Skip to main content
pbarbieri
pbarbieri
Visitor III
November 15, 2022
Solved

Upstream IF

  • November 15, 2022
  • 2 replies
  • 2301 views

Hello

When I execute  the command for a multicast address for instance : "get router info multicast PIM dense-mode table 239.2.10.10"  the Upstream IF is not what I attend and the the upstream state is pruned.

My  logical configuration (see the picture) is composed by 4 nodes  (firewall 600D) PIM enabled using  between them GRE tunnels  in a HUB and SPOKE architecture. Each Spoke send multicast packet to both HUBs by GRE.

The Upstream IF sometime are not the GRE tunnels that the spokes use to send multicast .

Any  configuration to force  the spokes to use only a specific GRE between spoke to hubs? RPF seems ignore static routing and policies.

Policies and static routing have been configured but RPF neighbor is sometime wrong.  What do I need to use? Policy routing? 

 

 

 

 PIM-GRE.jpg

 

Best answer by Anthony_E

Hello parbieri,

 

I hope you are good :)! 

Thank you for using the Community Forum.

 

As usual, I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.


Regards,

2 replies

Anthony_E
Staff
Anthony_EAnswer
Staff
November 17, 2022

Hello parbieri,

 

I hope you are good :)! 

Thank you for using the Community Forum.

 

As usual, I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.


Regards,

Best Regards
pbarbieri
pbarbieriAuthor
Visitor III
November 19, 2022

Thank you very much ! Very useful for troubleshooting. I found the solution, the clients was not able to join the multicast group in good manner. PIM was not to work correctly. I forced inside the firewall the instructions to join the group:

config router multicast-flow     edit {name}     # Configure multicast-flow.         set name {string}   Name. size[35]         set comments {string}   Comment. size[127]         config flows             edit {id}             # Multicast-flow entries.                 set id {integer}   Flow ID. range[0-4294967295]                 set group-addr {ipv4 address any}   Multicast group IP address.                 set source-addr {ipv4 address any}   Multicast source IP address.             next     next end

 

    Anthony_E
    Staff
    Anthony_E
    Staff
    November 18, 2022

    Hello parbieri,

     

    I have found this KB article:

     

    https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-troubleshoot-IGMP-and-PIM-Dense-Mode-issues/ta-p/212914

     

    Could you please tell me if it is helping?

     

    Regards,

    Best Regards
    Terms & ConditionsAccessibility statement