I've been noticing for a while now that there has been this message popping up in the logs of one of my routers, exactly once a minute stating the error:
%IGMP-4-NO_INPUT: VRF xx: IGMP packet without input interface received from 188.8.131.52 for 184.108.40.206 -Process= "IGMP Input"
where the recieved address is the tunnel address of the dmvpn tunnel that we use to connect to remote sites.
Multicast is not one of my strong suits and I haven't been able to find much material online relating to this specific area, anyone have any ideas what kinds of things could produce an error like this consistently?
The 220.127.116.11 IP is the all-hosts group multicast. So something is trying to start a multicast message. A few questions:
Do you have a VRF and if so is the interface coming in on a VRF or global table?
Is that IP a public IP for your DMVPN crypto portion - or is it a Private IP coming through the tunnel for LAN traffic?
If it is LAN related is it an IP you can track down?
Your right that there isn't much information out there on that specific error code (that is helpful anyways). I would suggest looking at the other information in the logs to help direct you to another troubleshooting step.
do you have "ip multicast routing" enabled?
are you using "ip pim sparse-dense mode"
what does "show ip igmp snooping" give you?
show ip mroute summary
Debugs you could try - just not all at once :D
debug ip mroute
debug ip igmp
debug ip pim
debug ip mpacket
Please don't forget to rate any helpful post.
_____________________________________ There are no great limits to growth because there are no limits of human intelligence, imagination, and wonder. - Ronald Reagan
Agile Networking with Cloud-managed IT [Meraki The Future is here] Cisco Meraki The Future Is Here: Agile Networking With Cloud-managed IT Your customer’s employees are in hybrid workstyle from home, the road, and the office and IT teams need t...
1. Smart Licensing
1.1. What is Smart Licensing?
A. Cisco Smart Licensing is a flexible licensing model that provides you with an easier, faster, and more consistent way to purchase and manage software across the Cisco portfolio and across your orga...
Cisco DNA - Cisco SD-WAN: Connect to any cloud, anywhere, securely Cisco offers on-prem and cloud-managed WAN edge solutions to meet these new demands. Connect any user to any application with integrated capabilities for multicloud, security, ...
Join us for this virtual event as cloud providers, integrators, ecosystem technology partners and customers discuss what tomorrow's cloud will be and what you need to know to prepare. Get ready to hear about innovations for faster operations, mult...
Let´s talk about spanning-treeLeave your comment in english and in your own language.------------------------------------------------Vamos falar sobre spanning-tree Deixe seu comentário em inglês e no seu idioma.