Nokia Network Voyager, Reference Manual

Page: 336 / 700

6
Configuring Routing
336 Voyager Reference Guide
5.
Enter
100
in the
AS
edit box; then click A
PPLY
.
This is the AS number from which routes are to be filtered.
6.
(Optional) Enter more values in the
I
MPORT
ID
and
AS
edit boxes to
configure more inbound policies based on autonomous system numbers;
then click
A
PPLY
.
Note
By default, all routes originating from the configures ASes are accepted.
You can accept or reject all routes from a particular AS by enabling the
ACCEPT
or
RESTRICT
option next to the
A
LL
BGP
ROUTES FROM
AS
field.
1. You also can accept or reject particular routes from AS 100 by specifying
a route filter. Route filters are specified as shown in the
Route
Redistribution section. Here is an example of how to do this; we assume
we want to filter all routes that are strictly more specific than
10.0.0.0/8
.
In other words, we allow all routes whose prefix is not
10.0.0.0/8
except
for
10.0.0.0/8
itself, but we exclude all routes that are more specific,
such as
10.0.0.0/9
and
10.128.0.0/9
.
2.
To configure this filter, we add
10.0.0.0
in
N
EW
IP
PREFIX TO IMPORT
entry box, and
8
in
M
ASK LENGTH
entry box. Click A
PPLY
.
3.
Select
REFINES
in the
M
ATCH TYPE
pulldown menu. This specifies that
we want routes that are strictly more specific than
10.0.0.0/8
.
4.
Finally, click on
RESTRICT
in the
A
CTION
field. This specifies that we
want to discard the routes that match this prefix.
5.
Click A
PPLY
. The filter is fully configured.
Configuring Route Inbound Policy on Nokia
Platform D Based on ASPATH Regular Expressions
1. Click C
ONFIG
on the home page.
2. Click the Inbound Route Filters link in the Routing Configuration
section.