Cisco WS-C2960-24LC-S Software Guide - Page 594
Configuring MLD Snooping Queries, ipv6 mld snooping robustness-variable
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Configuring IPv6 MLD Snooping Chapter 30 Configuring IPv6 MLD Snooping Configuring MLD Snooping Queries When Immediate Leave is not enabled and a port receives an MLD Done message, the switch generates MASQs on the port and sends them to the IPv6 multicast address for which the Done message was sent. You can optionally configure the number of MASQs that are sent and the length of time the switch waits for a response before deleting the port from the multicast group. Beginning in privileged EXEC mode, follow these steps to configure MLD snooping query characteristics for the switch or for a VLAN: Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Command configure terminal ipv6 mld snooping robustness-variable value ipv6 mld snooping vlan vlan-id robustness-variable value ipv6 mld snooping last-listener-query-count count ipv6 mld snooping vlan vlan-id last-listener-query-count count ipv6 mld snooping last-listener-query-interval interval ipv6 mld snooping vlan vlan-id last-listener-query-interval interval ipv6 mld snooping tcn query solicit ipv6 mld snooping tcn flood query count count end show ipv6 mld snooping querier [vlan vlan-id] copy running-config startup-config Purpose Enter global configuration mode. (Optional) Set the number of queries that are sent before switch will deletes a listener (port) that does not respond to a general query. The range is 1 to 3; the default is 2. (Optional) Set the robustness variable on a VLAN basis, which determines the number of general queries that MLD snooping sends before aging out a multicast address when there is no MLD report response. The range is 1 to 3; the default is 0. When set to 0, the number used is the global robustness variable value. (Optional) Set the number of MASQs that the switch sends before aging out an MLD client. The range is 1 to 7; the default is 2. The queries are sent 1 second apart. (Optional) Set the last-listener query count on a VLAN basis. This value overrides the value configured globally. The range is 1 to 7; the default is 0. When set to 0, the global count value is used. Queries are sent 1 second apart. (Optional) Set the maximum response time that the switch waits after sending out a MASQ before deleting a port from the multicast group. The range is 100 to 32,768 thousands of a second. The default is 1000 (1 second). (Optional) Set the last-listener query interval on a VLAN basis. This value overrides the value configured globally. The range is 0 to 32,768 thousands of a second. The default is 0. When set to 0, the global last-listener query interval is used. (Optional) Enable topology change notification (TCN) solicitation, which means that VLANs flood all IPv6 multicast traffic for the configured number of queries before sending multicast data to only those ports requesting to receive it. The default is for TCN to be disabled. (Optional) When TCN is enabled, specify the number of TCN queries to be sent. The range is from 1 to 10; the default is 2. Return to privileged EXEC mode. (Optional) Verify that the MLD snooping querier information for the switch or for the VLAN. (Optional) Save your entries in the configuration file. 30-10 Catalyst 2960 Switch Software Configuration Guide OL-8603-04