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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 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 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 8, 2008  5:25 AM

CCNA Certification/Popular TCP/IP Applications port numbers



Posted by: Yasir Irfan
CCNA, Certifications, Cisco, Cisco Certifications, Cisco Learning, Cisco Tips, TCP/IP, TCP/IP Well known ports, UDP

Dear Friends  if you are preparing for

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October 20, 2008  5:06 AM

How to configure SNMPv3 in a Cisco Catalyst Switch – Series 2



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 2960, Cisco 3560, Cisco 6500, Cisco IOS, Cisco Learning, Cisco Systems, Cisco Tips, SNMP, SNMPv3, Switches

In the first series we just started to know about


October 12, 2008  5:17 AM

How to configure SNMPv3 in a Cisco Catalyst Switch – Series 1



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 3560, Cisco 3560-E, Cisco 3745, Cisco 6500, Cisco IOS, Cisco Learning, Cisco Tips, IOS commands, RFC3410, Security, SNMP, SNMP Version 3, SNMPv3, Switches

Configuring SNMP Version 3 in a


October 3, 2008  11:04 AM

CCDE Practical Beta Exam Available



Posted by: Yasir Irfan
CCDE, CCDE Beta, CCDE Exam, Cisco Design, Cisco Learning, Cisco News

Cisco has announced the availibity of beta version of CCDE Practical exam, Cisco will be offering this beta delivery of the exam on October, 1 in Chicago, Illinois USA - at a Pearson Professional Testing Center. Only candidates that have a passing score on the CCDE qualification exam may...


September 29, 2008  12:26 AM

Things to be considered before upgrading an IOS in a Cisco 6500 Series Switch with SUP720- Series 1



Posted by: Yasir Irfan
3Com TFTP, Cisco, Cisco 6500, Cisco IOS, Cisco Learning, Cisco Tips, DataCenter, IOS Upgrade, Network Troubleshooting, Networking, PacketTrap pt360, PacketTrap TFTP, SolarWinds, Switches, TFTP Server

Today I successfully upgraded the IOS for a Cisco Catalyst 6513 Switch with Supervisor Engine SUP720. Couple of years I faced some problems while I was upgrading the IOS for


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