Network technologies and trends:

November, 2008


November 29, 2008  12:51 PM

Networking Professionals good news from Cisco to recertify your Cisco Certifications



Posted by: Yasir Irfan
CCDA, CCDE, CCIE, CCNA, CCNA Security, CCNA Voice, CCNA Wireless, CCNP, Certifications, Cisco, Cisco Certifications, Cisco Learning, Cisco News, Cisco Systems, Recertify

Cisco has extended the recertification for the networking professionals whose certifications are lapsing soon. With this special offer you start recertifying by taking an exam at the regular prick and if you don’t succeed in your first attempt no need to panic ,...

November 29, 2008  5:56 AM

Cisco announces Winners of the Digital Cribs Video Contest for Aspiring Filmmakers



Posted by: Yasir Irfan
Cisco, Cisco Contest, Digital Cribs

Dear Friends As we all aware Cisco conducted a digital crib contest and now the much awaited results are announced and the Winners are


November 26, 2008  5:59 AM

What is Dynamic ARP Inspection (DAI) ?



Posted by: Yasir Irfan
ARP, Cisco, Cisco Learning, Cisco Tips, DAI, DHCP, DHCP Snooping, Dynamic ARP Inspection, IP to MAC, Network Security, Security Features, Switches, Switching

Dynamic ARP inspection is a security feature which validates ARP packet in a network. Dynamic ARP inspections validates the packet by performing IP to MAC address binding inspection stored in a trusted database (the DHCP snooping database) before forwarding the packet....


November 22, 2008  12:56 PM

How to configure DHCP Snooping in a Cisco Catalyst Switches.



Posted by: Yasir Irfan
802.1 Q, CCNP, Cisco, Cisco 2950, Cisco 2960, Cisco 3560, Cisco 3560-E, Cisco 3750-E, Cisco 6500, Cisco 6500 Series Catalyst Switch, Cisco 6503, Cisco Catalyst 6503-E Switch, Cisco Catalyst 6506-E Switch, Cisco Catalyst 6509-E Switch, Cisco Catalyst 6509-V-E Switch, Cisco Catalyst 6513 Switch, Cisco IOS, Cisco Learning, Cisco Systems, Cisco Tips, Configuring DHCP Snooping, DHCP, DHCP Snooping, HSRP, IOS commands, Networking, Routing and Switching, Server Security, Switches, Switching, Trunk Ports

 So here we go, with the configuration of DHCP snooping on a Cisco Switch. This feature protects the network by allowing the Cisco Switches to accept DHCP response message only from the authorized servers connected to the trusted interfaces in a Cisco...


November 22, 2008  7:22 AM

Why should we consider implementing DHCP Snooping?



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 2960, Cisco 3560, Cisco 3560-E, Cisco 3750-E, Cisco 6500, Cisco 6500 Series Catalyst Switch, Cisco 6503, Cisco Systems, Cisco Tips, DHCP, DHCP Snooping, Err-disable, Networking, Security, Switches, Switching

Dear FriendsIn my previous post I was discussing about the


November 20, 2008  7:54 AM

What is Dynamic Host Configuration Protocol (DHCP) Snooping?



Posted by: Yasir Irfan
Cisco, Cisco 2960, Cisco 3560, Cisco 3745, Cisco 6500, Cisco 6500 Series Catalyst Switch, Cisco 6503, Cisco Catalyst 6503-E Switch, Cisco Catalyst 6506-E Switch, Cisco Catalyst 6509-E Switch, Cisco Catalyst 6509-V-E Switch, Cisco Catalyst 6513 Switch, Cisco Systems, Cisco Tips, DHCP, DHCP Snooping, Network Security, Security, Switches, Switching

Dynamic Host Configuration Protocol (DHCP) Snooping is a security feature which filters untrusted DHCP messages, this security feature can protects the devices on the network from associating with an unauthorized DHCP server. When the Dynamic Host Configuration Protocol...


November 17, 2008  5:16 AM

In which slot shall we install the Supervisor Engine in Cisco 6500 Series Catalyst Switches -Series2



Posted by: Yasir Irfan
Cisco, Cisco 6500, Cisco 6500 Series Catalyst Switch, Cisco Catalyst 6506-E Switch, Cisco Systems, Cisco Tips, Network Troubleshooting, Routing and Switching, SUP720, Supervisor Engine, Switches, Switching

Dear Friends in one of my previous post


November 12, 2008  12:56 PM

Solution for %IP-4-DUPADDR: Duplicate address error log in your Cisco 6500 Switches running HSRP



Posted by: Yasir Irfan
Cisco, Cisco 6500, Cisco 6500 Series Catalyst Switch, Cisco Catalyst 6513 Switch, Cisco IOS, Cisco Learning, Cisco Support, Cisco Systems, Cisco Tips, Hot Standby Router Protocol, HSRP, Network Troubleshooting, Routing and Switching, Switches, Switching, TAC, WebEx

Dear Friends In


November 12, 2008  5:27 AM

Cisco IT Security Forum: An Interactive Online Conference



Posted by: Yasir Irfan
Cisco, Cisco Events, Cisco Learning, Cisco News, IT Security, On Line Conference

Dear Friends  IT Security

Today at...


November 12, 2008  5:18 AM

Cisco Gifts Mega Router – Cisco Aggregation Services Router 9000 (ASR 9000)



Posted by: Yasir Irfan
Aggregation Services Router, ASR 9000, Cisco News, Mega Router, Routers, Routing

Today, Cisco announced a little something to help clear the way. The world's largest maker of networking equipment unveiled a new member to its growing family of routers custom-made for the Information Age. Known as the

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