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Exadata: Active-Passive Bond Intermittently Fails after Network Device Failback (Doc ID 2446202.1)

Last updated on JULY 04, 2019

Applies to:

Linux OS - Version Oracle Linux 6.9 with Unbreakable Enterprise Kernel [4.1.12] and later
Exadata Cloud at Customer X7-2 Hardware - Version All Versions to All Versions [Release All Releases]
Oracle Exadata Hardware - Version 11.2.3.1.1 to 11.2.3.1.1 [Release 11.2]
Information in this document applies to any platform.

Symptoms

 On Exadata environment , the network packets are 100% dropped when the second device fail back to the bond which is configured as Active/Passive ( mode=1).

Changes

Configuration ::

Oracle Linux Server release 6.9 with kernel version 4.1.12-94.7.8.el6uek.x86_64
Product Name: ORACLE SERVER X7-2

18:00.0 Ethernet controller: Broadcom Limited BCM57417 NetXtreme-E 10Gb/25Gb RDMA Ethernet Controller (rev 01)
18:00.1 Ethernet controller: Broadcom Limited BCM57417 NetXtreme-E 10Gb/25Gb RDMA Ethernet Controller (rev 01)
5e:00.0 Ethernet controller: Broadcom Limited BCM57414 NetXtreme-E 10Gb/25Gb RDMA Ethernet Controller (rev 01)
5e:00.1 Ethernet controller: Broadcom Limited BCM57414 NetXtreme-E 10Gb/25Gb RDMA Ethernet Controller (rev 01)

>> proc/net/bonding/bondeth0
    Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

    Bonding Mode: fault-tolerance (active-backup)
    Primary Slave: None
    Currently Active Slave: eth1
    MII Status: up
    MII Polling Interval (ms): 100
    Up Delay (ms): 5000
    Down Delay (ms): 2000

    Slave Interface: eth1
    MII Status: up
    Speed: 10000 Mbps
    Duplex: full
    Link Failure Count: 0
    Permanent HW addr: <MAC_ADDR>
    Slave queue ID: 0

    Slave Interface: eth2
    MII Status: up
    Speed: 10000 Mbps
    Duplex: full
    Link Failure Count: 0
    Permanent HW addr: <MAC_ADDR>
    Slave queue ID: 0

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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