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VXLAN/EVPN - Anycast Gateway

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  • 1.  VXLAN/EVPN - Anycast Gateway

    Posted 07-14-2020 16:28

    I'm trying to configure VXLAN/EVPN for the Evolved Campus Core. I'm using EX4600 switches.

     

    I've seen in some documentation that this config is needed:

    set protocols evpn default-gateway do-not-advertise

     

    However, this does not exist on my device. I tried it in vLabs too, and it does not exist on the MX routers there either.

    I've also found that some guides do not refer to this command at all.

    (eg, https://www.juniper.net/documentation/en_US/release-independent/nce/topics/example/nce-172-evpn-vxlan-campus-example.html)

     

    Can anyone tell me why this is? Is it on by default in newer versions of Junos? Or have I missed something critical?

     

     

    Thanks



  • 2.  RE: VXLAN/EVPN - Anycast Gateway

     
    Posted 07-14-2020 18:30

     

    Hey

     

     

     

     

     

     

     

     

     

    If this solves your problem, please mark this post as "Accepted Solution" so we can help others too \:)/

     

    Regards,

     

    Lil Dexx
    JNCIE-ENT#863, 3X JNCIP-[SP-ENT-DC], 4X JNCIA [cloud-DevOps-Junos-Design], Champions Ingenius, SSYB



  • 3.  RE: VXLAN/EVPN - Anycast Gateway

    Posted 07-14-2020 20:18

    It's just that this doesn't exist at all on my switch.

    Good to know its optional though



  • 4.  RE: VXLAN/EVPN - Anycast Gateway

     
    Posted 07-15-2020 02:11

    Hello Luke,

     

    this command seems to be only available as part of a routing-instance:

     

    {master:0}[edit]

    # show protocols evpn
    ##
    ## Warning: statement ignored: unsupported platform (qfx5100-48t-6q)
    ##
    default-gateway do-not-advertise;

     

     

    {master:0}[edit]
    # show routing-instances TEST
    protocols {
    evpn {
    default-gateway do-not-advertise;
    }
    }

     

    This can be seen here (page 10):

    https://www.juniper.net/documentation/en_US/release-independent/solutions/information-products/pathway-pages/solutions/l3gw-vmto-evpn-vxlan-mpls.pdf



  • 5.  RE: VXLAN/EVPN - Anycast Gateway

    Posted 07-15-2020 15:11

    I didn't realise that! Hopefully that solves the issue, thanks.



  • 6.  RE: VXLAN/EVPN - Anycast Gateway

    Posted 07-14-2020 19:10

    If your device is a L3 EVPN gateway and you don't want it to advertise the default gateway associated with it as EVPN type 2 routes then you would need  'do-not-advertise' knob to be in place otherwise by default the L3 EVPN GW advertises its GW IP address as EVPN type 2 route.

     

    It's not a compulsory knob rather used when required as mentioned above.



  • 7.  RE: VXLAN/EVPN - Anycast Gateway
    Best Answer

    Posted 07-15-2020 08:15

    Hi Luke,

     

    L3 gateway for evpn is not supported for EX 4600 on this release.

     

    https://apps.juniper.net/feature-explorer/feature-info.html?fKey=7926&fn=Layer%203%20connectivity%20in%20an%20EVPN-VXLAN%20topology

     

    It`s supported for these EX devices starting with these JUNOS releases.

     

    4650-48Y
    Junos OS 18.4R2
    EX9200
    Junos OS 14.2R1
    EX9200-VC
    Junos OS 14.2R1
    EX9251
    Junos OS 18.1R1
    EX9253
    Junos OS 18.2R1
     
    If this solves your problem, please consider to mark this post as "Accepted Solution".
    Best Regards,
    Mohamed


  • 8.  RE: VXLAN/EVPN - Anycast Gateway

    Posted 07-15-2020 15:08

    If I'm reading this right, the EX4600 can't route between VNIs at all. Is that right?

    I'm just wondering what the point of the anycast gateway is then?

     

    Thanks