system tracker, vpn 0 interface tracker—Track the status of transport interfaces that connect to the internet (on vEdge routers only).
Tracking the interface status is useful when you enable NAT on a transport interface in VPN 0 to allow data traffic from the router to exit directly to the internet rather than having to first go to a router in a data center. In this situation, enabling NAT on the transport interface splits the TLOC between the local router and the data center into two, with one going to the remote router and the other going to the internet.
When you enable transport tunnel tracking, the software periodically probes the path to the internet to determine whether it is up. If the software detects that this path is down, it withdraws the route to the internet destination, and traffic destined to the internet is then routed through the data center router. When the software detects that the path to the internet is again functioning, the route to the internet is reinstalled.
vManage Feature Template
For vEdge routers only:
- Configuration ► Templates ► System
- Configuration ► Templates ► VPN Interface Cellular (for vEdge cellular wireless routers only)
- Configuration ► Templates ► VPN Interface Ethernet
- Configuration ► Templates ► VPN Interface NAT Pool
- Configuration ► Templates ► VPN Interface PPP
system tracker tracker-name endpoint-dns-name dns-name endpoint-ip ip-address interval seconds multiplier number threshold milliseconds
- DNS Name of Interface End Point
- endpoint-dns-name dns-name
DNS name of the end point of the tunnel interface. This is the destination in the internet to which the router sends probes to determine the status of the transport interface. For each tracker, you must configure either one DNS name or one IP address or URL.
- IP Address of Interface End Point
- endpoint-ip ip-address
IP address of the end point of the tunnel interface. This is the destination in the internet to which the router sends probes to determine the status of the transport interface. For each tracker, you must configure either one DNS name or one IP address or URL.
- Interval between Status Probes
- interval seconds
How often probes are sent to determine the status of the transport interface.
Range: 10 through 600 seconds
Default: 60 seconds (1 minute)
- Number of Retries
- multiplier number
Number of times to resend probes before declaring that the transport interface is down.
Range: 1 through 10
- Time To Wait for Response
- threshold milliseconds
How long to wait for the probe to return a response before declaring that the transport interface is down.
Range: 100 through 1000 milliseconds
Default: 300 milliseconds
- Tracker Name
Name of the tracker. tracker-name can be up to 128 lowercase letters. You can configure up to eight trackers. You can apply only one tracker to an interface.
show running-config system
Enable transport tracking on a NAT interface:
system tracker nat-tracker endpoint-ip 188.8.131.52 vpn 0 interface ge0/1 nat tracker nat-tracker
Command introduced in Viptela Software Release 17.2.2.