R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

Table Of Contents
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Only routes permitted by the configured filtering policies can be installed into the local BGP
routing table. The members of a peer group can have different route reception filtering policies
from the peer group.
To configure BGP route reception filtering policies:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number N/A
3. Configure BGP route
reception filtering
policies.
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/peer group:
peer { group-name | ip-address }
route-policy route-policy-name import
Reference an ACL to filter routing
information from a peer/peer group:
peer { group-name | ip-address }
filter-policy acl-number import
Reference an AS path ACL to filter routing
information from a peer/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/peer group:
peer { group-name | ip-address } ip-prefix
ip-prefix-name import
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:
filter-policy import
peer filter-policy import
peer as-path-acl import
peer ip-prefix import
peer route-policy import
Only routes passing all the
configured policies can be
received.
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 to 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:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number N/A
3. Enable synchronization between
BGP and IGP.
synchronization Not enabled by default.
Limiting prefixes received from a peer/peer group
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A