Cisco 10000 - Manual (Page 143)

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Cisco 10000 Series Router Software Configuration Guide
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Chapter 4 Configuring Multiprotocol Label Switching
IPv6 VPN over MPLS
Using BGP Route Refresh, an MP-BGP speaker (PE and/or CE) can request another BGP speaker
to resend its MP-BGP updates.
For information on configuring this feature, see the Configuring BGP section in the Configuring
BGP chapter of the Cisco IOS IP Configuration Guide, Release 12.2 Guide at:
http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfbgp.html
• Route Target Rewrite at AS Boundary
The 6VPE feature supports the Route Target Rewrite at AS Boundary feature in the same way as the
feature is currently supported by IPv4 VPNs.
For information on configuring this feature, see the Inter-AS RT-Rewrite section in the Spanning
Multiple Autonomous Systems chapter of the Cisco IP Solution Center MPLS VPN User Guide, 5.0
at:
http://www.cisco.com/en/US/docs/net_mgmt/ip_solution_center/5.0.1/mpls_vpn/user/guide/multa
uto.html#wp631364
• BGP Multipath
The 6VPE feature supports eBGP Multipath, iBGP Multipath, eiBGP Multipath and the
DMZ-link-bandwidth based load-balancing for IPv6 VPNs in the VPN-IPv6 address family. Load
balancing is supported in the same way as they are currently supported by IPv4 VPNs in the
VPN-IPv4 address family.
Note The 6VPE feature does not support per-packet load sharing.
For information on configuring this feature, see the How to Configure BGP Multipath Load Sharing
for Both eBGP and iBGP in an MPLS-VPN section in the BGP Multipath Load Sharing for Both
eBGP and iBGP in an MPLS-VPN guide at:
http://www.cisco.com/en/US/docs/ios/iproute/configuration/guide/irp_bgp_ebgp_ibgp.html#wp10
54087
• VRF-aware BGP Dampening
The 6VPE feature supports the same per-VRF BGP dampening mechanism as the one supported for
IPv4 VPN, so that BGP Dampening can be separately controlled for each VRF.
For information on configuring this feature, see the Configuring Route Dampening section in the
Configuring Internal BGP Features chapter of the Cisco IOS IP Routing Protocols Configuration
Guide, Release 12.4 at:
http://www.cisco.com/en/US/docs/ios/12_4/ip_route/configuration/guide/1cfbgph.html#wp100239
5
IPv6 Internet Access
Most VPN sites require access to the Internet. The following Internet access models are supported by
IPv6 VPNs for enabling VPN access to the Internet:
• Model 1: Non-VRF Internet Access case.
In some VPNs, one or more of the sites can obtain Internet access using an Internet gateway, such
as a firewall, attached to a non-VRF interface to an Internet service provider (ISP). The ISP may or
may not be the same organization as the service provider (SP) that is providing the VPN service.
Traffic to or from the Internet gateway can be routed according to the PE router's default forwarding
table.