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Category Archives: Protocols
Gratuitous ARP and Basics of Connecting a Cisco IOS Switch with a Cisco CatOS Switch
Some of you may have an old Cisco Catalyst switch laying around that you may want to put to use. CatOS is the old Cisco operating system for Catalyst switches that predates IOS; it can still be found on some … Continue reading
Posted in Cisco, Labs, Networking, Protocols, Technology
Tagged 1000Base-SX, 1000Base-SX GBI, CAM, Catalyst 3548-XL, Catalyst 3550, Catalyst 4003, Catalyst C4000, Catalyst C4003, CatOS, Cisco, Cisco 1000Base-SX, Cisco 1000Base-SX GBIC, Cisco Catalyst, Cisco Catalyst 3548-XL, Cisco Catalyst 3550, Cisco Catalyst 4000, Cisco Catalyst 4003, Cisco Catalyst C4003, Cisco CatOS, Cisco GBIC, Cisco IOS, Cisco WS-X4012, Cisco WS-X4232-GB-RJ, Cisco WS-X4232-L3, delete configuration, Dell, Dell EqualLogic, Dell EqualLogic storage, EqualLogic, erase configuration, GBIC, Gratuitous ARP, ios, IXIA, MAC address, MAC address table, reset configuration, Supervisor Engine, Supervisor Engine 1, Supervisor Engine 2, Supervisor Engine I, Supervisor Engine II, Windows PC, wireshark, WS-C3548-XL-EN, WS-X4012, WS-X4232-GB-RJ, WS-X4232-L3
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Multi-Area OSPF – Redundancy, Route Summarization, and LSA Filtering
In this lab, all routers except for R4 and R5 are Cisco 3725 routers [IOS 12.4(15)T10]. Routers R4 and R5 are Cisco 7200 routers [IOS 12.4(24)T]. Below is the network diagram for this lab.
Posted in Cisco, Labs, Networking, Protocols, Technology
Tagged ABR, Area Border Router, Cisco, Cisco 3725, Cisco 3725 router, Cisco 7200, Cisco 7200 router, Multi-Area OSPF, networking, Open Shortest Path First, OSPF, OSPF ABR, OSPF Area Border Router, OSPF redundancy, OSPF summary route, redundancy, summary route
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802.1Q Trunking Between Cisco and Dell Force10 Switches
In this lab I use a Dell Force10 S25P switch [FTOS 8.4.2.6] and a Cisco C3750 switch [IOS 12.2(25)SEE3] to demonstrate 802.1Q trunking.
Posted in Cisco, Dell Force10, Force10 Networks, Labs, Networking, Protocols, Technology
Tagged 802.1q, 802.1Q encapsulation, 802.1Q trunk, 802.1Q trunking, change default vlan, change native vlan, Cisco, Cisco C3750, default vlan, Dell Force10, Dell Force10 S25P, dot1q, etherchannel, Force10, hybrid, hybrid port, IEEE 802.1Q, Inter-Switch Link, isl, native, trunk, trunk encapsulation, Trunking, vlan, vlans, Voice over Internet Protocol, VOIP
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EIGRP – Advertising a Default Route to Neighbors
In this lab I use five Cisco 7200 routers [IOS 12.4(24)T] to demonstrate how to advertise a default route to neighbors in EIGRP. Below is the network diagram for this lab.
Configuring eBGP Peers to Use a Loopback Interface
In this lab, I use two Cisco 3725 routers [IOS 12.4(15)T10] to configure eBGP peers using loopback interfaces. Below is the network diagram for this lab.
Posted in Cisco, Labs, Networking, Protocols, Technology
Tagged BGP, BGP neighbor, BGP neighbors, BGP peers, Border Gateway Protocol, Cisco, Cisco 3725, Cisco 3725 router, cisco router, Configuring BGP, eBGP, eBGP peers, peers
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Configuring OSPF with Multiple Areas
In this lab, I use three Cisco 3725 routers [IOS 12.4(15)T10] to demonstrate how to setup OSPF with multiple Areas. Below is the network diagram for this lab.
Posted in Cisco, Labs, Networking, Protocols, Technology, Troubleshooting
Tagged Area, Areas, Cisco, Cisco 3725, Cisco 3725 router, Multiple Areas, Multiple OSPF Areas, OSPF, OSPF area, OSPF Areas, router
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Important IPv6 Addresses
For easy reference, I’ve listed some important IPv6 address ranges below.
Networking: Spanning Tree Protocol Basics [Video]
This video covers some of the basics of how Spanning Tree Protocol (STP) works in a network. To learn more about Spanning Tree Protocol see some of my prior blogs on STP.
Posted in Networking, Protocols, Technology
Tagged Loop Avoidance, loop prevention, network loops, Spanning Tree Protocol, STP
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