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..
One of the most important concepts in OSPF is the existence of hierarchy and areas. OSPF allows collections of contiguous networks to be grouped together. Such a group, together with the routers maintaining interfaces to any of the included networks, is called an area. Each area runs a separate copy of the basic link-state routing algorithm. Rather than treating the entire autonomous system as a single link-state domain, the topology of an area can be hidden. It..
When CB Policing re-marks packets instead of discarding them, the design might call for marking more than one field in a packet. For instance, when transmitting into a Frame Relay cloud, it might be useful to mark both DSCP and FR DE when a packet violates the contract. Marking multiple fields in the same packet with CB Policing is called multi-action policing. The police command uses a slightly different syntax to implement multi-action policing. By omitting the actions fro..
Traditional WLAN architecture centers around the wireless access point. Each AP serves as the central hub of its own BSS, where clients located with the AP cell gain an association. The traffic to and from each client has to pass through the AP to reach any other part of the network. Notice that even though an AP is centrally positioned to support its clients, it is quite isolated and self-sufficient. Each AP must be configured individually, although many APs might be config..
You can use the following configuration command to adjust a router's SNMP trap timeout value: Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#snmp-server trap-timeout 60 Router(config)#end Router# To adjust a router's SNMP inform timeout value, use the follow configuration commands: Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#snmp-server inform timeou..
