DNS Load Balancing (Issue with Round Robin Algorithm)

A10 Networks Support Forum Forums Thunder and AX Series General DNS Load Balancing (Issue with Round Robin Algorithm)

This topic contains 1 reply, has 2 voices, and was last updated by avatar ehteshammalik007 3 months ago.

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  • #12132
    avatar
    Morphius
    Member

    Hi

    I’m having some issues with DNS-Load Balncing. I’m using Thunder 3030s (ADC) right now and i’m on a beginner level. The configurations are quite simple (L-4).
    We need to load balance Port-53 Queries between 2 Real Servers. The issue that i’m having is that, when the VIP is hit. The request terminates on both Real Servers at a same time inspite of ROUND ROBIN STRICT or ROUND ROBIN Algorithm.

    Following are the current configurations. It would be great if i can get some guidance concerning to this.

    **********************************************
    interface ethernet 1 (**Towards Internet**)
    enable
    ip address 10.10.10.252 255.255.255.0
    !
    !
    ip route 0.0.0.0 /0 10.10.10.1
    !
    health monitor tcp
    method tcp port 53
    !
    health monitor udp
    method udp port 53
    !
    slb server internal-server 10.10.10.254
    health-check ping
    port 53 tcp
    port 53 udp
    !
    slb server server 212.249.200.135
    health-check ping
    port 53 tcp
    port 53 udp
    !
    slb service-group service-tcp tcp
    method round-robin-strict
    health-check ping
    member internal-server 53
    member server 53
    !
    slb service-group service-udp udp
    method round-robin-strict
    health-check ping
    member internal-server 53
    member server 53

    !
    slb virtual-server DNS-vip 10.10.10.233
    port 53 dns-udp
    name UDP
    source-nat auto
    service-group service-udp
    port 53 dns-tcp
    name TCP
    source-nat auto
    service-group service-tcp
    *****************************************************

    Thanks.

    #12142

    i am also suffering from the same issue when i test DNS(VIP) using nslookup
    against single query 4 hits/connection are established on VIP.
    I dont exactly know the issue right now. Why the VIP is getting 4 HITS against 1-single NSLOOKUP Query.

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