CT900 blade Eth5 Is Flapping running RedHat Linux 6.1

Asset ID:	1-71-2054101.1
Update Date:	2017-09-25
Keywords:

Solution Type Technical Instruction Sure

Solution 2054101.1 : CT900 blade Eth5 Is Flapping running RedHat Linux 6.1

Applies to:

Sun Netra CT900 Server - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Goal

On a CT900 blade running RH Linux 6.1 Ethernet interface eth5 is flapping (link going up/down repeatedly)

Mar 20 08:50:46 host01 kernel: niu: eth5: Link is down
Mar 20 08:50:46 host01 kernel: bonding: bond0: link status definitely down for interface eth5, disabling it
Mar 20 08:50:47 host01 kernel: niu: eth5: Link is up at 10Gb/sec, full duplex
Mar 20 08:50:47 host01 kernel: bond0: link status definitely up for interface eth5, 10000 Mbps full duplex.
Mar 20 08:51:02 host01 kernel: device eth5 entered promiscuous mode
Mar 20 08:51:08 host01 kernel: device eth5 left promiscuous mode
Mar 20 08:54:00 host01 kernel: bonding: bond0: link status definitely down for interface eth5, disabling it

Ifconfig output shows:

# ifconfig eth5
eth5   Link encap:Ethernet HWaddr 00:21:28:3C:D6:12
       BROADCAST SLAVE MULTICAST MTU:1500 Metric:1
       RX packets:610471 errors:24031 dropped:0 overruns:0 frame:0
       TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
       collisions:0 txqueuelen:1000
       RX bytes:71937152 INC05BT8

Solution

To address this issue the following was added to the /etc/sysconfig/network-scripts/ifcfg-eth5 file:

BONDING_OPTS="mode=1 miimon=200 fail_over_mac=1"

References

<NOTE:761868.1> - Oracle Exadata Diagnostic Information required for Disk Failures and some other Hardware issues
<NOTE:1437249.1> - CT900 Troubleshooting & Data Collection Cheat Sheet
<NOTE:1019438.1> - How to gather data from a Sun Netra[TM] CT900 system.
<NOTE:1930475.1> - How to Replace a Sun Netra Computing Blade (CP3020/3220/3250/3270) in Netra CT900 chassis
<NOTE:1471371.1> - How to Replace a switch blade for Netra CT900 chassis:ATR:1471371.1:0
<BUG:20877150> - CP3240 SWITCH FLAPPING PORT ISSUES WITH CP3270 BLADES
<NOTE:1547088.2> - How to Upload Files to Oracle Support
<NOTE:1387761.1> - How to replace Netra CP3140/CP3240 switch blade for Netra CT900 platform/chassis

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