有没有办法让keepalived定期发送无偿ARP？

我们有以下情况：

>交换机故障(VLAN设置)

> keepalived failovered to backup instance

>备份实例发送免费ARP但思科ASA设备没有得到它(因为交换机故障)

>当交换机恢复时(几分钟后)VIP无法访问,因为ASA没有刷新ARP表(ARP表到期时间设置为4h)

>由于ASA已经从之前的活动节点获得了MAC,因此它没有发送ARP请求

>在我们重新启动keepalived实例启动新GARP之前,VIP无法访问

因此,我们认为我们可以通过定期GARP来避免这种情况.这是一个很好的方法,有没有办法在keepalived内做到这一点？

还有其他建议可以避免这种问题吗？

Keepalived配置：

global_defs {

notification_email {

email@address.com

}

notification_email_from SERVER_1

smtp_server smtp.server.local

smtp_connect_timeout 30

router_id SERVER_1

}

vrrp_instance V1 {

state BACKUP

nopreempt

interface eth0

lvs_sync_daemon_interface eth0

virtual_router_id 150

priority 120

advert_int 1

persistence_timeout 0

smtp_alert

authentication {

auth_type PASS

auth_pass xxx

}

virtual_ipaddress {

10.xxx.xxx.xxx

}

}

404_22@

keepalived版本1.2.20及更高版本支持以下关于免费ARP的配置设置,vrrp_garp_master_refresh是我需要的.

# delay for second set of gratuitous ARPs after transition to MASTER

vrrp_garp_master_delay 10 # seconds,default 5,0 for no second set

# number of gratuitous ARP messages to send at a time after transition to MASTER

vrrp_garp_master_repeat 1 # default 5

# delay for second set of gratuitous ARPs after lower priority advert received when MASTER

vrrp_garp_lower_prio_delay 10

# number of gratuitous ARP messages to send at a time after lower priority advert received when MASTER

vrrp_garp_lower_prio_repeat 1

# minimum time interval for refreshing gratuitous ARPs while MASTER

vrrp_garp_master_refresh 60 # secs,default 0 (no refreshing)

# number of gratuitous ARP messages to send at a time while MASTER

vrrp_garp_master_refresh_repeat 2 # default 1

# Delay in ms between gratuitous ARP messages sent on an interface

vrrp_garp_interval 0.001 # decimal,seconds (resolution usecs). Default 0.

# Delay in ms between unsolicited NA messages sent on an interface

vrrp_gna_interval 0.000001 # decimal,seconds (resolution usecs). Default 0.