408
Enabling automatic link cost calculation
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.
Specify an IS-IS cost style.
cost-style
{
wide
|
wide-compatible
}
By default, the IS-IS cost style is
narrow
.
4.
Enter IPv6 address family
view.
address-family ipv6
[
unicast
]
N/A
5.
Enable IPv6 IS-IS MTR.
multi-topology
[
compatible
]
By default, IPv6 IS-IS MTR is
disabled.
6.
Enable automatic IPv6
IS-IS cost calculation.
auto-cost enable
By default, automatic IPv6 IS-IS cost
calculation is disabled.
7.
(Optional.) Configure a
bandwidth reference value
for automatic IPv6 IS-IS
cost calculation.
bandwidth-reference
value
The default setting is 100 Mbps.
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.
Specify an IS-IS cost style.
cost-style
{
wide
|
wide-compatible | compatible
}
By default, the IS-IS cost style is
narrow
.
4.
Enter IPv6 address family
view.
address-family ipv6
[
unicast
]
N/A
5.
Enable IPv6 IS-IS MTR.
multi-topology
[
compatible
]
By default, IPv6 IS-IS MTR is
disabled.
