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chrismes
chrismes
New Member
May 29, 2018
Question

PIM-SM routing

  • May 29, 2018
  • 2 replies
  • 8161 views

The PIM-SM routing examples in the "Networking handbook" are not very clear. Why is there added an access-list, which is never used int the config? Has anyone a really working PIM-routing example from practice?

Thanks.

    2 replies

    ericli_FTNT
    Staff
    ericli_FTNT
    Staff
    May 30, 2018

    On Fortigate, to enable multicast routing, you will need to:

    1. 

    config system settings
    set multicast-forward enable
    end

     

    2. 

    config router multicast
    set multicast-routing enable
    end

     

    3. 

    config router multicast
    config pim-sm-global
    config rp-address
    ...
    set ip-address x.x.x.x

     

    4. 

    config router multicast
    config interface
    edit xx
    set pim-mode sparse-mode
    end

     

    5. 

    config firewall multicast-policy

     

    Here are some trouble shooting commands:

     

    get router info multicast pim sparse-mode table x.x.x.x
    get router info multicast pim sparse-mode neighbour
    diagnose ip multicast mroute
    get router info multicast igmp groups
    get router info multicast pim sparse-mode interface
    get router info multicast pim sparse-mode rp-mapping
    get router info multicast pim sparse-mode bsr-info 
    diagnose sys mcast-session list

     

    Follow up with this thread with any question please. Thanks!

    topcu
    topcu
    Explorer
    January 15, 2019

    chrismes wrote:

    Why is there added an access-list, which is never used int the config?

    Hi, chrismes asked for the purpose of the access-list in the fortinet configuraion guide. Honestly, this was also not absolutely clear for me, because the ACL ist not referenced somewhere else in one documentation.

     

    http://help.fortinet.com/...%20a%20static%20RP.htm

     

    But I know, that an RP can be restricted to specific Multicastgroups via an ACL. I found another configuration Guide with the following configuration example:

     

    https://pub.kb.fortinet.com/ksmcontent/Fortinet-Public/current/Fortigate_v4.0/From_TD/FortiGate_Multicast_Tech_Note_01-400-96951-20090521.pdf

     

    The ACL defines a filter to the multicastgroup 233.254.200.0

    config router access-list  edit "Source-RP"   config rule    edit 1     set prefix 233.254.200.0 255.255.255.0     set exact-match disable next

     

    In another step, the ACL is bound to teh RP:

    config router multicast  config interface   edit "internal"    set pim-mode sparse-mode     config igmp      set version 2  end next  edit "external"   set pim-mode sparse-mode    config igmp    set version 2  end next end  set multicast-routing enable   config pim-sm-global    config rp-address     edit 1      set ip-address 169.254.100.1      set group "Source-RP" next

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