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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:
Ste
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:
Ste
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.
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