478
3. Configure a tag value on the
interface.
isis ipv6 tag
tag
By default, no tag value is
configured on an interface.
Controlling SPF calculation interval
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.
6. Set the SPF calculation
interval.
timer spf
maximum-interval
[ minimum-interval
[ incremental-interval ] ]
By default:
• The maximum interval is
5 seconds.
• The minimum interval is
50 milliseconds.
• The incremental interval
is 200 milliseconds.
Enabling IPv6 IS-IS ISPF
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.
6. Enable IPv6 IS-IS
ISPF.
ispf enable
By default, IPv6 IS-IS ISPF
is enabled.
Enabling prefix suppression
Perform this task to disable an interface from advertising its prefix in LSPs. This enhances network
security by preventing IP routing to the interval nodes and speeds up network convergence.
To enable prefix suppression:
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