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  • 1.  SRX Cluster to L3/L2 Switch

    Posted 05-01-2017 13:03

    Hello guys,


    Looking to implement intervlan routing, using an SRX 550 (cluster) and a cisco L3 switch, what is Junipers design recommendation SRX on a stick or RVI ?


    Thank you

  • 2.  RE: SRX Cluster to L3/L2 Switch

    Posted 05-01-2017 14:29

    to shed more light on my previous post, the reth 0 is our LAN facing interface. For the implentation i hope to configure  SVIs on the cisco 3850 and have the subnets advertised to the SRX which is the Edge device on the network through a static route and a physical connection from the routed interface on the 3850 with an IP address of to the Reth interface of the SRX ip address The issue is having the SRX talk to the 3850, am wondering if LACP is a viable option, and what the configuration on the Reth interface will look like.

  • 3.  RE: SRX Cluster to L3/L2 Switch

    Posted 05-01-2017 14:55

    My apologies, IP address of the reth interfaces is

  • 4.  RE: SRX Cluster to L3/L2 Switch

    Posted 05-01-2017 16:28

    You should follow the first example design in this document begining on page 10,


    1) Basic Active/Standby scenario


  • 5.  RE: SRX Cluster to L3/L2 Switch
    Best Answer

    Posted 05-02-2017 05:45

    Thank you so much....Will go through the doc right away.

  • 6.  RE: SRX Cluster to L3/L2 Switch

    Posted 05-02-2017 09:51

    Went through the document, port Agreggation accross a cluster wont be possible and since the Reth interface supports sub interfaces and vlan tagging, I would have to go with SRX  on a stick as my only alternative for intervlan routing. 

  • 7.  RE: SRX Cluster to L3/L2 Switch

    Posted 09-19-2021 11:48
    Hi Erdem,

    I came across your request which is similar to my requirement, having SRX cluster connected with reth interface to cisco 3850 switch. so is this design not possible to achieve?

    your response is highly appreciated.