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CSS Load balancing for Exchange Server

wasiimcisco
Level 1
Level 1

Hi,

I have CSS configured in single arm and I have multiple servers configured for load balancing and it is working fine but when I am configuring Exchange server for load balancing I am facing problem and applications and printer/scanners are not able to send the email through the Virtual IP address configured for exchaneg server.

But if we configured the real server IP in the printer/scanners they are able to send the email. While checking the logs on the exchange server, it is showing that request for the email so coming from the Exchange VIP configured in the CSS.

I can telnet on port 25 on the VIP address (192.168.200.237). But unable to send the email through this VIP.

Below is the configuration

service ENOC_EXCHANGE-1

  ip address 192.168.200.235

  active

        

service ENOC_EXCHANGE-2

  ip address 192.168.200.236

  active

content EXCHANGE

    add service ENOC_EXCHANGE-2

    add service ENOC_EXCHANGE-1

    vip address 192.168.200.237

    active

group EXCHANGE

  add destination service ENOC_EXCHANGE-1

  add destination service ENOC_EXCHANGE-2

  vip address 192.168.200.237

  active

DC-CSS01# show rule GIT EXCHANGE

Name:                EXCHANGE   Owner:                ENOC_GIT
State:                 Active   Type:                     HTTP
Balance:          Round Robin   Failover:                  N/A
Persistence:          Enabled   Param-Bypass:         Disabled
Session Redundancy:  Disabled
IP Redundancy:    Not Redundant
L3:         192.168.200.237
L4:         Any/Any
Url:       
Redirect: ""
TCP RST client if service unreachable: Disabled
Rule Services & Weights:
1: EXCHANGE-1-Alive, S-1
2: EXCHANGE-2-Down, S-1

=============================================================================

Please let me know how to solve this problem. System team is saying with the physical IP address it is working fine problem with Load balancing. I have even tried with the

Add service command in the group but didnt work for me. If i will remove the group command then I cant telnet on port 25.

I think this is related to single arm modle or some wrong configuration for the NAT.

Kindly assist me

4 Replies 4

Cesar Roque
Level 4
Level 4

Hi,

What is the default gateway of the printers/scanners?  When the printer/scanner opens the connection what path it follows?

We would need simultaneous traces on both sides of the CSS when the printer make the request to know what is happening.

--------------------- Cesar R ANS Team

wasiimcisco
Level 1
Level 1

Hi

Printers are on Vlan 80 ( gw is 192.168.80.1) and exange server is on vlan 200 (gw is 192.168.200.1) i have multiple vlan which will communcate with exchange.

I hv other servers on 200 subnet which are working fine in load balancing.

My CSS is single arm setup.

Please assist

Sent from Cisco Technical Support iPhone App

Hi,

Could you please send me the showtech of the CSS or the running configuration

Cesar

--------------------- Cesar R ANS Team

Hi,

Please find attached.

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