Displays IGMP snooping information for a specific VLAN.

show ip multicast vlan [ cluster ] vlan-id
cluster
Specifies a Multi-Chassis Trunking (MCT) cluster.
vlan-id
Specifies the VLAN for which you want information. If you do not specify a vlan-id, information for all VLANs is displayed.

Privileged EXEC mode

You can use the show ip multicast vlan command to display the querier information for a VLAN. This command displays the VLAN interface status and whether there is any other querier present with the lowest IP address. The following list provides the combinations of querier possibilities:

  • Active Interface with no other querier present
  • Passive Interface with no other querier present
  • Active Interface with other querier present
  • Passive Interface with other querier present

The show ip multicast vlan command displays the following information:

Output Field

Description

Version

The global IGMP version.

Query

How often a querier sends a general query on the interface.

Group Age

The number of seconds membership groups can be members of this group before aging out.

Max Resp

The maximum number of seconds a client waits before replying to a query.

Other Qr

How long it took a switch with a lower IP address to become a new querier.

Unregistered IPv4 Multicast Packets Flooding

Indicates whether flooding is enabled.

cfg

The IGMP version for the specified VLAN.

vlan cfg

The IGMP configuration mode, which is either passive or active.

pimsm

Indicates that PIM SM is enabled on the VLAN.

rtr port

The router ports, which are the ports receiving queries.

local

Entries learned on local interfaces of the cluster switch, for example, the local client edge port (CCEP) or cluster edge port (CEP).

mct peer

Entries learned by way of the MCT peer cluster switch. Control messages synchronize by way of the inter-chassis link (ICL) from the MCT peer cluster switch.

The following example shows IGMP snooping information when the VLAN interface is active and no other querier is present with the lowest IP address. 


device> show ip multicast vlan 11

Version=2, Intervals: Query=300, Group Age=620, Max Resp=10, Other Qr=605,
                      Leave Wait=2, Robustness=2

VL11: dft V2, vlan cfg active, 20 grp, 0 (*G) cache, no rtr port, 
  My Query address: 1.1.1.1 (ve/loopback)
  e1/2/2    has   20 grp, QR, default V2
    group: 225.1.11.14, life = 520
    group: 225.1.11.6, life = 520
    group: 225.1.11.12, life = 520
    group: 225.1.11.16, life = 520
  lg203     has    0 grp, QR, default V2 trunk
  e31/2/1   has    0 grp, QR, default V2

The following example shows IGMP snooping information when the VLAN interface is passive and no other querier is present with the lowest IP address. 


device> show ip multicast vlan 11

Version=2, Intervals: Query=125, Group Age=260, Max Resp=10, Other Qr=255,
                      Leave Wait=2, Robustness=2

VL11: dft V2, vlan cfg passive, 0 grp, 0 (*G) cache, no rtr port, 
  My Query address: 186.186.186.186 (ve/loopback)
  e1/1/11   has    0 grp, non-QR (passive), default V2
  e1/1/15   has    0 grp, non-QR (passive), default V2

The following example shows IGMP snooping information when the VLAN interface is active and another querier is present with the lowest IP address. 


device> show ip multicast vlan 11
Version=2, Intervals: Query=125, Group Age=260, Max Resp=10, Other Qr=255,
                      Leave Wait=2, Robustness=2

VL11: dft V2, vlan cfg active, 0 grp, 0 (*G) cache, rtr ports, 
    router ports: lg203(160) 1.1.1.1, 
  My Query address: 4.4.4.4 (ve/loopback)
  e1/2/8    has    0 grp, QR, default V2
  lg203     has    0 grp, non-QR (QR=1.1.1.1, age=100, mrt=100), default V2 trunk
Release version Command history
08.0.20 This command was modified to display MCT cluster information.
08.0.30 This command was modified to display flooding information.
08.0.50 The output of this command was updated to include the My Query address field.