Article ID:723
Objectives
When IPv6 hosts configure their network interfaces, they broadcast router solicitation (RS) requests to the network to discover available routers. The Router Advertisement Daemon (RADVD) answers requests with router advertisement (RA) messages. In addition, RADVD periodically broadcasts RA packets to attached links to update network hosts with router availability.
This document guides the user on how to enable the RADVD process and how to choose the proper advertise mode.
Note: Before you proceed with the Router Advertisement Daemon configuration you have to set the routing mode to IPv6. For more information refer to an article titled Routing mode configuration on SA500 Series.
Applicable Devices
• SA540 Security Appliances
Software Version
• 2.2.07
RADVD
Step 1. Log in to the Security Appliance Configuration Utility and choose Networking > IPV6 > Router Advertisement. The RADVD page opens:
Step 2. From the RADVD drop-down list choose Enable to enable RADVD.
Step 3. From the Advertise Mode drop-down list, choose one of the following options:
• Unsolicited Multicast — Sends router advertisements to all interfaces that belong to the multicast group. Multicast is the delivery of a message or information to a group of destination computers simultaneously in a single transmission from the source. If Unsolicited Multicast is chosen, Advertise Interval is highlighted.
• Unicast Only — Sends router advertisements to known IPV6 addresses only. Unicast transmission is the delivery of messages or information to a single network destination identified by a unique address.
Step 4. If Unsolicited Multicast is chosen in Step 3, enter the desired advertise interval value in seconds in the Advertise Interval field. Advertise Interval is the duration between the successive advertisements. The range of this value is 10 - 1800 seconds.
Step 5. In the RA Flags field, check the Managed check box to use administered/stateful protocol for address auto configuration.
Step 6. Check the Other check box to allow the host to use the administered/stateful protocol of non-address information auto.
Step 7. Router preference provides preference metric for default routers. The low, medium and high values are signaled in unused bits in Router Advertisement messages. This feature is useful if there are other RADVD enabled devices on the same LAN, for which then it would be efficient to have priorities. From the Router Preference drop-down list, choose a priority for the device. By default it is High.
Step 8. Enter the desired value in the MTU field. Maximum Transmission Unit (MTU) denotes the maximum size of the packet that can be transmitted on the link. It is measured in bytes. The default size is 1500.
Step 9. Enter the desired time in the Router Lifetime field. The router lifetime is the life time of the route. The value can be either 0 or a value in the range 1800 - 9000 seconds. By default, it is 3600 seconds.
Step 10. Click Apply to save the settings. Or Click Reset to revert the settings.