycast RP solution in IPv6 PIM allows an IPv6 network to support anycast services for the PIM-SM RP. It allows anycast RP to be used inside a domain that runs PIM only. This feature is useful when interdomain connection is not required.
Anycast RP is a mechanism that ISP-based backbones use to get fast convergence when a PIM RP router fails. To allow receivers and sources to rendezvous to the closest RP, the packets from a source need to get to all RPs to find joined receivers.
A unicast IP address is chosen as the RP address. This address is statically configured, or distributed using a dynamic protocol, to all PIM routers throughout the domain. A set of routers in the domain is chosen to act as RPs for this RP address; these routers are called the anycast RP set. Each router in the anycast RP set is configured with a loopback interface using the RP address. Each router in the Anycast RP set also needs a separate physical IP address to be used for communication between the RPs.
The RP address, or a prefix that covers the RP address, is injected into the unicast routing system inside of the domain. Each router in the anycast RP set is configured with the addresses of all other routers in the anycast RP set, and this configuration must be consistent in all RPs in the set.
PIMv6 Anycast RP Normal Operation
- RP1, RP2, RP3 and RP4 are members in the same anycast RP group.
- S11 and S31 are sources that use RP1 and RP3, respectively, based on their unicast routing metric.
- R11, R12, R2, R31 and R32 are receivers. Based on their unicast routing metrics, R11 and R12 join to RP1, R2 joins to RP2 and R31, and R32 joins to RP3, respectively.
The following sequence of events occurs when S11 starts sending packets:
- DR1 creates (S,G) states and sends a register to RP1. DR1 may also encapsulate the data packet in the register.
- Upon receiving the register, RP1 performs normal PIM-SM RP functionality, and forwards the packets to R11 and R12.
- RP1 also sends the register (which may encapsulate the data packets) to RP2, RP3, and RP4.
- RP2, RP3, and RP4 do not further forward the register to each other.
- RP2, RP3, and RP4 perform normal PIM-SM RP functionality, and if there is a data packet encapsulated, RP2 forwards the data packet to R2 and RP3 to R31 and R32, respectively.
- The previous five steps repeat for null registers sent by DR1.
PIMv6 Anycast RP Failover
The following illustration shows PIM anycast RP failover.
In this way, the loss of the RP (RP1 in this case) is transparent to DR1, R11, and R12, and the network can converge as soon as the IGP is converged.
How to Configure the PIMv6 Anycast RP Solution
Configuring PIMv6 Anycast RP
This task describes how to configure two PIMv6 anycast RP peers. Steps 1 through 8 show configuration for RP1, and steps 9 through 16 show configuration for RP2.
DETAILED STEPS
| Command or Action | Purpose | |
|---|---|---|
|
|
Example: Router# ipv6 pim rp-address 2001:DB8::1:1 acl_sparse1 |
Configures the address of a PIM RP for a particular group range. |
|
|
Example: Router(config-if)# interface Loopback4 |
Specifies an interface type and number, and places the router in interface configuration mode. |
|
|
Example: Router(config-if)# ipv6 address 2001:DB8::4:4 |
Configures an IPv6 address based on an IPv6 general prefix and enable IPv6 processing on an interface. |
|
|
Example: Router(config-if)# no shut |
|
|
|
Example: Router(config-if)# interface Loopback5 |
Specifies an interface type and number, and places the router in interface configuration mode. |
|
|
Example: Router(config-if)# ipv6 address 2001:DB8::1:1 |
Configures an IPv6 address based on an IPv6 general prefix and enable IPv6 processing on an interface. |
|
|
Example: Router(config-if)# no shut |
|
|
|
Example: Router(config)# ipv6 pim anycast-rp 2001:DB8::1:1 2001:DB8::3:3 |
|
|
|
Example: Router# ipv6 pim rp-address 2001:DB8::1:1 acl_sparse1 |
Configures the address of a PIM RP for a particular group range. |
|
|
Example: Router(config-if)# interface Loopback4 |
Specifies an interface type and number, and places the router in interface configuration mode. |
|
|
Example: Router(config-if)# ipv6 address 2001:DB8::3:3 |
Configures an IPv6 address based on an IPv6 general prefix and enable IPv6 processing on an interface. |
|
|
Example: Router(config-if)# no shut |
|
|
|
Example: Router(config-if)# interface Loopback5 |
Specifies an interface type and number, and places the router in interface configuration mode. |
|
|
Example: Router(config-if)# ipv6 address 2001:DB8::1:1 |
Configures an IPv6 address based on an IPv6 general prefix and enable IPv6 processing on an interface. |
|
|
Example: Router(config-if)# no shut |
|
|
|
Example: Router(config)# ipv6 pim anycast-rp 2001:DB8::1:1 2001:DB8::4:4 |
Configuration Examples for PIMv6 Anycast RP
Example: Configuring PIMv6 Anycast RP
RP1 Router1(config)#ipv6 pim rp-address 2001:DB8::1:1 acl_sparse1 Router1(config)# interface Loopback4 Router1(config-if)# ipv6 address 2001:DB8::4:4 Router1(config-if)# no shut Router1(config)# interface Loopback5 Router1(config-if)# ipv6 address 2001:DB8::1:1 Router1(config-if)# no shut Router1(config)# ipv6 pim anycast-rp 2001:DB8::1:1 2001:DB8::3:3 RP2 (Anycast RP peer) Router2(config)# ipv6 pim rp-address 2001:DB8::1:1 acl_sparse1 Router2(config)# interface Loopback4 Router2(config-if)# ipv6 address 2001:DB8::3:3 Router2(config-if)# no shut Router2(config)# interface Loopback5 Router2(config-if)# ipv6 address 2001:DB8::1:1 Router2(config-if)# no shut Router2(config)# ipv6 pim anycast-rp 2001:DB8::1:1 2001:DB8::4:4
show ipv6 pim anycast-rp 2001:DB8::1:1
Anycast RP Peers For 2001:DB8::1:1 Last Register/Register-Stop received
2001:DB8::3:3 00:00:00/00:00:00
2001:DB8::4:4 00:00:00/00:00:00
Additional References
Related Documents
| Related Topic | Document Title |
|---|---|
| Cisco IOS commands |
|
| IPv6 commands |
|
| Cisco IOS IPv6 features |
Cisco_IOS_IPv6_Feature_Mapping |
Standards and RFCs
| Standard/RFC | Title |
|---|---|
| RFC 4610 |
Anycast-RP Using Protocol Independent Multicast (PIM) |
Technical Assistance
| 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. |
Feature Information for the PIMv6 Anycast RP Solution
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.
| Table 1 | Feature Information for the PIMv6: Anycast RP Solution |
| Feature Name | Releases | Feature Information |
|---|---|---|
| PIMv6: Anycast RP Solution |
15.1(3)S Cisco IOS XE Release 3.4S |
The anycast RP solution in IPv6 PIM allows an IPv6 network to support anycast services for the PIM-SM RP. It allows anycast RP to be used inside a domain that runs PIM only. The following commands were introduced or modified: ipv6 pim anycast-RP, show ipv6 pim anycast-RP. |
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)
Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.
Feedback