To add a Global Route Table to a VPRN site

Purpose

Packets within a VRF are able to perform a parallel lookup against a Global Route Table (GRT), as well as within the local VRF. A successful routing table match found in the local VRF is typically preferred over any match found in the GRT. However, a static route can be used to allow for specific prefixes covered by the static route to fail the lookup in the local VRF table, thus resulting in the guaranteed use of a route from the GRT.

The GRT is populated by defining export policies for each participating VPRN service, and the maximum number of routes that are exported from a specific VRF can be limited.

Note: The addition of a GRT to a VPRN service is supported on the 7450 ESS in mixed mode, 7705 SAR and 7750 SR.

Steps
 
1 

Choose Manage→Service→Services from the NFM-P main menu. The Manage Services form opens.

2 

Choose the required VPRN service and click Properties. The VPRN Service (Edit) form opens.

3 

On the service navigation tree, expand Sites→Routing Instance, right-click on a site and choose Properties. The VPRN Site (Edit) form opens.

4 

Click on the Routing tab and configure the Enable GRT Lookup parameter.

Enable the Allow Local Management parameter to enable SNMP/Telnet/SSH/FTP traffic to flow to the base dystem IP interface via the VPRN service.

5 

Click on the GRT Export Policies tab and configure the required parameters.

6 

Select up to five export policies.

7 

Save the changes and close the forms.

End of steps