Huawei Quidway NetEngine80E Configuration Manual page 81

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
ipv6 prefix-limit number { alert-percent [ route-unchanged ] | simply-alert }
A limit is configured on the number of IPv6 public route prefixes.
alert-percent indicates the percentage of the maximum number of IPv6 public route prefixes
that is supported. If you specify alert-percent in the command, when the number of IPv6 public
route prefixes exceeds the value calculated by number x alert-percent/100, an alarm is generated.
Additional IPv6 public route prefixes can still be added to the routing table until the number of
IPv6 public route prefixes reaches number. Subsequent route prefixes are discarded.
If you specify simply-alert in the command, additional IPv6 public route prefixes can still be
added to the routing table and only an alarm is generated after the number of IPv6 public route
prefixes exceeds number. However, when the total number of private and public route prefixes
reaches the limit on the number of unicast route prefixes specified in the PAF file, subsequent
IPv6 public route prefixes are discarded.
If you decrease alert-percent after the number of IPv6 public route prefixes exceeds number,
whether the routing table remains unchanged is determined by route-unchanged.
l If you specify route-unchanged in the command, the routing table remains unchanged.
l If you do not specify route-unchanged in the command, the system deletes the routes from
By default, the system deletes the routes from the routing table and re-adds routes.
Step 3 (Optional) Run:
ipv6 prefix-limit log-interval interval
An interval is specified for the system to generate logs after the number of IPv6 public route
prefixes exceeds the limit.
By default, the system generates logs at an interval of 5s after the number of IPv6 public route
prefixes exceeds the limit.
You can run the command to set a larger value for the interval to decrease the frequency at which
these logs are generated.
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Issue 02 (2014-09-30)
the routing table and re-adds routes.
NOTE
After the number of IPv6 public route prefixes exceeds the limit, note the following rules:
l If you run the ipv6 prefix-limit command to increase number or the undo ipv6 prefix-limit command
to delete the limit, the router relearns IPv6 public route prefixes.
l Direct and static routes can still be added to the IPv6 routing table.
l The snmp-agent trap enable feature-name rm command must have been run so that alarms can be
generated.
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1 IP Routing Basic Configuration
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