Cisco SA520-K9 Administration Guide - Page 87

Networking Configuring IPv6 Addressing 2 MLD Tunnels Multicast Listener Discovery (MLD) is an IPv6 protocol that discovers listeners for a specific multicast group. This protocol is similar to IGMP in IPv4. STEP 1 Click Networking > IPv6 > MLD Tunnels. The MLD Tunnels window opens. STEP 2 Check the box to enable MLD when this router is in IPv6 mode. Then enter the following information: • Maximum query response time: Enter the maximum amount of time (in milliseconds) that can elapse between this router sending a host-query message and the host replying back to it. By varying the Query Response Interval, an administrator can tune the burstiness of MLD messages on the link; larger values make the traffic less bursty, as host responses are spread out over a larger interval. The minimum value of this parameter is 5000 ms (5 seconds) and maximum value is 1800000 ms (30 mins). • Robustness Variable: Enter a value from 2 to 8 to allow tuning for the expected packet loss on a link. Enter a higher value if a link is expected to be lossy. The default value is 2. The minimum value of Robustness Variable is 2 and maximum value is 8. • Query Interval: Enter the number of seconds to elapse between General Queries sent by the device. The default value is 125 seconds. By varying the Query Interval, an administrator can tune the number of MLD messages on the link; larger values cause MLD Queries to be sent less often. The minimum value of Query interval is 100 seconds and maximum value is 1800 seconds. STEP 3 Click Apply to save your settings. Cisco SA500 Series Security Appliances Administration Guide 87