Author Archives: Humair

Advanced Private VLAN Configuration on Dell Force10 Switches

Posted on July 17, 2012 by Humair

In a prior lab, “Dell Force10 Z9000 – Creating Additional Layer 2 Isolation via Private VLANs“, I demonstrated some basics in regards to private VLANs. In this lab, I plan to go a little further and demonstrate how hosts in … Continue reading →

Posted in Dell Force10, Force10 Networks, Labs, Networking | Tagged Dell, Dell Force10, Dell Force10 S50V, Dell Force10 S60, Dell Force10 Z9000, Dell S50V, Dell Z9000, Force10, Force10 S50V, Force10 S60, Force10 Z9000, FTOS, private VLAN, private VLANs, private-vlan host, private-vlan trunk, PVLAN, PVLANs, S50V, S60, Z9000 | Leave a comment

Multi-Area OSPF – Redundancy, Route Summarization, and LSA Filtering

Posted on July 9, 2012 by Humair

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 | 1 Comment

Dell Force10 Z9000 – Creating Additional Layer 2 Isolation via Private VLANs

Posted on July 7, 2012 by Humair

Private VLANs provide additional segregation capabilities within a VLAN. A private VLAN provides further layer 2 isolation between ports. A common example of private VLAN use is a hotel providing Internet access for patrons while at the same time preventing … Continue reading →

Posted in Dell Force10, Force10 Networks, Labs, Networking, Technology | Tagged community VLAN, Dell, Dell Force10, Dell Force10 S50V, Dell Force10 Z9000, Force, Force10, host port, isolated VLAN, layer 2 isolation, primary VLAN, private VLAN, private VLANs, promiscuous port, S50V, secondary VLAN, vlan, vlans, Z9000 | 2 Comments

802.1Q Trunking Between Cisco and Dell Force10 Switches

Posted on July 2, 2012 by Humair

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 | 17 Comments

EIGRP – Advertising a Default Route to Neighbors

Posted on June 28, 2012 by Humair

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.

Posted in Cisco, Labs, Networking, Protocols, Technology | Tagged advertise a default route to EIGRP neighbors, advertise default route to neighbors, Cisco 7200, Cisco 7200 router, default route, default-network, EIGRP, Enhanced Interior Gateway Routing Protocol, ip default-network | Leave a comment

Configuring eBGP Peers to Use a Loopback Interface

Posted on June 13, 2012 by Humair

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 | 1 Comment

Configuring OSPF with Multiple Areas

Posted on June 1, 2012 by Humair

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 | Leave a comment

Important IPv6 Addresses

Posted on May 1, 2012 by Humair

For easy reference, I’ve listed some important IPv6 address ranges below.

Posted in Networking, Protocols, Technology | Tagged important ipv4 addresses, important ipv6 addresses, ip, ip address, IPv4, ipv4 ip address, IPv6, ipv6 ip address, networking, special ipv4 addresses, special ipv6 ip addresses | Leave a comment

Networking: Blocking Access to a Website via Extended Access List [Video]

Posted on April 16, 2012 by Humair

This video demonstrates how to use an extended access list to prevent specific hosts from accessing a website. In this lab I use two Cisco 2811 routers [IOS 12.4(15)T1] and two Cisco 2950-24 switches [IOS 12.1(22)EA4].

Posted in Cisco, Labs, Networking, Technology | Tagged ACL, Cisco 2811, Cisco 2811 router, Cisco 2950, Cisco 2950-24, Cisco 2950-24 switch, Cisco switch, extended access list, Extended ACL, prevent hosts from accessing a website, prevent specific hosts from accessing a website, router | Leave a comment

Networking: Spanning Tree Protocol Basics [Video]

Posted on April 15, 2012 by Humair

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 | 1 Comment