25-4
Cisco ASA 5500 Series Configuration Guide using ASDM
OL-20339-01
Chapter 25 Configuring IPv6 Neighbor Discovery
Configuring Neighbor Solicitation Messages
Feature History for the Neighbor Solicitation Message Interval
Table 25-2 lists the release history for this feature.
Configuring the Neighbor Reachable Time
This section includes the following topics:
• Information About Neighbor Reachable Time, page 25-4
• Licensing Requirements for Neighbor Reachable Time, page 25-4
• Guidelines and Limitations for Neighbor Reachable Time, page 25-4
• Default Settings for the Neighbor Reachable Time, page 25-5
• Configuring Neighbor Reachable Time, page 25-5
• Feature History for Neighbor Reachable Time, page 25-8
Information About Neighbor Reachable Time
The neighbor reachable time enables detecting unavailable neighbors. Shorter configured times enable
detecting unavailable neighbors more quickly, however, shorter times consume more IPv6 network
bandwidth and processing resources in all IPv6 network devices. Very short configured times are not
recommended in normal IPv6 operation.
Licensing Requirements for Neighbor Reachable Time
The following table shows the licensing requirements for this feature:
Guidelines and Limitations for Neighbor Reachable Time
This section includes the guidelines and limitations for this feature.
Context Mode Guidelines
Supported in single and multiple context mode.
Firewall Mode Guidelines
Supported in routed mode only. Transparent mode is not supported.
Table 25-2 Feature History for Neighbor Solicitation Message Interval
Feature Name Releases Feature Information
Neighbor solicitation message interval 7.0(1) The feature was introduced.
The ipv6 nd ns-interval command was introduced.
Model License Requirement
All models Base License.
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