Ucarp - Flapping

Hello Everyone!

I am already configured ucarp with 2 Virtual Machine on separate HOST (vmware vshere 5.1). Everything works fine! Today network admin talked about flapping between the two vm’s which i am configured ucarp. When i open logs for both vm, it show me a lot of warnoing as bellow:

ucarp[473]: [WARNING] Bad digest – md2=[f9dc12f8…] md=[09c565cf…] – Check vhid, password and virtual IP address

OS: Oracle Linux 6.6

My configuration as bellow:

Server 1

/etc/ucarp/vip-001.conf

ID=”001″

BIND_INTERFACE=”eth0″

SOURCE_ADDRESS=”x.x.x.y”

VIP_ADDRESS=”x.x.x.z”

PASSWORD=”mypass”

OPTIONS=”–shutdown –preempt –advskew=10″


Server 2

/etc/ucarp/vip-001.conf

ID=”001″

BIND_INTERFACE=”eth0″

SOURCE_ADDRESS=”x.x.x.a”

VIP_ADDRESS=”x.x.x.z”

PASSWORD=”mypass”


/usr/libexec/ucarp/vip-up

#!/bin/sh

exec 2>/dev/null

/sbin/ifconfig eth0:0 x.x.x.z/24 up


/usr/libexec/ucarp/vip-down

#!/bin/sh

exec 2>/dev/null

/sbin/ifconfig eth0:0 down


I am already enabled promiscuous mode on both hosts network (vmware)

Where is my issue?

Hello,

Start ntpd service on both HA servers in order for them to synchronise.


chkconfig ntpd on
service ntpd restart

Regards