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Tuning and optimizing IPv6 IS-IS networks
Configuration prerequisites
Before you tune and optimize IPv6 IS-IS networks, complete basic IPv6 IS-IS tasks.
Assigning a convergence priority to IPv6 IS-IS routes
A topology change causes IS-IS routing convergence. To improve convergence speed, you can
assign convergence priorities to IPv6 IS-IS routes. Convergence priority levels are critical, high,
medium, and low. The higher the convergence priority, the faster the convergence speed.
By default, IPv6 IS-IS host routes have medium convergence priority, and other IPv6 IS-IS routes
have low convergence priority.
To assign a convergence priority to specific IPv6 IS-IS routes:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter IS-IS view.
isis
[ process-id ] [
vpn-instance
vpn-instance-name ]
N/A
3. Assign a convergence
priority to specific IPv6 IS-IS
routes.
ipv6 priority
{
critical
|
high
|
medium
} {
prefix-list
prefix-list-name |
tag
tag-value }
By default, IPv6 IS-IS routes,
except IPv6 IS-IS host routes,
have the low convergence priority.
Configuring BFD for IPv6 IS-IS
Bidirectional forwarding detection (BFD) can quickly detect faults between IPv6 IS-IS neighbors to
improve the convergence speed of IPv6 IS-IS. For more information about BFD, see High Availability
Configuration Guide.
To configure BFD for IPv6 IS-IS:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enable an IS-IS process and
enter IS-IS view.
isis
[ process-id ] [
vpn-instance
vpn-instance-name ]
N/A
3. Configure the NET for the
IS-IS process.
network-entity
net
By default, no NET is configured.
4. Enable IPv6 for the IS-IS
process.
ipv6 enable
By default, IPv6 for the IS-IS
process is disabled.
5. Return to system view.
quit
N/A
6. Enter interface view.
interface
interface-type
interface-number
N/A
7. Enable IPv6 for IS-IS on the
interface.
isis ipv6 enable
[ process-id ]
By default, IPv6 is disabled for
IS-IS on an interface.
8. Enable BFD for IPv6 IS-IS.
isis ipv6 bfd enable
By default, BFD for IPv6 IS-IS is
disabled.
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