Viewing the current IGMP configuration

Syntax:


show ip igmp config

Displays IGMP configuration for all VLANs on the switch.

Syntax:


show ip igmp vlan <vid> config

Displays IGMP configuration for a specific VLAN on the switch, including per-port data.

For IGMP operating status, see the section "Internet Group Management Protocol (IGMP) status" in the chapter "Monitoring and Analyzing Switch Operation" of the Management and Configuration Guide for your switch.

Example:

Suppose that you have the following VLAN and IGMP configurations on the switch:

VLAN ID

VLAN name

IGMP enabled

Querier

1

DEFAULT_VLAN

Yes

No

22

VLAN-2

Yes

Yes

33

VLAN-3

No

Yes

You could use the CLI to display this data as follows:

Listing of IGMP configuration for all VLANs in the switch

switch(vlan-33)# show ip igmp config

 IGMP Service Config

  Control unknown multicast  [Yes] : Yes
  Forced fast leave timeout [0] : 4           
  Delayed flush timeout [0] : 0           
  Look-up Mode [mac] : mac         

  VLAN ID VLAN Name    IGMP Enabled Querier Allowed IGMP Version Querier Interval
  ------- ------------ ------------ --------------- ------------ ----------------
  1       DEFAULT_VLAN Yes          No              2            125             
  22      VLAN22       Yes          Yes             2            125             
  33      VLAN33       No           Yes             2            125  

switch(vlan-33)# show run 

Running configuration:

; JL253A Configuration Editor; Created on release #WC.16.02.0000x
; Ver #0d:13.ef.7c.5f.fc.6b.fb.9f.fc.f3.ff.37.ef:09

hostname "switch-name"
module 1 type jl253a
snmp-server community "public" unrestricted
vlan 1
   name "DEFAULT_VLAN"
   untagged 1-28
   ip address dhcp-bootp
   ip igmp
   no ip igmp querier
   exit
vlan 22
   name "VLAN22"
   no ip address
   ip igmp
   exit
vlan 33
   name "VLAN33"
   no ip address
   exit

The following version of the show ip igmp command includes the VLAN ID (vid) designation, and combines the above data with the IGMP per-port configuration:

Listing of IGMP configuration for a specific VLAN

switch(vlan-22)# show ip igmp vlan 22 config

IGMP Service VLAN Config

  VLAN ID : 22   
  VLAN NAME : VLAN22                          
  IGMP Enabled [No] : Yes
  Querier Allowed [Yes] : Yes
  IGMP Version [2] : 2   
  Strict Mode                         : No   
  Last Member Query Interval (Seconds) [1] : 1   
  Querier Interval [125] : 125 
  Query Max. Response Time (Seconds) [10] : 10  
  Robustness Count [2] : 2   

  Port    Type       | Port Mode Forced Fast Leave Fast Leave
  ------- ---------- + --------- ----------------- ----------
  1       1000T      | Auto      No                Yes       
  2       1000T      | Auto      No                Yes       
  3       1000T      | Blocked   No                Yes       
  4       1000T      | Forward   No                Yes  

1 IGMP configuration for the selected VLAN.

2 IGMP configuration on the individual ports in the VLAN.