Extreme Networks EAS 200-24p Switch, Manual

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Extreme Networks EAS 200-24p Switch CLI Manual
381
C H A P T E R
25
IGMP / MLD Snooping
Command List
The Internet Group Management Protocol (IGMP) is a L3 protocol used to manage the membership of
Internet Protocol multicast groups. IGMP is used by IP hosts and adjacent multicast routers to establish
multicast group memberships. IGMP snooping is the process of listening to IGMP network traffic.
IGMP snooping, as implied by the name, is a feature that allows a layer 2 switch to "listen in" on the
IGMP conversation between hosts and routers by processing the layer 3 IGMP packets sent in a
multicast network.
When IGMP snooping is enabled in a switch it analyzes all IGMP packets between hosts connected to
the switch and multicast routers in the network. When a switch hears an IGMP report from a host for a
given multicast group, the switch adds the host's port number to the multicast list for that group. And,
when the switch hears an IGMP Leave, it removes the host's port from the table entry.
The Multicast Listener Discovery (MLD) is used by IPv6 routers to discover multicast listeners on a
directly attached link, much as IGMP is used in IPv4. The protocol is embedded in ICMPv6 instead of
using a separate protocol. MLDv1 is similar to IGMPv2 and MLDv2 similar to IGMPv3.
●
config igmp_snooping [vlan_name <vlan_name 32> | vlanid <vlanid_list> | all]
{state [enable | disable] | fast_leave [enable | disable] | report_suppression
[enable | disable]}(1)
●
config igmp_snooping rate_limit [ports <portlist> | vlanid <vlanid_list>] [<value
1-1000> | no_limit]
●
config igmp_snooping querier [vlan_name <vlan_name 32> | vlanid <vlanid_list> |
all] {query_interval <sec 1-65535> | max_response_time <sec 1-25> |
robustness_variable <value 1-7> | last_member_query_interval <sec 1-25> | state
[enable | disable] | version <value 1-3>}(1)
●
config router_ports [<vlan_name 32> | vlanid <vlanid_list> ] [add | delete]
<portlist>
●
config router_ports_forbidden [ <vlan_name 32> | vlanid <vlanid_list> ] [add |
delete] <portlist>
●
enable igmp_snooping
●
disable igmp_snooping
●
create igmp_snooping static_group [vlan<vlan_name 32> | vlanid <vlanid_list>]
<ipaddr>
●
delete igmp_snooping static_group [vlan<vlan_name 32> | vlanid <vlanid_list>]
<ipaddr>