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Home > Archive > CCNA > October 2002 > router_esimv1
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| dasaint 2002-10-05, 12:55 pm |
| hello guys
when practicing the router_esimV1, of which provision was only made to use rip as its routing protocol, each network had different classes of ip addresses. so i kind of got confused on what network address to put in the network section i.e
(config-router)#network xxxx
though i finally put a default value of 0.0.0.0, which gave me a 100% ping rate, but i would like to find out if i did the right thing.
i am also writing the exam this month so guys i need your advice on the exam
thanks
chris | |
| edmonds_robert 2002-10-05, 3:39 pm |
| You're a CCIE and you're asking a simple question on configuring RIP? Hmmmm.
Anyway, what you should do is put the major network numbers in there. It doesn't really matter what class of network address you're using. What's more important with RIP (at least version 1), is that it doesn't send subnet masks out with the routing updates, so whatever subnet mask you configure on that router should be consistent across the entire network. | |
| dasaint 2002-10-06, 10:42 am |
| sorry guys,
i must have made a mistake when filling my registration form, i am not a CCIE or should i say not yet, i am preparing to write my CCNA for the first time.
guys i have reading thru ccna by Todd Lammle you know sybex, and i am kind of confused about STP you konw the section on root bridge, root port, designated port, and non designated port. i would apreciate, if you guys could write to clarify me on that | |
| vschristopher 2002-10-07, 2:27 am |
| well to ser RIP we only need to know the network addresses of directly connected devices. rest RIP does itself. | |
| edmonds_robert 2002-10-07, 1:40 pm |
| I'm not sure which part you're confused on, so I'll try to explain what I understand about each part.
First STP's (Spanning Tree Protocol) most important function is to create loop free paths through a switched network. It does this by selecting a root bridge as a reference point for the rest of the network, enabling ports that are closest to it and blocking redundant links that are not as close, removing the loops.
The root bridge can either be dynamically elected or configured manually by setting the bridge priority on a switch. If set manually, the bridge with the lowest bridge priority will become the root bridge. If left to elections, the bridge with the lowest MAC address will become the root bridge. Again, this bridge is the reference point all other bridges use to determine which is the root port and which gets blocked.
The root port is the port on the switch that is closest to the root bridge. This is determined by comparing information learned from BPDU's (Bridge Protocol Data Units) that have arrived on each port. In the BPDU is information about the upstream switches and their links. The port that has the BPDU with the lowest cost to the root bridge becomes the root port. All other ports with a path to the root bridge are placed in blocking mode, eliminating loops.
A designated bridge is the bridge on each LAN that provides the minimum root path cost. A LAN's designated bridge is the only bridge allowed to forward frames to and from the LAN for which it is the designated bridge. A LAN's designated port is the port that connects it to the designated bridge.
Hope this helps |
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