ACE: How does one probe "rservers redirect" in "serverfarm redirect"?

Answered Question
Aug 30th, 2010

Probes can be used with serverfarms of type host

probe http WEB_SERVERS

interval 5

passdetect interval 10

passdetect count 2

request method get url /index.html   expect status 200 200

  !--- Probe used to detect the status  !--- of the servers in the serverfarm.

rserver host S1

ip address 192.168.0.200

inservice

rserver host S2

  ip address 192.168.0.201

  inservice

rserver host S3

  ip address 192.168.0.202

  inservice

rserver host S4

  ip address 192.168.0.203

  inservice

serverfarm host SF-1

  probe WEB_SERVERS

  rserver S1

   inservice

  rserver S2

   inservice

  rserver S3

   inservice

  rserver S4

   inservice

When it comes to "serverfarm redirect" how would one emulate the probing to work as above. (When one is loadbalancing servers of type redirect, the probe command is not available for serverfarm redirect SF-2)

Its also not possible to mix reservers of type redirect with serverfarm of host. If it was possible, This would have answered my question, which is.

How does one emulate the probe functionality found in rsever host and serverfarm host in serverfarm redirect?

I have this problem too.
0 votes
Correct Answer by yushimaz about 6 years 3 months ago

Probing a redirect server was supported on A2(3.2) or later.

So, you can use the probe configuration on 'serverfarm redirect', where 'ip address [ip_address] routed' option is required.

http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/ace/vA2_3_x/Release/Note/RACEA2_3_X.html#wp620109

Unfortunately, 'rserver host' and 'rserver redirect' cannot exist together in the same serverfarm since 'serverfarm host' is

for real server and 'serverfarm redirect' is for redirect rserver.

http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/ace/vA2_3_0/command/reference/config.html#wp1117844

When you use backup serverfarm as below, you can use both serverfarms. However, you cannot use primary serverfarm

and backup serverfarm at the same time.

policy-map type loadbalance first-match lb

  class class-default

    serverfarm SF1 backup SF2

Regards,

Yuji

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litrenta Tue, 08/31/2010 - 07:05

a redirect serverfarm would only have redirect servers in it. A redirect

server is not a real server but rather an internal structure in the ace with the specific

purpose of performing an http redirect based on an appropriate load balancing policy.

Since it is an internal structure it cannot be probed (it has no ip address ) it is always operational as long as it is inservice.

Regards

Correct Answer
yushimaz Tue, 08/31/2010 - 18:24

Probing a redirect server was supported on A2(3.2) or later.

So, you can use the probe configuration on 'serverfarm redirect', where 'ip address [ip_address] routed' option is required.

http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/ace/vA2_3_x/Release/Note/RACEA2_3_X.html#wp620109

Unfortunately, 'rserver host' and 'rserver redirect' cannot exist together in the same serverfarm since 'serverfarm host' is

for real server and 'serverfarm redirect' is for redirect rserver.

http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/ace/vA2_3_0/command/reference/config.html#wp1117844

When you use backup serverfarm as below, you can use both serverfarms. However, you cannot use primary serverfarm

and backup serverfarm at the same time.

policy-map type loadbalance first-match lb

  class class-default

    serverfarm SF1 backup SF2

Regards,

Yuji

edgarfc254 Fri, 09/03/2010 - 00:02

Was running A2(3.0) and I have upgraded to A2(3.2). Now probing of redirect servers is possible.

Thanks yushimaz

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