HP HSR6800 Configuration Manual page 271

Step
4. Configure route targets.
5. Set the maximum number of
routes allowed by the VPN
instance.
6. Apply an import routing
policy.
7. Apply an export routing
policy.
NOTE:
• Route related attributes configured in VPN instance view are applicable to both IPv4 VPNs and
IPv6 VPNs.
• You can configure route related attributes for IPv4 VPNs in both VPN instance view and IPv4
VPN view. Those configured in IPv4 VPN view take precedence.
Configuring a tunneling policy for a VPN instance
When multiple tunnels exist in an MPLS L3VPN network, you can configure a tunneling policy to
specify the type and number of tunnels to be used by using the tunnel select-seq command or the
preferred-path command.
With the tunnel select-seq command, you can specify the tunnel selection preference order and the
number of tunnels for load balancing.
With the preferred-path command, you can configure preferred tunnels that each correspond to a
tunnel interface.
After a tunneling policy is applied on a PE, the PE selects tunnels in this order:
•
The PE matches the peer PE address against the destination addresses of preferred tunnels,
starting from the tunnel with the smallest number. If no match is found, the local PE selects
tunnels as configured by the tunnel select-seq command or the default tunneling policy if the
tunnel select-seq command is not configured. The default tunneling policy selects only one
tunnel (no load balancing) in this order: LSP tunnel, GRE tunnel, CR-LSP tunnel.
•
If a matching tunnel is found and the tunnel is available, the local PE stops matching other
tunnels and forwards the traffic to the specified tunnel interface.
Command
vpn-target vpn-target&<1-8>
[ both | export-extcommunity |
import-extcommunity ]
routing-table limit number
{ warn-threshold | simply-alert }
import route-policy route-policy
export route-policy route-policy
263
Remarks
A single vpn-target command
can configure up to eight route
targets. You can configure up to
64 route targets for a VPN
instance.
Optional.
By default, a VPN instance
supports 100000 routes at most.
Setting the maximum number of
routes for a VPN instance is for
preventing too many routes from
being redistributed into the PE.
Optional.
By default, all routes matching the
import target attribute are
accepted.
Make sure the routing policy
already exists. Otherwise, the
device does not filter received
routes.
Optional.
By default, routes to be advertised
are not filtered.
Make sure the routing policy
already exists. Otherwise, the
device does not filter routes to be
advertised.