Broadcast Configuration over NBMA
If the NBMA cloud is fully meshed, IS-IS broadcast is an option (although it is not recommended). If used, IS-IS treats the cloud as a broadcast medium and elects a DIS. If you manually choose the DIS, you must take into consideration the topology, data flow, and router capacity. This option is discouraged because of its complexity. The configuration is more involved and the topology is less efficient. Remember that hello and routing updates are used differently ..
The show ip ospf border-routers Command
The show ip ospf border-routers command shows the ABRs and ASBRs that the internal router has in its routing table. This command is excellent for troubleshooting configuration errors and understanding how the network is communicating. In a multiarea network, the show ip ospf border-routers command can immediately indicate why users cannot connect outside their area: Router#show ip ospf border-routers Example 7-9 shows the output of this command. Exa..
Source-Based Distribution Trees
Dense-mode routing protocols are suitable for dense topology in which there are many multicast group members relative to the total number of hosts in a network. When a PIM-DM router receives a multicast packet, it first performs the RPF check. If the RPF check succeeds, the router forwards a copy of the packet to all the PIM neighbors except the one on which it received the packet. Each PIM-DM router repeats the process and floods the entire network with the group traffic. Ul..
RSVP-DiffServ integration provides a translation between RSVP and DiffServ technologies that is intended to leverage the strengths of each model. RSVP is used for bandwidth reservation at the edge of the network (where there are fewer flows and the most bandwidth constraints), but DiffServ is used over the backbone network so that the backbone routers do not have to keep per-flow states. This topology is shown in Figure 8-4. Figure 8-4. RSVP-DiffServ Integration [View full s..
If you want to increase the number of VTY ports available on the router for remote access, create a reference to the additional lines in the configuration as follows: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z.Router1(config)#line vty 0 9Router1(config-line)#exitRouter1(config)#endRouter1# This command defines the characteristics for a range of VTY ports from 0 to 9. Since ports 0 to 4 exist by default, this has the effect of ..
