Large Number of IPChange Notifications When Guest Has NIC Aliases

(Doc ID 2341325.1)

Last updated on DECEMBER 20, 2017

Applies to:

Oracle VM - Version 3.4.2 and later
Linux x86-64

Symptoms

When aliases are defined in a Guest VM for a NIC, the ovmd continuously reports changed IP address to the Oracle VM Manager.

ovs-agent.log shows below log:

[2017-11-09 06:04:15 14846] DEBUG (notificationserver:225) sent events:[('{DOMAIN} 0004fb00-0006-0000-9879-6166e4c224f5 {VMAPI} VMAPIEvent
{"VMAPIEvent":{"severity":5,"subsystem":"ovmdSS","process":"ovmd","type":"system","payload":{"type":"IPChange","IPChange":{"intrface":"eth1","mac":
"0021f6afc724","ipv4info":{"ipinfo":[{"address":"xxx.xxx.17.31","netmask":"255.255.255.0","gateway":"xxx.xxx.17.1","mtu":1500,"speed"
:1000000000}]},"ipv6info":{"ipinfo":[{"address":"","netmask":"","gateway":"xxx.xx.17.1","mtu":1500,"speed":1000000000}]}}}}}', {}), ('{DOMAIN}
0004fb00-0006-0000-9879-6166e4c224f5 {VMAPI} VMAPIEvent {"VMAPIEvent":{"severity":5,"subsystem":"ovmdSS","process":"ovmd","type":"system","paylo
ad":{"type":"IPChange","IPChange":{"intrface":"eth1","mac":"0021f6afc724","ipv4info":{"ipinfo":[{"address":"xxx.xxx.17.31","netmask"
:"255.255.255.0","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]},"ipv6info":{"ipinfo":[{"address":"","netmask":"","gateway":"xxx.xxx.17.1","mtu":150
0,"speed":1000000000}]}}}}}', {}), ('{DOMAIN} 0004fb00-0006-0000-9879-6166e4c224f5 {VMAPI} VMAPIEvent
{"VMAPIEvent":{"severity":5,"subsystem":"ovmdSS","process":"ovmd","type":"system","payload":{"type":"IPChange","IPChange":{"intrface":"eth3","mac":"0021f6533a60
","ipv4info":{"ipinfo":[{"address":"xxx.xxx.17.31","netmask":"255.255.255.0","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]},"ipv6info":{"ipinfo":[{
"address":"","netmask":"","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]}}}}}', {})]

 

$ cat /var/log/ovmwatch.log | grep -i 'ipch' | grep eth0 | more

AGENT_NOTIFY EVENT : Nov 8 11:18:53 {DOMAIN}
0004fb00-0006-0000-9879-6166e4c224f5 {VMAPI} VMAPIEvent{"VMAPIEvent":{"severity":5,"subsystem":"ovmdSS","process":"ovmd","type":"system","payload":{"type":"IPChan
ge","IPChange":{"intrface":"eth0","mac":"0021f654d8f1","ipv4info":{"ipinfo":[{"address":"xxx.xxx.17.29","netmask":"255.255.255.0","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]},"ipv6info":{"ipinfo":[{
"address":"","netmask":"","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]}}}}}

AGENT_NOTIFY EVENT : Nov 8 11:18:53 {DOMAIN}
0004fb00-0006-0000-9879-6166e4c224f5 {VMAPI} VMAPIEvent
{"VMAPIEvent":{"severity":5,"subsystem":"ovmdSS","process":"ovmd","type":"system","payload":{"type":"IPChan
ge","IPChange":{"intrface":"eth0","mac":"0021f654d8f1","ipv4info":{"ipinfo":[{
"address":"xxx.xxx.17.125","netmask":"255.0.0.0","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]},"ipv6info":{"ipinfo":[{"ad
dress":"","netmask":"","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]}}}}}

AGENT_NOTIFY EVENT : Nov 8 11:18:53 {DOMAIN}
0004fb00-0006-0000-9879-6166e4c224f5 {VMAPI} VMAPIEvent
{"VMAPIEvent":{"severity":5,"subsystem":"ovmdSS","process":"ovmd","type":"system","payload":{"type":"IPChan
ge","IPChange":{"intrface":"eth0","mac":"0021f654d8f1","ipv4info":{"ipinfo":[{
"address":"xxx.xxx.17.125","netmask":"255.255.255.0","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]},"ipv6info":{"ipinfo":[
{"address":"","netmask":"","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]}}}}}

AGENT_NOTIFY EVENT : Nov 8 11:19:03 {DOMAIN}
0004fb00-0006-0000-9879-6166e4c224f5 {VMAPI} VMAPIEvent
{"VMAPIEvent":{"severity":5,"subsystem":"ovmdSS","process":"ovmd","type":"system","payload":{"type":"IPChan
ge","IPChange":{"intrface":"eth0","mac":"0021f654d8f1","ipv4info":{"ipinfo":[{
"address":"xxx.xxx.17.29","netmask":"255.255.255.0","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]},"ipv6info":{"ipinfo":[{
"address":"","netmask":"","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]}}}}}

AGENT_NOTIFY EVENT : Nov 8 11:19:03 {DOMAIN}
0004fb00-0006-0000-9879-6166e4c224f5 {VMAPI} VMAPIEvent
{"VMAPIEvent":{"severity":5,"subsystem":"ovmdSS","process":"ovmd","type":"system","payload":{"type":"IPChan
ge","IPChange":{"intrface":"eth0","mac":"0021f654d8f1","ipv4info":{"ipinfo":[{
"address":"xxx.xxx.17.29","netmask":"255.255.255.0","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]},"ipv6info":{"ipinfo":[{
"address":"","netmask":"","gateway":"xxx.xxx.17.1","mtu":1500,"speed":1000000000}]}}}}}

 

 

$ ip address

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 5000
link/ether 00:21:f6:54:d8:f1 brd ff:ff:ff:ff:ff:ff
inet xxx.xxx.17.31/24 brd y.y.y.y scope global eth0 <<<<<<<<<<<<<<<<<<<<<<<<<<<
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen5000
link/ether 00:21:f6:af:c7:24 brd ff:ff:ff:ff:ff:ff
inet xxx.xxx.17.31/24 brd x.x.x.x scope global eth1 <<<<<<<<<<<<<<<<<<<<<<<<<<<
valid_lft forever preferred_lft forever
inet xxx.xxx.17.125/24 brd x.x.x.x scope global secondary eth1 <<<<<<<<<<<<<<<<<<<<<<<<<<<
valid_lft forever preferred_lft forever
inet xxx.xxx.17.32/24 brd x.x.x.x scope global secondary eth1 <<<<<<<<<<<<<<<<<<<<<<<<<<<
valid_lft forever preferred_lft forever

 

 


STEPS
-----------------------
The issue can be reproduced at will with the following steps:
On Oracle VM
1. add multiple aliases to a nic in a Guest VM
2. ovmd is active in the Guest VM




Changes

 

Cause

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