mld-snooping-show
Multicast Listener Discovery (MLD) is a Layer 3 multicast protocol used between IPv6 hosts and routers similar to how IGMP is used for IPv4. MLD snooping allows a switch to examine MLD packets and make forwarding decisions based on their content.
MLD snooping constrains IPv6 multicast traffic at Layer 2 by configuring Layer 2 LAN ports dynamically to forward IPv6 multicast traffic only to those ports that want to receive it.
When MLD Snooping is not configured multicast traffic, by default, is forwarded to all the switch ports thus impacting switch performance.
Syntax mld-snooping-show
Defaults None.
Access CLI
History
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Version 2.3 |
Command introduced. |
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Version 2.4 |
The parameters, version and snoop-link, introduced. |
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Version 2.5.2 |
The parameters, version, snoop-linklocal, and snoop-nd deprecated. The parameters, mldv1-vlans, mldv2-vlans, snoop-linklocal-vlans, and snoop-nd-vlans introduced. |
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Version 3.1.0 |
The parameters, query-interval and query-max-response-time, added. |
Usage The default behavior, when MLD Snooping is not configured, multicast traffic is forwarded to all the switch ports, impacting switch performance.
Examples To display the format for all options for the local switch, use the following command:
CLI network-admin@switch > mld-snooping-show format all
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switch: |
switch name |
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enable: |
yes |
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mlvdv1-vlans |
none |
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mldv2-vlans |
1-4092 |
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snoop-linklocal-vlans |
1-4092 |
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snoop-nd-vlans |
1-4092 |
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nvOS-managed-vlans |
100 |
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interop-v1-vlans |
none |
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vlans |
1-99,101-4092 |