ifenslave mode 설정하기

ifenslave를 통한 channel bonding은
modprobe 시에 mode=0 과 같은 옵션을 주어 수행한다는데..
일단 기본값으로는 0번(round robin)이 되어 있고 다음과 같이 숫자를 주어 다른 모드로 시작할 수 있다.

# modprobe bonding mode=6  # cat /proc/net/bonding/bond0  Ethernet Channel Bonding Driver: v3.5.0 (November 4, 2008) Bonding Mode: adaptive load balancing Primary Slave: None Currently Active Slave: eth0 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: eth1 MII Status: up Link Failure Count: 1 Permanent HW addr: 00:00:00:00:00:00 Slave Interface: eth0 MII Status: up Link Failure Count: 0 Permanent HW addr: 00:00:00:00:00:00

만약 작동중에 mode를 변경하고 싶다면
다음과 같이 /sys/class/net/bond0/bonding/mode 파일에 원하는 mode 값을 넣어주면 된다. 

To configure bond0 for balance-alb mode: # ifconfig bond0 down # echo 6 > /sys/class/net/bond0/bonding/mode  - or - # echo balance-alb > /sys/class/net/bond0/bonding/mode NOTE: The bond interface must be down before the mode can be changed. [링크 : http://www.kernel.org/doc/Documentation/networking/bonding.txt]

# modinfo bonding filename:       /lib/modules/2.6.32-36-generic/kernel/drivers/net/bonding/bonding.ko author:         Thomas Davis, tadavis@lbl.gov and many others description:    Ethernet Channel Bonding Driver, v3.5.0 version:        3.5.0 license:        GPL srcversion:     C0EFCD8CB4AC214A8146EC2 depends:         vermagic:       2.6.32-36-generic SMP mod_unload modversions 586  parm:           max_bonds:Max number of bonded devices (int) parm:           num_grat_arp:Number of gratuitous ARP packets to send on failover event (int) parm:           num_unsol_na:Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event (int) parm:           miimon:Link check interval in milliseconds (int) parm:           updelay:Delay before considering link up, in milliseconds (int) parm:           downdelay:Delay before considering link down, in milliseconds (int) parm:           use_carrier:Use netif_carrier_ok (vs MII ioctls) in miimon; 0 for off, 1 for on (default) (int) parm:           mode:Mode of operation : 0 for balance-rr, 1 for active-backup, 2 for balance-xor, 3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, 6 for balance-alb (charp) parm:           primary:Primary network device to use (charp) parm:           lacp_rate:LACPDU tx rate to request from 802.3ad partner (slow/fast) (charp) parm:           ad_select:803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2) (charp) parm:           xmit_hash_policy:XOR hashing method: 0 for layer 2 (default), 1 for layer 3+4 (charp) parm:           arp_interval:arp interval in milliseconds (int) parm:           arp_ip_target:arp targets in n.n.n.n form (array of charp) parm:           arp_validate:validate src/dst of ARP probes: none (default), active, backup or all (charp) parm:           fail_over_mac:For active-backup, do not set all slaves to the same MAC.  none (default), active or follow (charp)

mode:Mode of operation : 
0 for balance-rr, 
1 for active-backup, 
2 for balance-xor, 
3 for broadcast, 
4 for 802.3ad, 
5 for balance-tlb, 
6 for balance-alb

[링크 : http://www.linuxhorizon.ro/bonding.html]

4) Module parameters. --------------------- The following module parameters can be passed:     mode= Possible values are 0 (round robin policy, default) and 1 (active backup policy), and 2 (XOR).  See question 9 and the HA section for additional info.     miimon= Use integer value for the frequency (in ms) of MII link monitoring. Zero value is default and means the link monitoring will be disabled. A good value is 100 if you wish to use link monitoring. See HA section for additional info.     downdelay= Use integer value for delaying disabling a link by this number (in ms) after the link failure has been detected. Must be a multiple of miimon. Default value is zero. See HA section for additional info.     updelay= Use integer value for delaying enabling a link by this number (in ms) after the "link up" status has been detected. Must be a multiple of miimon. Default value is zero. See HA section for additional info.     arp_interval= Use integer value for the frequency (in ms) of arp monitoring.  Zero value  is default and means the arp monitoring will be disabled.  See HA section for additional info.   This field is value in active_backup mode only.     arp_ip_target= An ip address to use when arp_interval is > 0.  This is the target of the arp request sent to determine the health of the link to the target.   Specify this value in ddd.ddd.ddd.ddd format.   [링크 : http://www.kernel.org/pub/linux/kernel/people/marcelo/linux-2.4/Documentation/networking/bonding.txt ]