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  • 1.  multicast group - any way to change it?

    Posted 07-18-2022 20:05
    Hello,

    per my understanding multicast group cannot be changed on Juniper and I see this group on EX4300 239.255.255.255 , but Lightspeed agent network saying:

    Multicast

    • 224.0.0.1:3000 UDP – lsrelayd service
    • 224.0.0.1:5000 UDP – lsfilterd service

    I think they tested with Cisco switches which use the above multicast group. Is there any way to change it to 224.0.0.1 on Juniper?

    Thank you

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    ADAM GROCH
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  • 2.  RE: multicast group - any way to change it?

    Posted 07-19-2022 09:50
    The details will vary depending on the overall multicast configuration but typically you set the desired group range as part of the RP configuration.
    https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/topic-map/mcast-static-rp.html

    [edit routing-instances VPN-A protocols pim rp local]
    user@host# set group-ranges ff70::/12
    user@host# set group-ranges 224.0.0.0/4​
    The check list of all the multicast choices and required end to end configuration, including optional steps, can be found here.

    https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/task/routing-protocol-multicast-security-configuring.html

    ------------------------------
    Steve Puluka BSEET - Juniper Ambassador
    IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP - Retired)
    http://puluka.com/home
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  • 3.  RE: multicast group - any way to change it?

    Posted 07-20-2022 08:16
    Remember that whatever happens, 224.0.0.0/24 is NOT a routable multicast.
    This special /24 is «link local multicast», that is, purely local broadcast using multicast address range as destination/group IP.
    Not routable anyway, purely local to the LAN (well, such beasts can be specifically proxified, but this is not routing and it would be application proxification).


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    Olivier Benghozi
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