H3C Technologies H3C S7500E Series Switches - Manual (Page 27)

1-15
To do… Use the command… Remarks
Apply a filter policy to the routes to
be advertised
filter-policy { acl-number |
ip-prefix ip-prefix-name } export
[ direct | isis process-id | ospf
process-id | rip process-id |
static ]
Optional
By default, routes to be advertised
are not filtered.
Apply a filter policy to routes
received
filter-policy { acl-number |
ip-prefix ip-prefix-name } import
Optional
By default, received routes are not
filtered.
Configure to permit the routes
with their AS numbers contained
in their AS_PATH attributes being
the local AS number (this
operation can also specify the
number of the AS number
occurrences allowed)
peer { group-name | ip-address }
allow-as-loop [ number ]
Optional
By default, routes with their AS
numbers contained in their
AS_PATH attributes being the
local AS number are denied.
AS number contained in the AS_PATH attribute can be used for route loop detect. With EBGP
running between a MCE and a site, the routes advertised by an MCE device to the site carry the
local AS number. So do the routes advertised by the site. In this case, you need to configure to
permit the routes with their AS numbers contained in their AS_PATH attributes being the local AS
number on MCE devices for the routes advertised by the site to be received and processed by the
MCE device.
2) Configuration on the site
The site configuration procedures vary with device model. The following takes an S7500E Ethernet
switch as an example. As for switches from other vendors, see the corresponding user manuals.
Follow these steps to configure the site:
To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —