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May 6, 2013  4:59 AM

How to preserve encapsulation across SPAN?



Posted by: Yasir Irfan
Cisco, Cisco Certifications, Cisco Systems, Cisco Tips, Network Technologies and Trends, Networking, Switches

While any one of you are trying to analyze a SPAN or RSPAN traffic you may notice that certain layer 2 frames are missing. Usually SPAN/RSPAN ignores layer 2 traffic like CDP, spanning-tree BPUDs, VTP, DTP and PagP frames.  However, these traffic types can be forwarded along with the normal SPAN...

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August 14, 2012  7:09 AM

How to enable special http inspection for Cisco ASA firewall



Posted by: Yasir Irfan
Cisco, Cisco Systems, Cisco Tips, Network Technologies and Trends, Networking

  We had a special request from one of our clinicians; he was trying to access one of the health care portal with the URL http://apps.xxx.xx.sa:2000/. While he was trying to access the same portal from his office it was not accessible, whereas...

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July 6, 2011  10:07 AM

The layer 3 link between Nexus 7010 and Cisco 6506 E Switches is frequently going down part 2



Posted by: Yasir Irfan
62.5/125 microns, Cisco Catalyst 6506 E Switches, Cisco Nexus 7010 Series Switch, Cisco Switches, Cisco Tips, Cisco X2-10GB-LX4, Cisco X2-10GB-SR Module, Fiber optic cable, fiber patch cord, multimode fiber optic cable, Network Technologies and Trends, Nexus 7000 troubleshooting, Nexus 7010, operational Receive Flow Contol state changed to off, operational speed changed to 10 Gbps 2011 Jun 12 09:05:49 VDC-Admin-CO01-, operational Transmit Flow Contol state changed to off, physical media, VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/17 is down (Link failure), VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/17, VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/17, VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-IF_UP: Interface Ethernet1/17 is up in Layer3, VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-SPEED: Interface Ethernet1/17, wavelength

June 13, 2011  5:12 AM

The layer 3 link between Nexus 7010 and Cisco 6506 E Switches is frequently going down.



Posted by: Yasir Irfan
Cisco Catalyst 6506 E Switches, Cisco Nexus 7010 Series Switch, Cisco Switches, Cisco Tips, fiber patch cord, Network Technologies and Trends, Nexus 7000 troubleshooting, Nexus 7010, operational Receive Flow Contol state changed to off, operational speed changed to 10 Gbps 2011 Jun 12 09:05:49 VDC-Admin-CO01-, operational Transmit Flow Contol state changed to off, The layer 3 link between Nexus 7010 and Cisco 6506 E Switches is frequently going down., VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/17 is down (Link failure), VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/17, VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/17, VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-IF_UP: Interface Ethernet1/17 is up in Layer3, VDC-Admin-CO01-MB-1256-001 %ETHPORT-5-SPEED: Interface Ethernet1/17

We have Cisco Nexus 7010 working as a Core and Aggregation Switch. We have created two VDC one for Core and other one for Aggregation. One of Cisco 6506 E Switches connected as a distribution switch from Nexus 7010 Core Switch. Things were normal since its installation, suddenly one night we...

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May 28, 2011  5:12 AM

Cisco Catalyst 6500 Series Switches supports next-generation medianet, Cisco EnergyWise, TrustSec, and Borderless Mobility.



Posted by: Yasir Irfan
12.2(33)SXI4, A-VPLS, Advanced Virtual Private LAN Services, Borderless Mobility, Cisco Catalyst 6500 Series Switches, Cisco Catalyst Switches, Cisco EnergyWise, Cisco IOS, Cisco IOS Software Release 12.2(33)SXI4, Cisco News, Cisco Tips, Data Center Interconnect, medianet, MSR, Multicast Service Reflection, Network technologies & trends, SAF, Service Advertisement Framework, TrustSec, VSS Quad-Sup

The newly released Cisco IOS Software Release 12.2(33) SXI4 brings groundbreaking Borderless Networks innovations to Cisco Catalyst 6500 Series Switches. With more than 50...

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March 23, 2011  6:13 AM

Telnet by default disabled in NX-OS devices



Posted by: Yasir Irfan
Cisco Command, Cisco IOS Commands, Cisco Switch tips, Cisco Tips, configuring Cisco Nexus 7000 Switch, domain name, how to enable the Telnet Server in NX-OS devices, IP Address, Network technologies & trends, Nexus 5000 and 2000 Series Switches, Nexus 7000, Nexus configuration, Nexus configuration tips, Nexus tips, NX-OS, remote device address, TCP/IP connections, Telnet

  As I am working with Nexus 7000, Nexus 5000 and 2000 Series Switches, I discovered by default  Telnet Server is disabled in a NX-OS devices such as Nexus 7000, Nexus 5000 and 2000 Series Switches. We all know Telnet protocol enables TCP/IP connections to a host. Telnet allows a user at...

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February 27, 2011  6:12 AM

“Default interface” a very useful Cisco IOS command



Posted by: Yasir Irfan
Cisco 3550, Cisco Catalyst 3500 Series Switch, Cisco Catalyst Switch, Cisco configuration tips, Cisco Switch configuration, Cisco Switches, Cisco Switches tips, Cisco Tips, default interface, Network technologies & trends

  When we are configuring Cisco Switches and Cisco routers, sometimes we need to set the interface to default settings. Using the "default interface" configuration command we can achieve the result. This command is very handy and can be used on any Cisco Router or a Cisco Switch. In the...

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September 25, 2010  5:07 AM

“Show mac address-table count” a useful Cisco IOS command



Posted by: Yasir Irfan
CAM Table, CCNP SWITCH 642-813, Cisco Catalyst Switch, Cisco IOS command, Cisco Switch tips, Cisco Switches tips, Cisco Tips, Command, hosts, mac address, Network, Show mac address-table count, troubleshooting, VLAN

Suppose you want figure out total number of active MAC Address for each VLAN in Cisco Catalyst Switch, you can figure it out by using a command "Show mac address-table count".  This command can...

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July 31, 2010  7:49 AM

How to use a Cisco Router or a Cisco Switch to decrypt the encrypted passwords (type 7 passwords) – Video



Posted by: Yasir Irfan
Cisco networking tips, Cisco Router tips, Cisco Routers, Cisco Switch tips, Cisco Switches, Cisco Tips, Cisco troubleshooting tips, encrypted type 7 passwords, How to decrypt a password in Cisco router, How to decrypt a password in Cisco switch, How to use a Cisco Router or a Cisco Switch to decrypt the encrypted passwords, key chain, Key Chain password decryption in Cisco Router, Network Technologies and Trends

In

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July 28, 2010  5:42 AM

How to use a Cisco Router or a Cisco Switch to decrypt the encrypted passwords (type 7 passwords)



Posted by: Yasir Irfan
Cisco networking tips, Cisco Router tips, Cisco Routers, Cisco Switch tips, Cisco Switches, Cisco Tips, Cisco troubleshooting tips, encrypted type 7 passwords, How to decrypt a password in Cisco router, How to decrypt a password in Cisco switch, How to use a Cisco Router or a Cisco Switch to decrypt the encrypted passwords, key chain, Network Technologies and Trends

Normally we use any of decrypting software’s...

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