Linux Bonding Network

基本設定

RedHat 7/8 with nmtui

nmtui > Edit a connection > Add > New Connection > Select Bond > Create

Profile Name: bond0
Device: bond0

> Slaves > Add

Profile Name: eno1-slave NOTE: 建議這裡要加上 -slave，與實際的裝置名稱做區別
Device: eno1
Profile Name: ens3f0-slave
Device: ens3f3

> IPv4 Configuration

Address: 10.4.1.71/24
Gateway: 10.4.1.254
DNS Servers: 10.3.3.3

> IPv6 Configuration > Disabled

Profile Name 的名稱會與實際設定檔名 ifcfg-XXX 有關，上述的設定會產生設定檔 ifcfg-bond0 , ifcfg-eno1-slave

如果 Profile Name 設定錯了要修改，必須移除整個 Bond 設定，然後再重建；如果直接修改設定，關聯的設定檔名稱 ifcfg-XXX 並不會一起被更新，這會造成爾後管理上的困擾。

變更 Bonding 模式
預設模式是使用 Load Balancing (Round-Robin)，將它變更為 Acitve-Backup

nmtui > Edit a connection > Bond: bond0 > Edit >

Mode: Active Backup
Primary: eno1 註:需要指定其中一張網卡為主要

NOTE: 如果要使用預設的 Round-Robin 模式，網卡所連結的 Switch 設備必須設定 EtherChannel，否則 Switch 設備會偵測到 vlan XX is flapping between port YYY and port ZZZ。

重啟網路服務

# 注意:如果有使用 iSCSI Disks,重啟網路服務可能造成系統其他問題
systemctl restart network.service
or
nmcli networking off; modprobe -r bonding ; nmcli networking on

LACP Mode

RedHat 7/8

nmtui > Edit a connection > Bond: bond0 > Edit >

Mode: 802.3ad

Verify the state of the network

Make sure the Aggregator ID are the same on the ports with the same Port Channel configured.
Bonding Mode is 802.3ad.

If you run into the issue with Multiple LACP bonds have the same Aggregator ID, check the link, https://access.redhat.com/solutions/2916431 .

[root@tpeitptsm01 ~]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2 (0)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Peer Notification Delay (ms): 0

802.3ad info
LACP rate: slow
Min links: 0
Aggregator selection policy (ad_select): stable
System priority: 65535
System MAC address: b4:7a:f1:4c:8b:1c
Active Aggregator Info:
        Aggregator ID: 1
        Number of ports: 4
        Actor Key: 9
        Partner Key: 3
        Partner Mac Address: 70:18:a7:dc:ac:80

Slave Interface: eno1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: b4:7a:f1:4c:8b:1c
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: none
Partner Churn State: none
Actor Churned Count: 0
Partner Churned Count: 0
details actor lacp pdu:
    system priority: 65535
    system mac address: b4:7a:f1:4c:8b:1c
    port key: 9
    port priority: 255
    port number: 1
    port state: 61
details partner lacp pdu:
    system priority: 32768
    system mac address: 70:18:a7:dc:ac:80
    oper key: 3
    port priority: 32768
    port number: 263
    port state: 61

Slave Interface: eno2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: b4:7a:f1:4c:8b:1d
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: none
Partner Churn State: none
Actor Churned Count: 0
Partner Churned Count: 0
details actor lacp pdu:
    system priority: 65535
    system mac address: b4:7a:f1:4c:8b:1c
    port key: 9
    port priority: 255
    port number: 2
    port state: 61
details partner lacp pdu:
    system priority: 32768
    system mac address: 70:18:a7:dc:ac:80
    oper key: 3
    port priority: 32768
    port number: 264
    port state: 61

Configuration on the switch

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