Configuring route advertisement

Configure route advertisement in IPv6 for neighbor discovery (ND).

Before you begin

Change the VRF instance as required to configure route advertisement on a specific VRF instance. Not all parameters are configurable on non-default VRFs.

About this task

IPv6 nodes on the same link use ND to discover link-layer addresses and to obtain and advertise various network parameters and reachability information. ND combines the services provided by Address Resolution Protocol (ARP) and router discovery for IPv4.

Note

You only use the ND level configuration when you want to create advertised values that differ from the interface values for reachable-time, retransmit-timer, mtu, or hop-limit.

You can also configure an IPv6 interface for a brouter port through the Edit > Port > IPv6 navigation path, and for a VLAN through the VLAN > VLANs > Basic > IPv6 navigation path. This procedure uses the main IPv6 navigation path where you can configure both types of interfaces.

Procedure

In the navigation tree, expand the following folders: Configuration > IPv6.
Click IPv6.
Click the Route Advertisement tab.
Double-click a parameter to change the current value.

You cannot modify the parameters in gray shading.
Click Apply.

Route Advertisement field descriptions

Use the data in the following table to use the Route Advertisement tab.


Name	Description
Interface	Specifies the interface to which this entry applies.
SendAdverts	Specifies whether the router sends periodic router advertisements and responds to router solicitations on this interface. The default is True.
UseDefaultVal	Specifies one included value to use the default value, or use all bits to configure all options to their default value.
MaxInterval	Specifies the maximum interval (in seconds) at which the transmission of route advertisements occurs on this interface. The value must be between 4 seconds and 1800 seconds. The default is 600.
MinInterval	Specifies the minimum interval (in seconds) at which the transmission of route advertisements occurs on this interface. The value must be between 3 seconds and 0.75 x max-interval. The default is 200.
ReachableTime	Shows a value (in milliseconds) placed in the router advertisement message sent by the router. The value zero means unspecified (by this system). Configure the amount of time that a remote IPv6 node is considered reachable after a reachability confirmation event. You cannot modify this parameter; use the Interfaces tab to change the value for the interface.
RetransmitTime	Shows a value (in milliseconds) placed in the retransmit timer field in the router advertisement message sent from this interface. The value zero means unspecified (by this system). The value configures the amount of time the system waits for the transmission to occur. You cannot modify this parameter; use the Interfaces tab to change the value for the interface.
DefaultLifeTime	Specifies a value placed in the router lifetime field of router advertisements sent from this interface. This value must be either 0 or between 4 and 9000 seconds. A value of zero indicates that the system is not a default router. The default is 1800.
CurHopLimit	Specifies the current hop limit field sent in router advertisements from this interface. The value must be the current diameter of the Internet. A value of zero indicates that the advertisement does not specify a value for CurHopLimit. The default is 64.
ManagedFlag	Enables the system to configure the M-bit or managed address configuration in the router advertisements. The default is false.
DadNsNum	Specifies the number of neighbor solicitation messages for duplicate address detection (DAD). A value of 0 disables the DAD process on this interface. A value of 1 sends one advertisement without retransmissions.
LinkMTU	Shows the MTU value sent in router advertisements on this interface. A value of zero indicates that the system sends no MTU options.
OtherConfigFlag	Enables the O-bit (other stateful configuration) in the router advertisement. Other stateful configuration autoconfigures received information without addresses. The default is disabled.