Configuring Bgp Route Reception Policy - 3Com MSR 50 Series Configuration Manual

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Configuring BGP Route
Reception Policy
To do...
Filter redistributed routes
when advertising them
Reference a routing policy to
filter routes to a peer/peer
group
Reference an ACL to filer
routing information to a
peer/peer group
Reference an AS path ACL to
filer routing information to a
peer/peer group
Reference an IP prefix list to
filer routing information to a
peer/peer group
CAUTION: Only routes passing the specified filter can be advertised.
To configure BGP routing reception policy, use the following commands:
To do...
Enter system view
Enter BGP view
Filter incoming routes
Reference a routing policy to
filter routes from a peer/peer
group
Reference an ACL to filter
routing information from a
peer/peer group
Reference an AS path ACL to
filter routing information from
a peer/peer group
Reference an IP prefix list to
filter routing information from
a peer/peer group
Specify the maximum number
of routes that can be received
from a peer/peer group
Controlling Route Distribution and Reception
Use the command...
filter-policy { acl-number |
ip-prefix ip-prefix-name }
export [ direct | isis
process-id | ospf process-id |
rip process-id | | static ]
peer { group-name |
ip-address } route-policy
route-policy-name export
peer { group-name |
ip-address } filter-policy
acl-number export
peer { group-name |
ip-address } as-path-acl
as-path-acl-number export
peer { group-name |
ip-address } ip-prefix
ip-prefix-name export
Use the command...
system-view
bgp as-number
filter-policy { acl-number |
ip-prefix ip-prefix-name }
import
peer { group-name |
ip-address } route-policy
policy-name import
peer { group-name |
ip-address } filter-policy
acl-number import
peer { group-name |
ip-address } as-path-acl
as-path-acl-number import
peer { group-name |
ip-address } ip-prefix
ip-prefix-name import
peer { group-name |
ip-address } route-limit limit
[ percentage ]
845
Remarks
Required to choose any;
The filtering is not configured
by default;
You can configure a filtering
policy as needed;
If several filtering policies are
configured, they are applied
in the following sequence:
filter-policy export
■
peer filter-policy export
■
peer as-path-acl export
■
peer ip-prefix export
■
peer route-policy export
■
Only routes passing the first
policy, can they go through
the next; and only routes
passing all the configured
policies, can they be
advertised.
Remarks
-
-
Required to choose any;
No inbound filtering is
configured by default;
You can configure a filtering
policy as needed;
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 the first
policy, can they go through
the next; and only routes
passing all the configured
policies, can they be received.
The number is unlimited by
default.