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Enabling BFD for IPv6 IS-IS FRR
By default, IPv6 IS-IS FRR does not use BFD to detect primary link failures. To speed up IPv6 IS-IS
convergence, enable BFD for IPv6 IS-IS FRR to detect primary link failures.
To enable BFD control packet mode for IPv6 IS-IS FRR:
1. Enter system view.
system-view
N/A
2. Enter interface view.
interface
interface-type
interface-number
N/A
3. Enable BFD control packet
mode for IPv6 IS-IS FRR.
isis ipv6 primary-path-detect bfd
ctrl
By default, BFD control packet
mode for IPv6 IS-IS FRR is
disabled.
To enable BFD echo packet mode for IPv6 IS-IS FRR:
1. Enter system view.
system-view
N/A
2. Configure the source IPv6
address of BFD echo packets.
bfd echo-source-ipv6
ip-address
By default, the source IPv6
address of BFD echo packets is
not configured.
The source IPv6 address
cannot be on the same network
segment as any local interface's
IP address.
For more information, see High
Availability Command
Reference.
3. Enter interface view.
interface
interface-type
interface-number
N/A
4. Enable BFD echo packet
mode for IPv6 IS-IS FRR.
isis ipv6 primary-path-detect bfd
echo
By default, BFD echo packet
mode for IPv6 IS-IS FRR is
disabled.
Enabling IPv6 IS-IS MTR
On a network, IPv4 and IPv6 topologies must be consistent so that both IPv6 IS-IS and IPv4 IS-IS
can use the SPF algorithm to perform route calculation. If they are different, routers supporting both
IPv4 and IPv6 might send IPv6 packets to routers that do not support IPv6, resulting in packet loss.
To resolve this issue, configure IPv6 IS-IS Multi-Topology Routing (MTR) to perform route calculation
separately in IPv4 and IPv6 topologies.
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