Avaya Configuring IP, ARP, RIP, and OSPF Services Manual de usuario Pagina 193
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Customizing OSPF Services
117356-E Rev 00
6-23
Using Point-to-Multipoint Interfaces in a Star Topology
The Bay Networks proprietary point-to-multipoint solution is intended for routers
running OSPF in star frame relay topologies. OSPF point-to-multipoint interfaces
provide an efficient means to connect routers in a star topology.
Figure 6-3
, for example, shows a point-to-multipoint topology in which four AN
®
routers are connected by frame relay links to a BCN
®
router. The AN routers are
the spokes of the topology, and the BCN router is the hub. All of the routers are
running OSPF.
The BCN router is connected to the frame relay network over a PVC in group
mode. The AN routers are connected over PVCs in direct or group mode. The
routers are configured as follows:
• The hub of the star topology -- the BCN router in Figure 6-3
-- is configured
with a point-to-multipoint interface to the PVC and is set to be the OSPF
designated router in the network. The Router Priority parameter is set to a
value greater than 0.
• Each spoke of the star -- the AN routers in Figure 6-3
-- is configured with a
point-to-multipoint interface to the PVC and is made ineligible to become the
designated router. The Router Priority parameter on each AN is set to 0.
When the spokes of the topology (the AN routers) are computing routes through
the other spokes, the next hop is forced to be the hub (the BCN router). The hub
can then forward the packet to the correct spoke.
4. Choose
Interfaces
. The OSPF Interfaces window opens.
5. Click on the OSPF interface that you want
to edit.
The parameter values for that interface
appear in the OSPF Interfaces window.
6. Set the
Type
parameter. Click on
Help
or
see the parameter description on page
A-41
.
7. Click on
Apply
, and then click on
Done
. You return to the Configuration Manager
window.
Site Manager Procedure
(continued)
You do this System responds
- Configuring IP, ARP, RIP 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 117356-E Rev 00 10
- Before You Begin 17
- Text Conventions 18
- Acronyms 19
- Related Publications 21
- How to Get Help 22
- Chapter 1 23
- IP Addresses 24
- Subnet Addressing 26
- Supernet Addressing 29
- Autonomous Systems 30
- Figure 1-4. ARP Example 32
- OSPF Neighbors 35
- Neighbor Adjacencies 35
- Designated Routers 36
- OSPF Areas 37
- OSPF Router Types 39
- AS External Routes 39
- OSPF Implementation Notes 40
- Router Discovery Protocol 41
- Route Preferences 41
- Route Weights 42
- Figure 1-6. IP Routing Table 44
- IP Traffic Filters 47
- Chapter 2 49
- Starting IP Services 49
- Starting RIP 51
- Starting OSPF 52
- Starting Router Discovery 52
- Adding RIP to an IP Interface 55
- RIP advertises subnets 61
- Chapter 3 63
- Caution: 80
- Customizing an IP Interface 82
- Configuring an SMDS Address 98
- Using the BCC 101
- Using Site Manager 102
- Deleting IP from an Interface 105
- Defining a Static Route 109
- (continued) 111
- (continued) 112
- Choosing a Broadcast Type 115
- Chapter 4 119
- <state> 120
- Figure 4-1. Proxy ARP Example 125
- Chapter 5 131
- Customizing RIP Services 131
- Defining a RIP Accept Policy 154
- Chapter 6 171
- Customizing OSPF Services 171
- Figure 6-1. OSPF ASE Routes 179
- Specifying the Metric Cost 203
- Appendix A 241
- Site Manager Parameters 241
- IP Parameters 242
- IP Interface Parameters 244
- IP Global Parameters 259
- Static Route Parameters 266
- Adjacent Host Parameters 270
- Router Discovery Parameters 273
- OSPF Parameters 275
- OSPF Interface Parameters 280
- OSPF Area Parameters 289
- Area Range Parameters 293
- OSPF NSSA Range Parameters 296
- RIP Parameters 302
- Appendix B 309
- Routing Policy Parameters 309
- RIP Accept Policy Parameters 313
- OSPF Accept Policy Parameters 314
- Appendix C 331
- RIP Export Filters 335
- OSPF Import Filters 338
- OSPF Export Filters 339
- Appendix D 343
- Route Weight Worksheet 343
- Appendix E 347
- IP/OSPF Configuration Example 347
- Area 0.0.0.1STUB area 0.0.0.2 348
- Backbone 0.0.0.0 348
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