CSS 11500 SMTP server load balancing

[r.docuyanan]

Hi,

Anyone can help me in some configuration guide or links or whitepaper on Content Switch server load balancing for SMTP servers, most of the examples are for WebServer.

Had anyone done lb for incoming tcp 25 connections to VIP to rounrobin bet two SMTP servers with client source ip persistence?

[arvenugopal]

Hi,

initially to start with the cisco documentaton gives excellent info.

http://www.cisco.com/en/US/partner/products/hw/contnetw/ps792/products_installation_and_configuration_guides_list.html

[adamtdixon]

I have SMTP setup with the below basic configuration, This works, however I would like the mail messages after being recieved by the client to be sent to remote servers by their own real ipaddresses, so that the VIP is not a single IP address that may get blacklisted easily. I have about 4 smtp servers. I also need the real client IP addresses to show up in logs.

I have 2x11503's each with 2sfps each uplinking to its own 2960.

Any help?

(ips changed about; requests come in on 192.168.1.230, 10.10.10.x is the mailserver real ip network)

They have the a gateway of 10.10.10.155

configure

!*************************** GLOBAL ***************************

ip route 0.0.0.0 0.0.0.0 192.168.1.238 1

!************************* INTERFACE *************************

interface 1/1

trunk

vlan 25

interface 1/2

trunk

vlan 21

!************************** CIRCUIT **************************

circuit VLAN21

ip address 10.10.10.151 255.255.255.224

ip virtual-router 5 priority 101 preempt

ip redundant-interface 5 10.10.10.155

circuit VLAN25

ip address 192.168.1.228 255.255.255.240

ip virtual-router 1 priority 101 preempt

ip redundant-vip 1 192.168.1.230 shared

!************************** SERVICE **************************

service mail25_1

ip address 10.10.10.131

active

service mail25_2

ip address 10.10.10.132

active

!*************************** OWNER ***************************

owner http_owner

content mail_1

add service mail25_1

add service mail25_2

vip address 192.168.1.230

balance weightedrr

protocol tcp

port 25

active

!*************************** GROUP ***************************

group mail_group

vip address 192.168.1.230

add service mail25_1

add service mail25_2

active

[adamtdixon]

Ignore previous, my group was left from another test configuration.... suspending that made it work immediatly.