To improve the static route management in previous releases, the IP Static Routing Table Manager feature was added to this release, allowing users to change static routes directly. This new table is separate from the System Routing Table, which the router uses to make forwarding decisions. Although the tables are separate, entries in the Static Routing Table Manager will automatically be reflected in the System Routing Table if the next hop address in the static route is reachable and the static route is enabled.
The table is indexed by three attributes (Destination Network, Destination Mask, and Next Hop), and the maximum number of entries is 500. Static route insertion must be done through the Static Routing Table, while static route deletion can be done through either the Static Routing Table or the System Routing Table.
Note:
Only active static routes will be seen in the System Routing Table. A static route is active only if the route is enabled and the next hop address is reachable; that is, there is a valid ARP entry for the next hop.
You can enter multiple routes (multiple default routes, for example) that have different costs, and the lowest-cost route that is reachable will be used in the routing table. Note that if you enter multiple next hops for the same route with the same cost, the software does not replace the existing route. If you enter the same route with the same cost with a different next hop, the first route is used. However, should that first route become unreachable, the second route (with a different next hop) is activated with no loss of connectivity.
An active static route will become inactive and disappear from the System Routing Table if the route is disabled or the next hop is not reachable. If the next hop of an enabled but inactive static route becomes reachable, the route will become active and will be added to the System Routing Table. However, static routes, whether enabled or disabled, can be found in the Static Routing Table.
Static routes provide a way to create routes to destination IP address prefixes manually.
To create a static IP route:
| The IP Routing IP dialog box opens with the Static Route tab displayed. |
| The Insert Static Route dialog box is displayed. |
NOTE: THIS SCREEN MAY CHANGE, PER REVIEW TEAM ON 4/19.
| The route appears in the routing table. |
Dest
Shows the destination network address.
Mask
Shows the destination mask.
NextHop
Displays the next hop IP address
Metric
Displays the primary routing metric for this route. If this metric is not used, set the value to 1.
IfIndex
Displays the local interface through which the next hop of this route should be reached.
Preference
[To be implemented in a future release.]
Enable
Sets whether the configured static route is available on the port. The default is enable.
Note: If a static route is disabled, it must be enabled before it can be added to the system routing table.
Status
Displays whether the Static Route is active or inactive.