632 Chapter 8: WAN Protocols and Design
multipoint subinterfaces, those three subinterfaces should have been in the same IP subnet and
IPX network. Table 8-35 gives the planned Layer 3 addresses for the configurations using
multipoint among those three routers.
Assuming the DLCIs in Figure 8-40, Example 8-48, Example 8-49, and Example 8-50, show
the configurations for Routers A, B, and E, respectively, using multipoint subinterfaces for the
VCs between A, D, and E.
Table 8-56
Scenario 8-4 Layer 3 Address Planning Chart, Multipoint A-D-E
Interface
Subinterface
IP Address
IPX Address
A's Ethernet
168.15.101.1
101.0200.AAAA.AAAA
B's Ethernet
168.15.102.1
102.0200.BBBB.BBBB
C's Ethernet
168.15.103.1
103.0200.CCCC.CCCC
D's Ethernet
168.15.104.1
104.0200.DDDD.DDDD
E's Ethernet
168.15.105.1
105.0200.EEEE.EEEE
A's S0
2
168.15.202.1
202.0200.AAAA.AAAA
A's S0
3
168.15.203.1
203.0200.AAAA.AAAA
A's S0
1
168.15.200.1
200.0200.AAAA.AAAA
B's S0
2
168.15.202.2
202.0200.BBBB.BBBB
C's S0
3
168.15.203.3
203.0200.CCCC.CCCC
D's S0
1
168.15.200.4
200.0200.DDDD.DDDD
E's S0
1
168.15.200.5
200.0200.EEEE.EEEE
Example 8-48
Router A Configuration, Scenario 8-4
ipx routing 0200.aaaa.aaaa
!
interface serial0
encapsulation frame-relay
!
interface serial 0.1 multipoint
ip address 168.15.200.1 255.255.255.0
ipx network 200
frame-relay interface-dlci 54
frame-relay interface-dlci 55
!
interface serial 0.2 point-to-point
ip address 168.15.202.1 255.255.255.0
ipx network 202
interface-dlci 52
!
interface serial 0.3 point-to-point
ip address 168.15.203.1 255.255.255.0
ipx network 203
ch08.fm Page 632 Monday, March 20, 2000 5:17 PM