topic Re: can two server farm share the same VIP? in Application Networking

can two server farm share the same VIP?

Alvaro Perez Unzueta — Sat, 12 Dec 2009 18:15:14 GMT

Hello,

Can i create two server farm and share the same VIP? for example:

is posible this configuration?

rserver host des1
ip address 10.24.18.34
inservice
rserver host des2
ip address 10.24.18.35
inservice
rserver host was1
ip address 10.24.18.10
inservice
rserver host was2
ip address 10.24.18.11
inservice

serverfarm host farm1
rserver des1
    inservice
rserver des2
    inservice
serverfarm host farm2
rserver was1
    inservice
rserver was2
    inservice

class-map type http loadbalance match-all Check-Headers-10
2 match http url .*
3 match http header Host header-value "10.24.16.*"
4 match http header User-Agent header-value ".*MSIE.*"

class-map type http loadbalance match-all Check-Headers-s-10
2 match http url .*
3 match http header Host header-value "10.24.16.*"
4 match http header User-Agent header-value ".*MSIE.*"

class-map type http loadbalance match-all other-http-10
2 match http url .*
class-map type http loadbalance match-all other-http-s-10
2 match http url .*

class-map match-all server-vlan-vip-10-http
2 match virtual-address 10.24.16.10 tcp eq www

class-map match-all server-vlan-vip-10-https
2 match virtual-address 10.24.16.10 tcp eq https

policy-map type loadbalance first-match http-10-lb
class Check-Headers-10
serverfarm farm2
class other-http-10
serverfarm farm2

policy-map type loadbalance first-match http-10-s-lb
class Check-Headers-s-10
serverfarm farm1
class other-http-s-10
serverfarm farm1

policy-map type loadbalance first-match lb-logic-10
class class-default
serverfarm farm2

policy-map type loadbalance first-match lb-logic-s-10
class class-default
serverfarm farm1

policy-map multi-match server-vip-service-policy-10
class server-vlan-vip-10-http
    loadbalance vip inservice
    loadbalance policy http-10-lb
    loadbalance policy http-10-s-lb
    loadbalance vip icmp-reply
class server-vlan-vip-10-https
    loadbalance vip inservice
    loadbalance policy lb-logic-10
    loadbalance policy lb-logic-s-10
    loadbalance vip icmp-reply

interface vlan 233
description Servidores_Balanceados_outside
peer ip address 10.24.16.7 255.255.255.0
access-group input anyone
access-group output anyone
service-policy input client-vips
no shutdown
interface vlan 242
description Servidores_desarrollo1
peer ip address 10.24.18.33 255.255.255.240
access-group input anyone
access-group output anyone
service-policy input server-vip-service-policy-10
no shutdown

Re: can two server farm share the same VIP?

Gilles Dufour — Mon, 14 Dec 2009 14:48:16 GMT

This is not possible.

You can only have 1 policy.

What are you trying to achieve with this ?

If you want to loadbalance to all rservers, why don't you merge them into a single serverfarm ?

Gilles.

Re: can two server farm share the same VIP?

Alvaro Perez Unzueta — Mon, 14 Dec 2009 16:23:05 GMT

Hello gdufour,

Actually i've got this configuration:

1.) One serverfarm (farm1).

2.) In this serverfarm, i have two real servers des1 and des2.

3.) The real servers are using VIP 10.24.16.10.

4.) The loadbalance is roundrobin using http with headers.

I want to have:

1.) One new server (a.b.c.d), it can be in the same subnett.

2.) This server don't know if can belong to serverfarm farm1.

2.) When i reach to http://index/url/url1, this has to be to VIP 10.24.16.10.

3.) When i reach the link, the VIP 10.24.16.10 redirect to server a.b.c.d.

4.) When the server a.b.c.d down, the serverfarm farm1 have to take the load of the url.

Is posible this configuration?

Thank you.

Best Regards

Re: can two server farm share the same VIP?

Gilles Dufour — Mon, 14 Dec 2009 17:17:32 GMT

What you need to use is backup serverfarm.

ie:

switch/Admin(config)# policy-map type loadbalance first-match vmware-80
switch/Admin(config-pmap-lb)# class class-default
switch/Admin(config-pmap-lb-c)# serverfarm vmware-http backup 10.10.10.10

So, if all servers in my vmware-http farm are down, traffic will be sent to serverfarm 10.10.10.10.

Gilles.

Re: can two server farm share the same VIP?

Alvaro Perez Unzueta — Mon, 14 Dec 2009 18:08:36 GMT

Hello,

This feature work in the ACE Module??, because i have ACE Module.

ACE4700

https://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/ace_appliances/vA1_7_/command/reference/servfarm.html#wp1010747

ACE MODULE

https://www.cisco.com/en/US/docs/interfaces_modules/services_modules/ace/v3.00_A1/command/reference/realserv.html

have you any example or configuration??

Thank you

Best Regards

Álvaro