H3C Technologies H3C S5820V2 Series Switches - Manual (Page 12)

6
NOTE:
The ip binding vpn-instance command deletes the IP address of the current interface. You must
reconfigure an IP address for the interface after configuring the command.
Configuring route attributes for a VPN instance
The MCE controls VPN route advertisement as follows:
• When a VPN route learned from a site gets redistributed into BGP, BGP associates it with a route
target extended community attribute list, which is usually the export target attribute list of the VPN
instance associated with the site.
• The VPN instance determines which routes it can accept and redistribute according to the
import-extcommunity in the route target.
• The VPN instance determines how to change the route target attributes for routes to be advertised
according to the export-extcommunity in the route target.
To configure route attributes for a VPN instance:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter VPN instance view. ip vpn-instance vpn-instance-name N/A
3. (Optional) Enter IPv4 VPN
view.
ipv4-family N/A
4. Configure route targets for the
VPN instance.
vpn-target vpn-target&<1-8>
[ both | export-extcommunity |
import-extcommunity ]
No route target is configured for
the VPN instance by default.
5. (Optional) Configure the
maximum number of routes for
the VPN instance.
routing-table limit number
{ warn-threshold | simply-alert } The maximum route number is not
configured by default.
NOTE:
You can define the maximum number of routes for a VPN instance to prevent too many routes from being
redistributed into the PE.
Configuring routing on an MCE
MCE implements service isolation through route isolation. MCE routing configuration includes:
• MCE-VPN site routing configuration
• MCE-PE routing configuration
Configuration prerequisites
Before you configure routing on an MCE, complete the following tasks:
• Configure VPN instances, and bind the VPN instances with the interfaces connected to the VPN
sites and the PE.
• Configure the link layer and network layer protocols on related interfaces to ensure IP connectivity.