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Answers: OSPF Networking Config 1
Tweet OSPF network commands challenge all of us when first learning OSPF. Should you master ACLs, and then return back to OSPF? Just forge ahead with OSPF? This most recent lab gives you practice with...
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EIGRP Unequal Cost Routes
Tweet #EIGRP uses a complex metric calculation. Most of us do not memorize the math formula, instead remembering the metric components: slowest bandwidth in the route and cumulative delay for all...
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Answers: EIGRP Unequal Cost Routes
Tweet This latest lab lets you exercise your basic EIGRP config skills, with a few twists. Does the actual link speed matter? Do you recall how to use wildcard masks in your EIGRP config? And how do...
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OSPF Interface Config 1
Tweet From the first days of OSPF in Cisco routers, OSPF configuration has included a network command. The network command enables OSPF on that router’s interfaces, but it uses indirect logic. In...
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Answers: OSPF Interface Config 1
Tweet Can you configure OSPFv2 without the network command? Today’s post gives you the answers to a recent CLI Lab that lets you practice OSPF interface configuration. Check out the lab, create your...
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Trunking for Only Some VLANs
Tweet VLAN trunks between Cisco Catalyst switches support all VLANs known to the switches. Then add a new VLAN, and the trunk supports it. Is that a good idea? In this post, you will get a chance to...
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Answers: Trunking for Only Some VLANs
Tweet Time to check your config versus this latest lab. Do you recall the command and syntax to restrict a trunk on a Catalyst switch from supporting all VLANs? Go try the lab yourself on paper, then...
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IPv6 Addressing with OSPFv3
Tweet For this latest lab, you configure IPv6 routing, addressing, and OSPFv3, all in one small lab. This next lab is rather long by comparison to most others in this series – it might take you 10-15...
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Answers: IPv6 Addressing with OSPFv3
Tweet In this lab, you will configure global unicast addresses, rely on link local addresses only on some links, and use OSPFv3 to learn routes to the global unicast prefixes. Ready to check your work...
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Basic NetFlow 2
Tweet Cisco added three small network management topics to CCNA R&S for the in 2013 (exams 100-101, 200-101, 200-120). Today’s lab gives you configuration practice with one of those: NetFlow....
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Answers: Basic NetFlow 2
Tweet Loopback interfaces on routers come in handy for many reasons, including cases like this when used by NetFlow for data export to the NetFlow collector. Today’s post shows the answers to a lab...
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OSPFv3 Costs and Multipath
Tweet This latest #CCNA CLI lab catches a variety of small items for OSPFv3 in an IPv6 network. Starting from a pre-configured set of routers with IPv6 addresses, this lab asks you to get OSPFv3...
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Answers: OSPFv3 Costs and Multipath
Tweet This latest lab asks you to configure OSPFv3 to exchange routes in an IPv6 network. Amazingly, you can almost ignore the IPv6 addresses, at least once you believe that the addresses have been...
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HSRP 1
#HSRP solves one of many design issues by avoiding a single point of failure in a network by having two or more routers share the role of default gateway in a subnet. This lab takes a look at a basic...
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Answers: HSRP 1
This #HSRP lab requires just a few lines of configuration, using defaults for pretty much every option. Check here for the original lab, and check your answers in this post below the fold. Figure 1:...
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OSPF Interface Config 2
It’s too easy – enabling OSPF per interface rather than using the old IOS network command. In some ways, we may not trust that it’s that easy. So get some practice with today’s lab, a nice clean set of...
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Answers: OSPF Interface Config 2
Check your latest OSPF interface config here. Do the lab first. You know the drill. Answers Figure 1: Two Routers with IP Subnets Example 3: R1 Config interface GigabitEthernet0/1 ip ospf 50 area 0 !...
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OSPF Network Config 2
What if your #CCNA exam required you to configure the OSPF network command with a particular style of mask? What if it said “match all addresses in the subnet”, or “match all addresses in the classful...
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Answers: OSPF Network Config 2
Everyone should come to the #CCNA game ready to configure OSPF, with network commands, and with wildcard masks that match entire classful networks, match subnets, and match individual IP addresses. Use...
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L2 EtherChannel 1
#EtherChannel takes a big step towards improving STP. With two links between switches, but without using EtherChannel, each instance of STP could use only one of the links blocking the other link. With...
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