Filter
Top Products
done by configuring routers 1.18 and 2.21 to only accept routes to areas 3, 4, 6,
and 8 from domain A. Routers 2.17 and 2.21 would only accept routes for areas 5
and 9 from domain B.
Therefore, nodes in the intersection see a universe that contains areas 1 and 2
from the intersection, areas 3, 4, 6, and 8 from domain A, and areas 5 and 9 from
domain B.
To configure router 1.18 in Figure 19, enter the following NCP commands and
parameters:
NCP> def mod routing-filter circ eth/0 outgoing area 1,2
NCP> def mod routing-filter circ eth/0 outgoing state on
NCP> def mod routing-filter circ eth/0 incoming area 3,4,6,8
NCP> def mod routing-filter circ eth/0 incoming state on
NCP> def mod routing-filter circ ppp/0 outgoing area 1,2
NCP> def mod routing-filter circ ppp/0 outgoing state on
NCP> def mod routing-filter circ ppp/0 incoming area 3,4,6,8
NCP> def mod routing-filter circ ppp/0 incoming state on
5.7
Area 5
Area 3
Area 6
Area 8
Area 4
Area 1
Area 2
Area 3
Area 4
Area 9
Area 5
Domain B
Domain A
Eth/0
PPP/0
Intersection
5.8
1.18
8.3
4.7
2.17 2.21
3.12
4.9
Filtering Fence
Figure 19. Example of Blending DECnet Domains
Using DNA IV
260
MRS V3.2 Protocol Config Ref Vol 2