The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and 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 module.
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.
To facilitate managed central services in a Multiprotocol Label Switching (MPLS)-based network, DHCPv6 must be made MPLS-aware so that a single resource can be used to serve multiple VPNs instead of dedicating a resource to a single VPN.
The DHCPv6 server implementation of MPLS VPN allows a per-pool configuration so that DHCPv6 pools can be associated with a VPN routing and forwarding (VRF) instance. The DHCPv6 server differentiates clients from various VRFs and assigns an IPv6 prefix accordingly from the respective VRF pools. Meanwhile, the DHCPv6 bindings store the clients’ VRF information.
The DHCPv6 relay implementation allows the configuration of the destination VRF instance to which the relay messages will be forwarded. The relay adds the client’s VPN information while forwarding the client’s DHCPv6 requests toward the server, and the relay agent then processes the client’s VPN information in reply packets from the server.
The relay agent adds IPv6 static routes for delegated prefixes in corresponding clients’ VRF, and the relay agent’s high availability (HA) functionality synchronizes the VRF information while synchronizing static routes created by the relay process.
The DHCPv6 relay and server VRF-aware features are disabled by default.
Note | You do not have to configure this feature on specified interfaces. If you want the feature to be enabled globally only on a device, perform steps 1, 2, and 3 |
1.
enable
2.
configure
terminal
3.
ipv6
dhcp-relay
option
vpn
4.
interface
type
number
5.
ipv6
dhcp
relay
option
vpn
6.
ipv6
dhcp
relay
destination
ipv6-address [interface-type
interface-number |
vrf
vrf-name |
global]
7.
end
1.
enable
2.
configure
terminal
3.
interface
type
number
4.
ipv6
dhcp
server
vrf
enable
5.
end
Device# show ipv6 dhcp relay binding Relay Bindings associated with default vrf: Prefix: 2001:DB8:0:1::/64 (Ethernet0/0) DUID: 00030001AABBCC006500 IAID: 196609 lifetime: 2592000 expiration: 12:34:28 IST Oct 14 2010 Summary: Total number of Relay bindings = 1 Total number of Relay bindings added by Bulk lease = 0 RELAY#
Device# show ipv6 dhcp binding Client: FE80::A8BB:CCFF:FE00:6400 DUID: 00030001AABBCC006400 VRF : global Interface : Ethernet0/0 IA PD: IA ID 0x00030001, T1 302400, T2 483840 Prefix: 2001::1/64 preferred lifetime 604800, valid lifetime 2592000 expires at Oct 15 2010 03:18 PM (2591143 seconds) Device# show ipv6 route static IPv6 Routing Table - default - 4 entries Codes: C - Connected, L - Local, S - Static, U - Per-user Static route B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2 IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external ND - Neighbor Discovery O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2 ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2 S 2001::/64 [1/0] via FE80::A8BB:CCFF:FE00:6400, Ethernet0/0
Related Topic |
Document Title |
---|---|
IPv6 addressing and connectivity |
IPv6 Configuration Guide |
Cisco IOS commands |
|
IPv6 commands |
Cisco IOS IPv6 Command Reference |
Cisco IOS IPv6 features |
Standard/RFC |
Title |
---|---|
RFCs for IPv6 |
IPv6 RFCs |
MIB |
MIBs Link |
---|---|
|
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
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. |
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.
Feature Name |
Releases |
Feature Information |
---|---|---|
DHCPv6 Relay - MPLS VPN Support |
15.2(3)E |
The DHCPv6 relay implementation of MPLS VPN allows configuration of the destination VRF instance to which the relay messages are forwarded. The following commands were introduced or modified: ipv6 dhcp relay destination, ipv6 dhcp relay option vpn, ipv6 dhcp server vrf enable, show ipv6 dhcp relay binding. |
DHCPv6 Server - MPLS VPN Support |
15.2(3)E |
The DHCPv6 server implementation of MPLS VPN allows a per-pool configuration so that DHCPv6 pools can be associated with a VPN routing and forwarding (VRF) instance. The following commands were introduced or modified: ipv6 dhcp relay destination, ipv6 dhcp relay option vpn, ipv6 dhcp server vrf enable, show ipv6 dhcp relay binding. |
VRF Aware DHCPv6 Server and Relay for Prefix Delegation |
15.2(3)E |
The VRF Aware DHCPv6 Server and Relay for Prefix Delegation feature ensures that the DHCPv6 server and relay involved in delegating prefixes are VRF aware. |
VRF aware DHCPv6 server/Relay for IANA |
15.2(3)E |
The VRF aware DHCPv6 server/Relay for IANA feature ensures that the DHCPv6 server and relay used for IP address provision are VRF aware. |
VRF aware DHCPv6 relay |
15.2(3)E |
The VRF aware DHCPv6 relay feature ensures that the DHCPv6 relay involved in forwarding IP addresses is VRF aware. |