Re: [Astlinux-users] WAN Failover static routes primary

[Michael K. <mic...@ip...>]

Cool thanks Lonnie. Actually I can just add this in my routing table startup script as this route will not go anywhere else.
I thought there was something a little more tricky at work! 

Regards
Michael Knill

On 24/7/18, 12:53 am, "Lonnie Abelbeck" <li...@lo...> wrote:

    
    > On Jul 23, 2018, at 3:07 AM, Michael Knill <mic...@ip...> wrote:
    > 
    > Hi Group
    >  
    > Is there any way to configure a static route for the primary interface e.g. a route which will not fail over to the secondary?
    > I basically do not want to access my VoIP Provider on the secondary interface e.g. it needs to be unreachable so it fails over to my backup trunk for outgoing calls.
    
    
    > I could put the SIP address in the Target IPv4 Hosts section but that would be my last resort.
    
    Yes, as long as you trust your SIP provider will always echo ICMP, that is not a bad solution.  And as a side-effect it will failover when your SIP provider is not reachable.
    
    If you want a more general method, create a /mnt/kd/wan-failover.script ...
    
    Failover Action Script
    https://doc.astlinux-project.org/userdoc:tt_wan_failover#action_script_optional
    
    **Untested example**
    
    -- /mnt/kd/wan-failover.script --
    #!/bin/sh
    
    ##
    ## wan-failover action script
    ##
    ## Automatically called after any WAN link change
    ##
    state="$1"
    primary_if="$2"
    primary_gw="$3"
    secondary_if="$4"
    secondary_gw="$5"
    secondary_gw_ipv6="$6"
    
    primary_only_routes="1.2.3.4 1.2.3.5 1.2.4.0/24"
    
    case $state in
    
    SECONDARY)
      ## Switched to Failover using secondary WAN link
      for x in $primary_only_routes; do
        ip route add $x ${primary_gw:+via $primary_gw} dev $primary_if
      done
      ;;
    
    PRIMARY)
      ## Switched back to normal using primary WAN link
      for x in $primary_only_routes; do
        ip route delete $x ${primary_gw:+via $primary_gw} dev $primary_if
      done
      ;;
    
    esac
    
    exit 0
    --
    
    This will add routes via the primary interface on failover you want unreachable, and remove them when back to normal to clean things up.
    
    
    Lonnie
    
    
    
    
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