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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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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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EIGRP – Best Path Selection
By default EIGRP uses bandwidth and delay of the line to determine the best path to a remote network. However, if desired, EIGRP can use a composite of four metrics: bandwidth, delay, reliability, and load. Maximum transmission unit (MTU) is … Continue reading
Posted in Cisco, Labs, Networking, Protocols
Tagged bandwidth, Cisco, Cisco 3725, Cisco 3725 router, Cisco 3725 routers, delay, delay of the line, EIGRP, EIGRP calculation, eigrp load balancing, Enhanced Interior Gateway Routing Protocol, equal cost load balancing, load balancing, router, routing table, topology table
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Setting-up Basic iBGP and eBGP on Cisco Routers
The Border Gateway Protocol (BGP) is a protocol used to make core routing decisions on the Internet. BGP is commonly mislabeled or referred to as an IP routing protocol. However, it is not a routing protocol; rather, it is a … Continue reading
Posted in Cisco, Networking, Protocols, Technology
Tagged AS, Autonomous Number, Autonomous Numbers, BGP, BGP table, Border Gateway Protocol, Cisco, Cisco 3725, Cisco 3725 router, eBGP, established, established state, External BGP, iBGP, Internal BGP, Multihomed, neighbor, neighbor relationship, Neighbors, ping, prefxes, redistribute connected, redistribute static, redistribution of static and connected routes into BGP, show ip bgp, show ip bgp summary, state
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EIGRP and OSPF Redistribution on Cisco Routers
This was a quick lab I threw together which I thought was pretty cool. In this lab I use five Cisco 3725 routers [IOS 12.4(15)T10] in which I have two groups of routers each on a different subnet and running … Continue reading
Posted in Cisco, Labs, Networking, Protocols, Technology
Tagged Cisco, Cisco 3725, Cisco 3725 router, cisco router, EIGRP and OSPF Redistribution, EIGRP Redistribution, EIRGP, OSPF, Redistribution, router
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Setup and Troubleshoot EIGRP
I discussed Enhanced Interior Gateway Routing Protocol (EIGRP) briefly in a prior blog, Load Balancing with EIGRP, however, in this lab I use two Cisco 3725 routers [IOS 12.4(15)T10] to demonstrate how to configure EIGRP; additionally, I’ll discuss some useful … Continue reading
Configuring PVST+ on Cisco Switches
Per VLAN Spanning Tree Plus (PVST+) is a flavor of Spanning Tree Protocol (see prior blog, Default STP Behavior on Cisco Switches) which maintains a spanning tree instance for each VLAN in the network. This means certain VLAN trunks (using … Continue reading
Posted in Cisco, Labs, Networking, Protocols, Technology
Tagged avoid loop, Cisco, Cisco 3560, Cisco 3560 switch, Cisco switch, dot1q, loop, Per VLAN Spanning Tree Plus, prevent loop, PVST+, Spanning Tree Protocol, STP, switch, vlan
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