Difference between revisions of "CCNA Explorer 2 Static Routing"
From Teknologisk videncenter
m (→Routing table Principles and Static Routes) |
m (→Routing Table Principles and Static Routes) |
||
| Line 113: | Line 113: | ||
|} | |} | ||
===Routing Table Principles and Static Routes=== | ===Routing Table Principles and Static Routes=== | ||
| − | Alex Zinin's Routing Principles: | + | Alex Zinin's Routing Principles:<br/><br/> |
'''Principle 1''': "Every router makes its decision alone, based on the information it has in its own routing table."<br/> | '''Principle 1''': "Every router makes its decision alone, based on the information it has in its own routing table."<br/> | ||
'''Principle 2''': "The fact that one router has certain information in its routing table does not mean that other routers have the same information."<br/> | '''Principle 2''': "The fact that one router has certain information in its routing table does not mean that other routers have the same information."<br/> | ||
'''Principle''' 3: "Routing information about a path from one network to another does not provide routing information about the reverse, or return path." | '''Principle''' 3: "Routing information about a path from one network to another does not provide routing information about the reverse, or return path." | ||
Revision as of 20:06, 21 October 2010
Contents
Static Routing
Routers and Network
Examining the Connections of the Router
Examining Router Interfaces
Vis kommandoerne i packet tracer
|
Configure an Ethernet Interface
R1(config)#interface fastethernet 0/0 R1(config-if)#ip address 172.16.3.1 255.255.255.0 R1(config-if)#no shutdown
Verify Ethernet interfaces
show interfaces fastethernet 0/0
show ip interface brief
Router#show running-config <output omitted> interface FastEthernet0/0 ip address 172.16.3.1 255.255.255.0 <output omitted>
Router(config-if)#int fa0/1 Router(config-if)#ip address 172.16.3.2 255.255.255.0 172.16.3.0 overlaps with FastEthernet0/0 Router(config-if)#
Configure A Serial Interface
Router(config)#interface serial 0/0/0 Router(config-if)#ip address 172.16.2.1 255.255.255.0 Router(config-if)#no shutdown
Examining Router Interfaces
Exploring Directly Connected Networks
Verify Changes to the Routing Table
Router(config)#interface fastethernet 0/0 Router(config-if)#no shut %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up RT: interface FastEthernet0/0 added to routing table RT: add 10.0.0.0/24 via 0.0.0.0, connected metric [0/0] Router(config-if)#end Router#undebug all
Devices on Directly Conncected Networks
Cisco Discovery Protocol (CDP)
Find lag 2 naboer med CDP
CDP privides the following information:
- Device identifiers - For example, the configured host name of a switch
- Address list - Up to one Network layer address for each protocol supported
- Port identifier - The name of the local and remote port-in the form of an ASCII character string such as ethernet0
- Capabilities list - For example, whether this device is a router or a switch
- Platform - The hardware platform of the device; for example, a Cisco 7200 series router
Vis cdp naboer i packet tracer...
Using CDP for Network Discovery
CDP er en sikkerhedsrisiko da den giver information omkring ens udstyr. Det bør derfor slåes fra på porte ud mod brugerne.
Disable globaly:
Router(config)#no cdp run
Disable per interface:
Router(config-if)#no cdp enable
Static Routes with "Next Hop" Addresses
Purpose and Command Syntax of ip route
Configure Static Routes
Routing Table Principles and Static Routes
Alex Zinin's Routing Principles:
Principle 1: "Every router makes its decision alone, based on the information it has in its own routing table."
Principle 2: "The fact that one router has certain information in its routing table does not mean that other routers have the same information."
Principle 3: "Routing information about a path from one network to another does not provide routing information about the reverse, or return path."