topic RE: SLB EXOS in ExtremeSwitching (EXOS/Switch Engine)

SLB EXOS

Luis_Mendes — Wed, 03 Aug 2016 22:10:00 GMT

How its possible create a SLB (ldap) with EXOS(X8) like LSNAT on Enterasys ??

RE: SLB EXOS

Henrique — Wed, 03 Aug 2016 22:27:00 GMT

Hi Luis, currently this feature is only supported on EOS for specific HW.

I don't see any roadmap for that in EXOS.

RE: SLB EXOS

Luis_Mendes — Wed, 03 Aug 2016 22:27:00 GMT

have other ways, like script for this?

RE: SLB EXOS

Henrique — Wed, 03 Aug 2016 22:27:00 GMT

Could you please describe what would you like to accomplish?

RE: SLB EXOS

Luis_Mendes — Wed, 03 Aug 2016 22:27:00 GMT

The service is ldap..tcp/389 . the customer have many servers with this service...

RE: SLB EXOS

OscarK — Thu, 04 Aug 2016 11:42:00 GMT

If you could change the SLB config on the servers to an NLB (Network Load Balancing) if using microsoft we could use an NLB kind of solution.

RE: SLB EXOS

Stephane_Grosj1 — Thu, 04 Aug 2016 14:49:00 GMT

Depending on your topology, you can have a look at the Health Check Link Aggregation feature (p.271 of 16.1 User Guide). I never really used it, but that might help you.

Another approach could be via ACL. You can create a "sort of" SLB if the servers' IP can be masked correctly. Here's an example of such ACL (you would have several rules like that):

entry r11 {
if {
source-address 0.0.0.0 mask 0.0.0.7;
} then {
redirect-port-list 1:1;
}
}

entry r12 {
if {
source-address 0.0.0.1 mask 0.0.0.7;
} then {
redirect-port-list 1:2;
}
}

RE: SLB EXOS

Luis_Mendes — Thu, 04 Aug 2016 14:49:00 GMT

On this acl the problem is if the server down...

RE: SLB EXOS

Stephane_Grosj1 — Thu, 04 Aug 2016 14:49:00 GMT

yes, that needs to be handled.
Another way to do it is to use a script/app with UPM that would check the availability of the servers on a regular basis and apply dynamic ACLs accordingly.

RE: SLB EXOS

Jeremy_Gibbs — Thu, 04 Aug 2016 14:49:00 GMT

Example?

RE: SLB EXOS

Jeremy_Gibbs — Thu, 04 Aug 2016 14:49:00 GMT

Or a write up would be great. The more gtac knowledge articles the better!

RE: SLB EXOS

Luis_Mendes — Thu, 04 Aug 2016 14:49:00 GMT

But with LSNAT i need only 1 IP, and all devices have the ip with authenticator, then the switch redirectly to devices according with algorithm chosen...

RE: SLB EXOS

Luis_Mendes — Thu, 04 Aug 2016 14:49:00 GMT

there any example???

RE: SLB EXOS

OscarK — Thu, 04 Aug 2016 14:49:00 GMT

https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-Extreme-switches-to-handl...