Chapter 25 Configuring IPv6 MLD Snooping

Configuring IPv6 MLD Snooping

Default MLD Snooping Configuration

Table 25-1shows the default MLD snooping configuration.

Table 25-1

Default MLD Snooping Configuration

 

 

 

Feature

 

Default Setting

 

 

MLD snooping (Global)

Disabled.

 

 

MLD snooping (per VLAN)

Enabled. MLD snooping must be globally enabled for VLAN

 

 

MLD snooping to take place.

 

 

IPv6 Multicast addresses

None configured.

 

 

IPv6 Multicast router ports

None configured.

 

 

MLD snooping Immediate Leave

Disabled.

 

 

MLD snooping robustness variable

Global: 2; Per VLAN: 0.

 

 

Note The VLAN value overrides the global setting. When the

 

 

VLAN value is 0, the VLAN uses the global count.

 

 

Last listener query count

Global: 2; Per VLAN: 0.

 

 

Note The VLAN value overrides the global setting. When the

 

 

VLAN value is 0, the VLAN uses the global count.

 

 

Last listener query interval

Global: 1000 (1 second); VLAN: 0.

 

 

Note The VLAN value overrides the global setting. When the

 

 

VLAN value is 0, the VLAN uses the global interval.

 

 

TCN query solicit

Disabled.

 

 

TCN query count

2.

 

 

MLD listener suppression

Disabled.

 

 

 

MLD Snooping Configuration Guidelines

When configuring MLD snooping, consider these guidelines:

•You can configure MLD snooping characteristics at any time, but you must globally enable MLD snooping by using the ipv6 mld snooping global configuration command for the configuration to take effect.

•When the IPv6 multicast router is a Catalyst 6500 switch and you are using extended VLANs (in the range 1006 to 4094), IPv6 MLD snooping must be enabled on the extended VLAN on the Catalyst 6500 switch in order for the Catalyst 3750 or Catalyst 3560 switch to receive queries on the VLAN. For normal-range VLANs (1 to 1005), it is not necessary to enable IPv6 MLD snooping on the VLAN on the Catalyst 6500 switch.

•MLD snooping and IGMP snooping act independently of each other. You can enable both features at the same time on the switch.

•The maximum number of multicast entries allowed on the switch or switch stack is determined by the configured SDM template.

•The maximum number of address entries allowed for the switch or switch stack is 1000.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

25-6

OL-9775-02

 

 

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Cisco Systems 3750E manual Default MLD Snooping Configuration, MLD Snooping Configuration Guidelines, 25-6