Network technologies and trends:

Network Troubleshooting


March 12, 2011  6:18 AM

CCNP – Switch Key Topics 1 – Spanning tree loop guard



Posted by: Yasir Irfan
BCMSN exam, BCMSN exam (642-812), BPDUs, CCNP, CCNP Switch, CCNP SWITCH 642-813, Cisco Certifications, global configuration mode, Implementing Cisco IP Switched Network, IOS command, Network Troubleshooting, non-Designated Port, point-to-point, Spanning tree loop guard, spanning tree protocol loops, spanning-tree loopguard default, STP loop-inconsistent Blocking state, STP loops, Switching, UDLD, UDLD feature

  When you are preparing for the CCNP Switch (642-813) or BCMSN exam (642-812) there are quite a few topics which are important not only from the perspective of passing  the  "Implementing Cisco IP Switched Network" exam or...

January 20, 2010  7:29 AM

Disable Cisco Discovery Protocol on unused interfaces



Posted by: Yasir Irfan
CDP, Cisco Discovery Protocol, Cisco Router tips, Cisco routers. Disable cdp, Cisco Switches, Cisco Switches tips, Cisco Tips, Network technologies & trends, Network Tips, Network Troubleshooting, no cdp enable, show cdp interfaces, show cdp neighbors


December 9, 2009  9:19 AM

How to detect a rouge DHCP server in your network?



Posted by: Yasir Irfan
address resolution protocol, Cisco 3560 Switch, Cisco IOS Switch, Cisco Tips, command prompt, computer, configure DHCP snooping, Detecting Rouge DCHP server, DHCP Server, DHCP Snooping, How to detect a rouge DHCP server in your network, Internet Address, mac address, Network Tips, Network Troubleshooting, PC, Physical Address, rouge, rouge DHCP server, Show mac-address table, shutdown, Virtual PC, Windows 2003 Server

 

Today morning I was late to arrive at my office due to some problems, when I came I saw my colleagues were trying hard to figure out the...


September 8, 2009  9:45 AM

Remote Telnet useful tips!



Posted by: Yasir Irfan
Cisco, Cisco 3560, Cisco Learning, Cisco Routers, Cisco Switch, Cisco Tips, Cisco Troubleshooting, IOS commands, Network Troubleshooting, reload, Router Troubleshooting, SSH, Switches, Telnet

 

We all work remotely with Cisco routers and Switches, we often do login to do some configuration changes in the Cisco routers and...


July 27, 2009  5:55 AM

Reset Cisco 1250 Access Point to factory default settings



Posted by: Yasir Irfan
Access Point, Access Point troubleshooting, Cisco, Cisco Access Point reset, Cisco Access Points, Cisco Aironet 1250, Cisco Aironet 1250 Access Point, Cisco Commands, Cisco Tips, default settings, factory default settings, Network Troubleshooting, Static IP, troubleshooting, web browser interface, Wireless, write erase

 

If you want to reset the   Bookmark and Share     0 Comments     RSS Feed     Email a friend


July 22, 2009  6:13 AM

Review for CCNA 640-802 Network Simulator



Posted by: Yasir Irfan
640-802 CCNA Exam, CCENT, CCNA, CCNA 640-802, CCNA 640-802 Network Simulator, CCNA ICND2 640-816, CCNA Labs, CCNA Network Simulator, CENT, Cisco Certifications, Cisco Learning, Cisco Press, ICDN1, ICDN2, IP addressing, IP Routing, LAN Switching, Network Troubleshooting, Pearson Education, Real Network, Review for CCNA Network Simulator, software, STP, Switch Navigation, Switching, VLANS, WAN

 

If you are preparing for the


December 2, 2008  7:30 AM

How to configure SPAN(Switched Port Analyzer ) feature in a Cisco Catalyst Switch



Posted by: Yasir Irfan
Cisco, Cisco 2950, Cisco 2960, Cisco 3560, Cisco 3560-E, Cisco 3745, 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 Tips, Network Troubleshooting, Show commands, Sniifer, SPAN, Switches, Switching, Wireshark

It’s quite important for Network Engineers and an essential network troubleshooting technique to utilize the ability of Cisco Catalyst Switches


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 9, 2008  6:51 AM

Don’t panic whenever you see %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 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, Hot Standby Router Protocol, HSRP, Network Troubleshooting, Networking, Routing and Switching, Switches, Switching, Trojan

If you are running HSRP and one of your VLAN is down and the following errors are generated in your Switch don’t panic. All this happens due the Trojans in the network.

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