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

Formatting Options

format fields-to-display

Display output using a specific parameter. Use all to display all possible output.

parsable-delim character

Display output formatted for machine parsing using a specified delimiter.

sort-asc

Display output in ascending order.

sort-desc

Display output in descending order.

show dups

Display duplicate entries in the output.

layout vertical|horizontal

Format the output in a vertical or horizontal layout.

show-interval seconds-interval

Repeat the show command at a specified interval.

show-headers|
no-show-headers

Display column headers or not.

limit-output number

Limit the display output to a specific number of entries.

count-output

Display the number of entries in the output. This is useful with vRouter show commands.

unscaled

Display full values in the output instead of scaled approximate values.

raw-int-values

Display integer values instead of mapped values

sum-by

Aggregate output by specific parameters. If sum-by fields are specified, records that have the same value in sum-by fields are combined and displayed as one aggregate record. NOTE: This option is only available for show commands that collect statistics such as connection-stats-show.

Defaults   None.

Access   CLI

History   

Version 2.3

Command introduced.

Version 2.4

The parameters, version and snoop-link, introduced.

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.

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

switch:

switch name

enable:

yes

mlvdv1-vlans

none

mldv2-vlans

1-4092

snoop-linklocal-vlans

1-4092

snoop-nd-vlans

1-4092

nvOS-managed-vlans

100

interop-v1-vlans

none

vlans

1-99,101-4092