Cisco CCNP / BSCI Test Tutorial: 10 IP Routing Facts It's essential to Know!
To move the BSCI Test and gain your CCNP, you’ve got to keep a great deal of aspects in mind. It’s simple to overlook the “less difficult” protocols and providers such as static routing and distance vector protocols. Using this in your mind, listed here’s a quick assessment of some particulars you should know for success during the exam area and actual-entire world networks!
When packets need to be routed, the routing desk is parsed with the longest prefix match if numerous paths exist with the same prefix size, the route with the bottom AD is desired. If there remain many valid paths, equivalent-Price tag load-sharing goes into effect.
The ip route command is made use of to create static routes the command ip route 0.0.0.0 0.0.0.0 < next-hop-IP or regional exit interface> makes a default static route.
A static route using a up coming-hop IP tackle has an Advertisement of one, although a static route with an area exit interface has an Advertisement of zero.
A floating static route is often a static route by having an Advertisement better than that of your dynamic routing protocols functioning within the router, making certain which the static route can only be applied In the event the routing protocol goes down.
On-Desire Routing (ODR) is simply suitable inside a hub-and-spoke community. The spokes properly become stub routers. ODR employs Cisco Discovery Protocol (CDP) to send route information and facts.
To propagate a default route with IP routing, use the ip default-community command. To do so with IP routing disabled, use ip default-gateway. It's also possible to redistribute a static route into most protocols, although not IGRP. IGRP isn't going to comprehend a static route to 0.0.0.0.
The ip helper-tackle command can take specified broadcasts and interprets then into unicasts as a way to allow the router to ahead them. These default ports are:
TIME, port 37
TACACS, port 49
DNS, port fifty three
BOOTP/DHCP Server, port 67
BOOTP/DHCP Customer, port 68
TFTP, port sixty nine
NetBIOS name services, port 137
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To call other ports, make use of the ip forward-protocol command. To remove any of such ports within the default list, utilize the no ip ahead-protocol command.
ICMP Router Discovery Protocol (IRDP) hosts listen to multicast Hellos from routers, letting host-router discovery. HSRP routers develop a virtual router that hosts think is a real router. Each protocols assist networks cut over to a purposeful router quickly when their Main router goes down.