EIGRP Convergence

Once all the EIGRP routers have learned all the routes in the network, and placed the best routes (the successor routes) in their IP routing tables, their EIGRP processes simply continue to send Hellos, expect to receive Hellos, and look for any changes to the network. When those changes do occur, E...

EIGRP Packet Format

Figure 6-4 shows the EIGRP packet header. Notice that following the autonomous systems number are the Type/Length/Value (TLV) triplets. The TLV triplets carry route entries, as well as provide the fields for DUAL process management. Some common TLVs are the EIGRP parameter TLV, the IP internal rout...

Basic Single Area IS-IS Configuration

This section examines the process of configuring a single IS-IS area using the network in Figure 7-11. Figure 7-11. Single Area IS-IS Network [View full size image] The steps for a basic single area IS-IS configuration are as follows: Step 1. Configure a loopback interface on each OSP...

ustifying the Need for VLANs

The previous section described the technical definition of a VLAN. This section describes practical answers. In a legacy network, administrators assign users to networks based on geography. The administrator attaches the user's workstation to the nearest network cable. If the user belongs to the eng...

Setting the Time Zone

To configure the router's local time zone, use the following configuration command: Router#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#clock timezone EST 5 Router(config)#end Router# The clock timezone configuration command accepts a...

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