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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
different convergence priorities to specific IPv6 IS-IS routes, including critical, high, medium, and low.
The higher the convergence priority, the faster the convergence speed.
By default, IPv6 IS-IS host routes have the medium convergence priority, and other IPv6 IS-IS routes have
the 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 an IS-IS
process.
isis ipv6 enable
[
process-id
]
By default, IPv6 is disabled for an
IS-IS process.