You can configure the default edge gateway for static routes and specify dynamic routing details for an edge gateway.

1

Log in to vCloud Air and navigate to the vCloud Edge Gateway Services UI.

See Log In and Navigate to Advanced Networking Services for information.

2

Click the Routing tab and Global Configuration.

3

To enable Equal-cost multi-path routing (ECMP), click Enable next to ECMP.

ECMP is a routing strategy that allows next-hop packet forwarding to a single destination can occur over multiple best paths. These best paths can be added statically or as a result of metric calculations by dynamic routing protocols like OSPF or BGP. Multiple paths for static routes can be added by providing multiple next hops separated by commas in the Static Routes dialog box.

See Add a Static Route for information.

The edge gateway utilizes Linux network stack implementation, a roundrobin algorithm with a randomness component. After a next hop is selected for a particular source and destination IP address pair, the route cache stores the selected next hop. All packets for that flow go to the selected next hop. The default IPv4 route cache timeout is 300 seconds (gc_timeout). When an entry is inactive for this time, it is eligible to be removed from the route cache. The actual removal happens when the garbage collection timer activates (gc_interval = 60 seconds).

4

To specify the default gateway, click Edit next to Default Gateway.

a

Select an interface from which the next hop towards the destination network can be reached.

b

Type the gateway IP address if required.

c

Edit the MTU if required and type a description.

d

Click Save.

5

To configure dynamic routing, click Edit next to Dynamic Routing Configuration.

Note

If you have IPsec VPN configured in your environment, you should not use dynamic routing.

a

Select the router ID.

The Router ID list displays the first uplink IP address of the edge gateway that pushes routes to the kernel for dynamic routing.

b

Select Enable Logging to save logging information and select the log level.

c

Click OK.

6

Click Publish Changes.

To delete routing configuration, click Reset. This deletes all routing configurations (default, static, OSPF, and BGP configurations, as well as route redistribution).

Configure route redistribution. See Configure Route Redistribution.

Configure dynamic routing. See the following topics:

Configure BGP

Configure OSPF