Health monitor Source IP addresses
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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?
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?
0
Comments
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