Enabling Bgp And Igp Route Synchronization; Limiting Prefixes Received From A Peer Or Peer Group - HP MSR2000 series Configuration Manual

Step
3. Configure BGP route
reception filtering
policies.

Enabling BGP and IGP route synchronization

By default, upon receiving an IBGP route, a BGP router checks the route's next hop. If the next hop is
reachable, the BGP router advertises the route to EBGP peers. If the synchronization feature is configured,
in addition to the reachability check of the next hop, the BGP router must find an active IGP route with the
same destination network segment before it can advertise the IBGP route (use the display ip routing-table
protocol command to check the IGP route state).
To enable BGP and IGP synchronization:
Step
1. Enter system view.
2. Enter BGP view.
3. Enable synchronization
between BGP and IGP.

Limiting prefixes received from a peer or peer group

Step
1. Enter system view.
2. Enter BGP view.
Command
•
Filter incoming routes with an ACL or
IP prefix list:
filter-policy { acl-number | ip-prefix
ip-prefix-name } import
•
Reference a routing policy to filter
routes from a peer or peer group:
peer { group-name | ip-address }
route-policy route-policy-name
import
•
Reference an ACL to filter routing
information from a peer or peer
group:
peer { group-name | ip-address }
filter-policy acl-number import
•
Reference an AS path list to filter
routing information from a peer or
peer group:
peer { group-name | ip-address }
as-path-acl as-path-acl-number
import
•
Reference an IP prefix list to filter
routing information from a peer or
peer group:
peer { group-name | ip-address }
ip-prefix ip-prefix-name import
Command
system-view
bgp as-number
synchronization
Command
system-view
bgp as-number
206
Remarks
Configure at least one command.
No route reception filtering is
configured by default.
If several filtering policies are
configured, they are applied in the
following sequence:
4. filter-policy import
5. peer filter-policy import
6. peer as-path-acl import
7. peer ip-prefix import
8. peer route-policy import
Only routes passing all the
configured policies can be received.
Remarks
N/A
N/A
Not enabled by default.
Remarks
N/A
N/A