Red Hat Summit 红帽全球峰会支持控制台（Console）开发人员开始试用联系人

此内容没有您所选择的语言版本。

Appendix C. Open vSwitch Bonding Options

The Overcloud provides networking through Open vSwitch (OVS), which provides several options for bonded interfaces. In Section 7.2, “Creating a Network Environment File”, you can configure a bonded interface in the network environment file using the following parameter: 

  BondInterfaceOvsOptions:
    "bond_mode=balance-slb"
Copy to Clipboard Toggle word wrap

C.1. Choosing a Bond Mode
复制链接

By default, you cannot use LACP with OVS-based bonds. This configuration is not supported due to a known issue with some versions of Open vSwitch. Instead, consider using bond_mode=balance-slb as a replacement for this functionality. In addition, you can still use LACP with Linux bonding in your network interface templates. For example: 

      - type: linux_bond
        name: bond1
        members:
        - type: interface
          name: nic2
        - type: interface
          name: nic3
        bonding_options: "mode=802.3ad lacp_rate=[fast|slow] updelay=1000 miimon=100"
Copy to Clipboard Toggle word wrap
  • mode - enables LACP.
  • lacp_rate - defines whether LACP packets are sent every 1 second, or every 30 seconds.
  • updelay - defines the minimum amount of time that an interface must be active before it is used for traffic (this helps mitigate port flapping outages).
  • miimon - the interval in milliseconds that is used for monitoring the port state using the driver’s MIIMON functionality.

If you still want to use LACP with OVS-base bonds, you can manually delete the following lines from each network interface configuration (NIC) file before deployment: 

    constraints:
      - allowed_pattern: "^((?!balance.tcp).)*$"
        description: |
          The balance-tcp bond mode is known to cause packet loss and
          should not be used in BondInterfaceOvsOptions.
Copy to Clipboard Toggle word wrap

After you delete the constraint from each NIC file, you can set the bond mode option in the bond interface parameter: 

  BondInterfaceOvsOptions:
    "bond_mode=balance-tcp"
Copy to Clipboard Toggle word wrap

For the technical details behind this constraint, see BZ#1267291.

For more information on Linux bonding options, see 4.5.1. Bonding Module Directives in the Red Hat Enterprise Linux 7 Networking Guide.

C.2. Bonding Options
复制链接

The following table provides some explanation of these options and some alternatives depending on your hardware.

Expand
Table C.1. Bonding Options

bond_mode=balance-slb

Balances flows based on source MAC address and output VLAN, with periodic rebalancing as traffic patterns change. Bonding with balance-slb allows a limited form of load balancing without the remote switch’s knowledge or cooperation. SLB assigns each source MAC and VLAN pair to a link and transmits all packets from that MAC and VLAN through that link. This mode uses a simple hashing algorithm based on source MAC address and VLAN number, with periodic rebalancing as traffic patterns change. This mode is similar to mode 2 bonds used by the Linux bonding driver. This mode is used when the switch is configured with bonding but is not configured to use LACP (static instead of dynamic bonds).

bond_mode=active-backup

This mode offers active/standby failover where the standby NIC resumes network operations when the active connection fails. Only one MAC address is presented to the physical switch. This mode does not require any special switch support or configuration, and works when the links are connected to separate switches. This mode does not provide load balancing.

lacp=[active|passive|off]

Controls the Link Aggregation Control Protocol (LACP) behavior. Only certain switches support LACP. If your switch does not support LACP, use bond_mode=balance-slb or bond_mode=active-backup.

other-config:lacp-fallback-ab=true

Sets the LACP behavior to switch to bond_mode=active-backup as a fallback.

other_config:lacp-time=[fast|slow]

Set the LACP heartbeat to 1 second (fast) or 30 seconds (slow). The default is slow.

other_config:bond-detect-mode=[miimon|carrier]

Set the link detection to use miimon heartbeats (miimon) or monitor carrier (carrier). The default is carrier.

other_config:bond-miimon-interval=100

If using miimon, set the heartbeat interval in milliseconds.

bond_updelay=1000

Number of milliseconds a link must be up to be activated to prevent flapping.

other_config:bond-rebalance-interval=10000

Milliseconds between rebalancing flows between bond members. Set to zero to disable.

Important

If you experience packet drops or performance issues using Linux bonds with Provider networks, consider disabling Large Receive Offload (LRO) on the standby interfaces. Avoid adding a Linux bond to an OVS bond, as port-flapping and loss of connectivity can occur. This is a result of a packet-loop through the standby interface.

返回顶部
Red Hat logoGithubredditYoutubeTwitter

学习

尝试、购买和销售

社区

关于红帽文档

通过我们的产品和服务，以及可以信赖的内容，帮助红帽用户创新并实现他们的目标。 了解我们当前的更新.

让开源更具包容性

红帽致力于替换我们的代码、文档和 Web 属性中存在问题的语言。欲了解更多详情，请参阅红帽博客.

關於紅帽

我们提供强化的解决方案，使企业能够更轻松地跨平台和环境（从核心数据中心到网络边缘）工作。

Theme

© 2025 Red Hat