Cisco Catalyst 3750 User Manual

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Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
ipv6 mld snooping robustness-variable
ipv6 mld snooping robustness-variable
Use the ipv6 mld snooping robustness-variable global configuration command to configure the
number of IP version 6 (IPv6) Multicast Listener Discovery (MLD) queries that the switch sends before
deleting a listener that does not respond, or enter a VLAN ID to configure on a per-VLAN basis. Use
the no form of this command to reset the variable to the default settings.
ipv6 mld snooping [vlan vlan-id] robustness-variable integer_value
no ipv6 mld snooping [vlan vlan-id] robustness-variable
Note This command is available only if you have configured a dual IPv4 and IPv6 Switch Database
Management (SDM) template on the switch.
Syntax Description
Command Default The default global robustness variable (number of queries before deleting a listener) is 2.
The default VLAN robustness variable (number of queries before aging out a multicast address) is 0,
which means that the system uses the global robustness variable for aging out the listener.
Command Modes Global configuration
Command History
Usage Guidelines To configure the dual IPv4 and IPv6 template, enter the sdm prefer dual-ipv4-and-ipv6 {default |
vlan} global configuration command and reload the switch.
Robustness is measured in terms of the number of MLDv1 queries sent with no response before a port
is removed from a multicast group. A port is deleted when there are no MLDv1 reports received for the
configured number of MLDv1 queries. The global value determines the number of queries that the
switch waits before deleting a listener that does not respond and applies to all VLANs that do not have
a VLAN value set.
The robustness value configured for a VLAN overrides the global value. If the VLAN robustness value
is 0 (the default), the global value is used.
VLAN numbers 1002 through 1005 are reserved for Token Ring and FDDI VLANs and cannot be used
in MLD snooping.
vlan vlan-id (Optional) Configure the robustness variable on the specified VLAN. The
VLAN ID range is 1 to 1001 and 1006 to 4094.
integer_value The range is 1 to 3.
Release Modification
12.2(25)SED This command was introduced.

Cisco Catalyst 3750 Specifications

General

Device Type	Switch
Switching Capacity	32 Gbps
Forwarding Rate	38.7 Mpps
Stacking Bandwidth	32 Gbps
RAM	128 MB
Jumbo Frame Support	Yes
Switch Type	Managed
Model	Catalyst 3750 Series
Uplink Interfaces	SFP
Form Factor	Rack-mountable
MAC Address Table Size	12, 000 entries
Routing Protocol	RIP, OSPF, EIGRP
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Layer 3 switching, Layer 2 switching, auto-negotiation, BOOTP support, ARP support, VLAN support, auto-uplink (auto MDI/MDI-X), IGMP snooping, traffic shaping, MAC address filtering, Quality of Service (QoS), Jumbo Frames support, MLD snooping, Dynamic ARP Inspection (DAI), Cisco EnergyWise technology
Power over Ethernet (PoE)	PoE
Operating Temperature	-5 - 45 °C
Operating Humidity	10% to 85% non-condensing