IP SLA选项卡

配置>模板& Policies > TCAs > IP SLA

使用投票过程，IP SLA(Internet Protocol Service Level Agreement) tracking provides the ability to generate specific actions in the network that are completely dependent on the state of an IP interface or tunnel. The goal is to prevent black-holed traffic. For example, associated IP subnets could be removed from the subnet table, and also from subnet sharing, if the LAN-side interfaces on an appliance go down.

此选项卡显示在选定设备上配置的所有IP SLA规则。要添加或修改规则，请单击表中任何行左侧的编辑图标。

IP SLA监视器用例

这following examples describe five basic use cases for IP SLA monitoring.

示例＃1 - ping通过界面

配置了两个用于Internet突破和高可用性的通行隧道。
如果主要的通行隧道降落，则流量将进入备用隧道。
这IP SLA Rule看起来像这样，same tunnel specified for the下and提高行动。

Example #2 – HTTP/HTTPS via Interface

配置了两个用于Internet突破和高可用性的通行隧道。
如果主要的通行隧道降落，则流量将进入备用隧道。
这IP SLA Rule看起来像这样，same tunnel specified for the下and提高行动。
In theURL（S）字段，仅在指定https时才需要协议标识符，如https://www.google.com.

Example #3 – Monitor Interface

OnEdgeConnect - A, we want subnet advertising to be conditional onLAN0being up.
它的IP SLA Rule看起来像这样，Default Subnet Action要恢复广告子网。

Example #4 – Monitor Interface (WAN0) to Ensure High Availability

如果WAN0下降VRRP主, we want to decrease its Priority so that traffic goes to theVRRP备份。
它的IP SLA Rule看起来像这样，Default Subnet Action要恢复原始优先级。

NOTE:In this instance, theWAN0interface was given the labelMPLSto match the service to which it connected.

Example #5 – Monitor VRRP

To monitor the VRRP router state, useVRRP Monitorand specify the interface on which the VRRP instance is configured.
In this example, it isLAN0。
Here we are looking at an instance where the VRRP role changes, but priority does not, for whatever reason.
它的IP SLA Rule看起来像这样，Default Subnet Action要恢复原始优先级。

NOTE:In this instance, theWAN0interface was given the labelMPLSto match the service to which it connected.
另一个选择是指定下动作=修改子网公制。这Web UI automatically produces another field in which you can add a positive value to the current subnet metric.UP Action =默认子网操作将将子网指标返回其原始值。

IP SLA Edit Row

Use this dialog box to set rules to your IP SLA. Define the Monitor and Actions by completing the following steps.

Monitor

这re are four options to choose from for a Monitor:

Option	描述
界面	Monitors the operational status of a specific local interface.
Ping	监视特定IPv4地址的可及性。
HTTP/HTTPS	监视HTTP/HTTPS端点的可及性。
VRRP Monitor	Monitors the VRRP router state (TRUE if Master; FALSE if Backup) for a VRRP instance(s) on an interface.

Based on the Monitor chosen, the Web UI displays the appropriate fields and options.

动作

这re are eight available下动作：

下Action	描述
删除自动子网	Remove from the subnet table an auto subnet for a port (including all VLAN and subinterface subnets).
增加VRRP优先级	将配置的VRRP路由器的优先级提高了三角洲金额。
降低VRRP优先级	Decrease the configured VRRP router priority by a delta amount.
启用隧道	Enable a passthrough (internet breakout) tunnel Up for IP Tracking (SLA) purposes.
禁用隧道	禁用以进行IP跟踪（SLA）目的的通行（Internet突破）隧道。隧道不再可用于负载平衡目的（当负载在多个通行隧道之间平衡流量时），尽管它仍然可以用作交通转发的最后手段。
Disable Subnet Sharing	禁用其他EdgeCon子网子网的共享nect peers on the appliance.
修改子网度量	Add a metric delta to the metric of all subnets shared with EdgeConnect peers.
广告子网	向EdgeConnect同行做广告。

有两个默认提高行动：

Up Action	描述
Default Subnet Action	这恢复了任何下Action返回正常状态。例子：如果下Action=Disable Subnet Sharing，UP ACTION重新启用子网共享。如果下Action=删除自动子网，UP动作重新添加了自动子网。如果下Action=修改子网度量, the Up Action restores subnet metrics to their original values.
VRRP Default	Reverts the VRRP priority back to the configured value.

NOTE:如果a defaultUp Actionis used, it must match the下Action。