VPN 3000 Series Concentrator Reference Volume II: Administration and Monitoring, Release 3.6
Routing Table
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Routing Table
 Monitoring | Routing Table

Routing Table

Monitoring | Routing Table

This screen shows the VPN Concentrator routing table at the time the screen displays. The IP routing subsystem examines the destination IP address of packets coming through the VPN Concentrator and forwards or drops them in accordance with configured parameters. The routing table shows the valid forwarding paths that the IP routing subsystem knows about, from whatever source: static routes, learned via routing protocols, interface addresses, etc. However, the table lists only the best routes—based on metric and type—with duplicates removed.

To configure routing, see the Configuration | System | IP Routing and Configuration | Interfaces screens.


Figure 11-1   Monitoring | Routing Table Screen


Refresh

To update the screen and its data, click Refresh. The date and time indicate when the screen was last updated.

Clear Routes

Click the Clear Routes button to clear the dynamic routing entries, such as RIP and OSPF, from the display. Clicking this button does not affect the display of static routing entries.

Valid Routes

The total number of current valid routes that the VPN Concentrator knows about. This number includes all valid routes, and it may be greater than the number of rows in the routing table, which shows only the best routes with duplicates removed.

Address

The packet destination IP address to which this route applies. This address is combined with the subnet mask to determine the destination route. 0.0.0.0 indicates the default gateway.

Mask

The subnet mask for the destination IP address in the Address field. 0.0.0.0 indicates the default gateway.

Next Hop

For remote routes, the IP address of the next system in the path to the destination. 0.0.0.0 indicates a local route. There is no next hop.

Interface

The VPN Concentrator network interface through which traffic moves on this route:

  • 1 = Ethernet 1 (Private) interface.
  • 2 = Ethernet 2 (Public) interface.
  • 3 = Ethernet 3 (External) interface.

Protocol

The protocol or source of this routing table entry:

  • RIP = Learned via Routing Information Protocol.
  • OSPF = Learned via Open Shortest Path First protocol.
  • Static = Configured static route.
  • Local = Local VPN Concentrator interface address.
  • ICMP = Learned from an ICMP (Internet Control Message Protocol) redirect message.
  • Default = The default gateway.

Age

The number of seconds since this route was last updated or otherwise validated. The age is relative to the screen display time, for example: 25 means the route was last validated 25 seconds before the screen was displayed. 0 indicates a static, local, or default route.

Metric

The metric, or cost, of this route. One is the lowest value; sixteen is the highest value.