Adding Multiple BGP Routes to the IP Routing Table
The BGP decision process has an impact on whether BGP adds multiple routes for a single NLRI to the IP routing table. The following statements summarize the logic: ■ If the best path for an NLRI is determined in Steps 0 through 8, BGP adds only one BGP route to the IP routing table—the best route, of course. ■ If the best path for an NLRI is determined at Step 9 or 10, BGP considers placing multiple BGP routes into the IP routing table. ■ Even if multiple BGP rou..
Configuring Bandwidth over a Multipoint Network
In addition to being used in the EIGRP metric, the bandwidth command influences how EIGRP uses NBMA virtual circuits (VCs). If the serial line has many VCs in a multipoint configuration, EIGRP will assume that each VC has an even share of bandwidth. EIGRP will confine itself to using half that share for its traffic. This limitation is important—no other routing protocol does this—but will work best if the bandwidth is correctly defined. A 56-kbps link that has a bandwidth..
Policy routing provides the capability to route a packet based on information in the packet besides the destination IP address. The policy routing configuration uses route maps to classify packets. The route-map clauses include set commands that define the route (based on setting a next-hop IP address or outgoing interface). Policy routing can also mark the IPP field, or the entire ToS byte, using the set command in a route map. When using policy routing for marking purpose..
Use the ntp max-associations configuration command to limit the number of NTP associations the router will accept: Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#ntp max-associations 30 Router(config)#end Router# To prevent oversubscribing valuable router resources by NTP associations, Cisco provides the ability to limit the number of associations that a router will accept. While the ntp max-associations command..
Gigabit Ethernet Port Cables and Connectors
Gigabit Ethernet connections take a different approach by providing modular connectivity options. Catalyst switches with Gigabit Ethernet ports have standardized rectangular openings that can accept gigabit interface converter (GBIC) or small form factor pluggable (SFP) modules. The GBIC and SFP modules provide the media personality for the port so that various cable media can connect. In this way, the switch chassis is completely modular and requires no major change to..
