Configuring MLD in Gaia Clish

Important:

In a Cluster Two or more Security Gateways that work together in a redundant configuration - High Availability, or Load Sharing., you must configure all the Cluster Members in the same way.
MLD functions only in conjunction with a multicast routing protocol to calculate a multicast distribution tree.

Configure IPv6 PIM.

To see the available "set" commands for MLD, enter in Gaia Clish The name of the default command line shell in Check Point Gaia operating system. This is a restricted shell (role-based administration controls the number of commands available in the shell).:

set ipv6 mld[Esc][Esc]

To see the available "show" commands for MLD, enter in Gaia Check Point security operating system that combines the strengths of both SecurePlatform and IPSO operating systems. Clish:

show ipv6 mld[Esc][Esc]

See Monitoring and Troubleshooting MLD.

Workflow:

If necessary to use the MLD version 2, then configure it on the required interface.
Configure other applicable MLD settings.

Syntax for configuring MLD

set ipv6 mld interface <Name of Interface>

default

last-listener-query-count {<1-255> | default}

last-listener-query-interval {<1-25> | default}

local-group <IPv6 Multicast Address> {on | off}

loss-robustness {<2-7> | default}

query-interval {<1-3600> | default}

query-response-interval {<1-25> | default}

startup-query-count {<1-255> | default}

startup-query-interval {<1-31744> | default}

static-group <IPv6 Multicast Address>

group-count <1-512> group-increment <IPv6 Unicast Address> {on | off}

{on | off}

source <IPv6 Address>

{on | off}

source-count <1-512> source-increment <IPv6 Unicast Address> {on | off}

source-all-off

version {1 | 2}

Parameters for configuring MLD

Parameter

Description

<Name of Interface>

Specifies the interface that listens for MLD protocol messages.

default

Resets the MLD settings to default values.

last-listener-query-count {<1-255> | default}

Configures the last listener query count.

This is the number of Multicast-Address-Specific Queries sent before the router assumes there are no remaining listeners for an address on a link.

Range: 1-255

Default: The value of the parameter "loss-robustness"

last-listener-query-interval {<1-25> | default}

Configures the last listener query interval.

This nterval controls:

The Maximum Response Delay inserted into Multicast-Address-Specific Queries sent in response to the "Done" messages.
The time between Multicast-Address-Specific Query messages.

You can change this value to fine-tune the "leave latency" of the link.

A reduced value results in reduced time to detect the departure of the last listener for an address.

Range: 1-25 seconds

Default: 1 second

local-group <IPv6 Multicast Address> {on | off}

Configures the interface to be a receiver of multicast data for the given address.

Local group configuration provides a mechanism to simulate the presence of local receivers on the interface.

When a local group is added, MLD sends a membership report for the group on the interface.

loss-robustness {<2-7> | default}

Configures the loss robustness - the expected number of packet losses on a link.

If the link is expected to be lossy, you can increase this value.

MLD is robust to this level of packet losses: "loss-robustness value" - 1.

Range: 2-7 packets

Default: 2 packets

query-interval {<1-3600> | default}

Configures the interface MLD query interval.

This is the interval between General Queries sent by the Querier.

Larger values cause MLD Queries to be sent less often.

Range: 1-360 seconds

Default: 125 seconds

query-response-interval {<1-25> | default}

Configures the maximum delay for hosts to respond to an MLD membership query.

Range: 1-25 seconds

Default: 10 seconds

startup-query-count {<1-255> | default}

Configures the number of MLD queries sent out on startup, sent with the intervals as configured in the parameter "startup-query-interval".

Range: 1-255

Default: The value of the parameter "loss-robustness"

startup-query-interval {<1-31744> | default}

Configures the interval between General Queries sent by a Querier upon startup.

Range: 1-31744 seconds

Default: The value of the parmeter "query-interval" divided by 4 (and rounded up)

static-group <IPv6 Multicast Address> {on | off}

Configures the local membership for a multicast group.

Static group configuration provides a mechanism to simulate the presence of local receivers on the interface.

When a static group is configured on an interface, the parent protocol (for example, PIM) is notified of the presence of a local receiver.

group-count <1-512> group-increment <IPv6 Unicast Address> {on | off}

group-count

Enables static membership for a set of N adjacent groups at the same time.

Range: 1-512

Default: 1
group-increment

Controls the increment between groups.

Range: None

Default: ::1

source <IPv6 Multicast Address> {on | off}

Configures the multicast sources from which to receive traffic for this group.

Notes:

This parameter is supported only for the MLD version 2.

To configure this parameter, you must first enable the MLD version 2 on the specific interface.
Source-specific joins will only forward traffic that arrives from specific sources, and was sent to the specified multicast group.

source-count <1-512> source-increment <IPv6 Unicast Address> {on | off}

source-count

Enables static membership for a set of N adjacent sources at the same time.

Range: 1-512

Default: 1
source-increment

Controls the increment between sources.

Range: None

Default: ::1

source-all-off

Disables all source-specific configuration for the specified multicast group and returns to default behaviour of forwarding all traffic for this multicast group onto this interface.

version {1 | 2}

Configures the MLD protocol version.

Range: 1, or 2

Default: 1