Configure Static Neighbor Discovery Protocol Entries(IPv6 only).

07/21/2023 7 People found this article helpful 486,363 Views

Description

The Neighbor Discovery Protocol (NDP) is a messaging protocol that was created as part of IPv6 to perform a number of the tasks that ICMP and ARP are able to accomplish with IPv4.Just like ARP, Neighbor Discovery builds a cache of dynamic entries, and you can configure static Neighbor Discovery entries. The IPv4/IPv6 neighbour table shows the IPv6 neighbour messages and functions that are analogous to the traditional IPv4 neighbour messages.

Configure static Neighbor Discovery Protocol when neighbor cannot be dynamically discovered (e.g. the neighbor appliance does not properly support NDP).

The firewall is directly connected to an IPv6 appliance and there are no entries in the NDP cache table as following.

Under this situation, the neighbor is unreachable.

Hereby, we can configure a static NDP entry for IPv6 traffic.

Resolution

Resolution for SonicOS 7.X

This release includes significant user interface changes and many new features that are different from the SonicOS 6.5 and earlier firmware. The below resolution is for customers using SonicOS 7.X firmware.

The Static NDP feature allows fo rstatic mappings to be created between a layer 3 IPv6 address and a Layer 2 MAC address

To add a Static NDP entry:

Navigate to the NETWORK | System > Neighbor Discovery page

Under the Static NDP Entries table, click + Add. The Add Static NDP dialog displays.

In the IP address field, enter the IPv6 address for the remote device.
From Interface, select the interface on the SonicWallappliance that is used for the entry.
In the MAC Address field, enter the MAC address of the remote device.
Click Add. The Static NDP Entry is added.

Resolution for SonicOS 6.2 and Below

The below resolution is for customers using SonicOS 6.2 and earlier firmware. For firewalls that are generation 6 and newer we suggest to upgrade to the latest general release of SonicOS 6.5 firmware.

Navigate to Network | Neighbor Discovery page.

Step 1: Click on Add button of Static NDP Entries.

In the IP Address field, enter the IPv6 address for the remote device.
In the Interface pulldown menu, select the interface on the firewall that will be used for the entry.
In the MAC Address field, enter the MAC address of the remote device.
Click OK.

The neighbor was manually configured as a static neighbor.

Step 2: Go to System | Diagnostics page
Ping the Neighbor, the static NDP entry takes effect.