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Health monitor Source IP addresses

[Deleted User][Deleted User] ✭
in System
Posted by jmaddox
What IP is used as the source for health monitors? Are there instances where SNAT addresses are used?
Examples:
1. interface or ve address but no snat involved, servers on same subnet as interface or ve address
2. same as #1 but servers a layer 3 hop away
3. Items #1 and #2, but with SNAT addresses configured
4. multinet (2 different ips on same interface sharing a vlan). servers are a layer 3 hop away. which address is used as source?

 

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    [Deleted User][Deleted User] ✭
    edited February 2014
    Posted by ddesmidt

    If the AX has an IP address on one of its interfaces ("e" or "ve") in the same subnet as the server, then the AX will use that IP@.

    If the AX has NO IP address on one of its interfaces ("e" or "ve") in the same subnet as the server, then the AX will look at the next-hop to reach that server and use its IP@ in the next-hop subnet.

    For instance:
    AX configuration
    • ve1= 60.60.60.1
    • ve2= 10.0.1.1
    • ve3= 10.0.2.1
    • route to 10.0.3.0/24 via 10.0.1.2
    • SNAT= whatever
    • VIP= whatever
    Healthcheck on server
    • S1= 10.0.1.100 => AX uses the IP@10.0.1.1
    • S2= 10.0.2.100 => AX uses the IP@10.0.2.1
    • S3= 10.0.3.100 => AX uses the IP@10.0.1.1
    Dimitri
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    cwoodfieldcwoodfield Member ✭
    edited February 2014
    Is it possible to configure the source IP that is used for a monitor? I have a situation where I'd like the source IP to not be link-local to the server I'm monitoring - we have policy routing in place that's needed to properly route return traffic to the A10, but if the source is link-local the policy route doesn't get invoked.
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