IGMP v1 query received in logs...

  • 0
  • 2
  • Question
  • Updated 6 months ago
  • Answered
In one of our x450-G2-48t-10G switch getting IGMP v1 query continously from the IP address This query is receiving in one particular vlan. We are using 10.x.x.x IP series for this vlan. We don't know where is the source

Apart from this, we are getting packet drop in the same vlan. Is IGMP v1 query cause Packet drop?

Please help us to resolve issue. Thanks.
Photo of Thavamani Shanmugam

Thavamani Shanmugam

  • 690 Points 500 badge 2x thumb

Posted 6 months ago

  • 0
  • 2
Photo of Ronald Dvorak

Ronald Dvorak, Embassador

  • 42,280 Points 20k badge 2x thumb
Please post a screenshot of the log with some of this messages and the output for "show vlan" and which version is running on the switch.
Photo of EtherMAN

EtherMAN, Embassador

  • 6,186 Points 5k badge 2x thumb
Easy way to find this is use wireshark or your favorite sniffer on a switch port where this vlan is untagged .. Find the mac address of and you can track that to it's source port. Sounds like someone plugged a small router into your that vlan somewhere.   

As far as packet loss being caused by this... I doubt it.  Packet loss will need to be narrowed down and looked at as a separate issue  
Photo of Michal Rz

Michal Rz

  • 732 Points 500 badge 2x thumb
Or easiest way imo is to create interface on this vlan with ip 192.168.1.x and check in arp which mac have ip
Photo of Thavamani Shanmugam

Thavamani Shanmugam

  • 690 Points 500 badge 2x thumb
Thanks for the information. We found the source port using arp. After disabling the port there is no IGMP v1 query logs. Thanks. We need to know few things...
1. Is IGMP v1 query cause Packet drop?
2. Source port is not listed while entering "sh iparp vlan". How to identify the client device which is connected the source port.

Thanks for the support.