Duplicated VIP address instroduced in the system may cause an ARP storm on Solaris 11 (Doc ID 2215247.1)

Last updated on DECEMBER 18, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 and later
Oracle Solaris on x86-64 (64-bit)
Oracle Solaris on SPARC (64-bit)

Symptoms

1. Clusterware may introduce a duplicated VIP or SCAN VIP on another node in the cluster. Note that the SCAN and Node VIPs can run on any node, but must not be plumbed on more than one machine at a time.

2. On Solaris, when a duplicated IP is introduced on the system the OS log may report messages like:

<node> ip: [ID 759807 kern.warning] WARNING: <interface>:3 has duplicate address <ip> (in use by <mac address>); disabled

note that the interface was left disabled, but ipadm or ifconfig may show the duplicated IP address:

# ipadm show-addr
ADDROBJ TYPE STATE ADDR
..
net0/v4b static duplicate <ip address>/21 <<<<<<<<<< It shows duplicate
..

3. On Solaris, the system may try to recover (enable) the interface and may produce an ARP strom. The nodes may report:

<node 1> ip: [ID 636139 kern.notice] NOTICE: recovered address ::ffff:<ip address> on pub0:3 (somehow got propagated to pub0 of both nodes.
<node 1> ip: [ID 195243 kern.warning] WARNING: proxy ARP problem? Node '<mac address>' is using <ip address> on pub0
<node 1> last message repeated 20495 times

<node 2> ip: [ID 195243 kern.warning] WARNING: proxy ARP problem? Node '<mac address>' is using <ip address> on pub0
<node 2> twsmwmapsdp03 last message repeated 1853064 times

Changes

No changes have been made to the system

Cause

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