BFD for IPv6
Cisco IOS XR software supports bidirectional forwarding detection (BFD) for both IPv4 and IPv6. Bidirectional
forwarding detection (BFD) for IPv6 supports the verification of live connectivity on interfaces that use IPv6
addresses.
The live connectivity verification for both IPv4 and IPv6 interfaces is performed by the same services and
processes. Both IPv4 and IPv6 BFD sessions can run simultaneously on the same line card.
The same features and configurations that are supported in BFD for IPv4 are also supported in BFD for IPv6
BFD on Bundled VLANs
BFD for IPv4 on bundled VLANS is supported using static routing, IS-IS, and OSPF. When running a BFD
session on a bundled VLAN interface, the BFD session is active as long as the VLAN bundle is up.
As long as the VLAN bundle is active, the following events do not cause the BFD session to fail:
•
Failure of a component link.
•
Online insertion and removal (OIR) of a line card which hosts one or more of the component links.
•
Addition of a component link (by configuration) to the bundle.
•
Removal of a component link (by configuration) from the bundle.
•
Shutdown of a component link.
•
RP switchover.
For more information on configuring a VLAN bundle, see the Configuring Link Bundling
on the Cisco ASR 9000 Series Router module.
Note
Keep the following in mind when configuring BFD over bundled VLANs:
•
In the case of an RP switchover, configured next-hops are registered in the Routing Information Base
(RIB).
•
In the case of a BFD restart, static routes remain in the RIB. BFD sessions are reestablished when BFD
restarts.
Static BFD sessions are supported on peers with address prefixes whose next-hops are
directly connected to the router.
Note
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
OL-30423-03 187
Implementing BFD
BFD for IPv6
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