Cisco Catalyst – ‘Daughtercard inserted in this switch may not have been manufactured by Cisco’
KB ID 0001018 Problem In a newly deployed switch, the MACSEC link refused to establish, when I consoled in I was greeted with this; Dec 06 01:30:07.023: %ILET-1-DEVICE_AUTHENTICATION_FAIL: The FRULink SM Daughtercard inserted in this switch may not have been manufactured by Cisco or with Cisco’s authorization. If your use of this product is the cause of a support issue, Cisco may deny operation of the product, support under...
Cisco Catalyst – Find out What Port an IP Address is Plugged Into
KB ID 0001022 Problem I networked some gear this afternoon, and I made a mental note of the ports I patched into on the switch. On the way back to the office I got side-tracked. By the time I got back to my desk I could not remember what port I had used, and I wanted to add a description to the port. This is not my server room 🙂 So I knew the IP address but not the port number, how can you find that out? Solution 1. My IP address is...
Cisco Catalyst – Upgrading IOS (via USB)
KB ID 0001056 Problem Had a stack of 3560-X Switches to update today, and when I went looking for the notes I used last time, I could not find them. So This time I took the time to document the procedure. Solution Now I could load in the IOS image from TFTP like this, but last time I did this I used a spare USB drive and the image ‘tar’ file, and found it a lot less hassle. 1. Make sure you have formatted your dive at...
Cisco Catalyst – Configure Ports for VMware ESXi NICs using VLANS
KB ID 0001065 Problem If you don’t need different virtual machines to be in different VLANS on your vSphere/ESXi servers then you probably just connect everything together and it all works fine. I was trying to carve off some hosts into their own VLAN today, and setup a new vSwitch. or if you prefer to work in the fat client. Now you can see (above), I’ve presented one physical NIC to this vSwitch (vmnic1). This is...
Cisco Catalyst – %Error Deleting flash:/{name} (Is a directory)
KB ID 0001070 Problem Today I was upgrading a Cisco 3750 switch, and needed to free up some space in the flash memory to upload the new system image to. But when I tried to delete the current system file I got this error. Petes-3750# dir Directory of flash:/ 2 -rwx 796 Mar 7 1993 01:15:49 +00:00 vlan.dat 3 drwx 192 Mar 1 1993 00:17:13 +00:00 c3750-ipservicesk9-mz.122-55.SE5 4 -rwx 5504 May 27 2015 10:23:47 +00:00 private-config.text...
Connecting to and Configuring Cisco Routers with ‘Cisco Configuration Professional’
KB ID 0000512 Problem It’s not often I work on Cisco routers, but as I tend to do most of the Cisco ASA Firewalls, I’m the unofficial “Cisco Guy”. Which is fine until someone wants a router or some complex switching, then I need to do some heavy duty frowning. Last time I put in a Cisco router it was a baby Cisco 800 series (an 877W) so I assumed the 1921 ISR router I had to put in would be the same. Before I...
Cisco Routers – Port Forwarding
KB ID 0000533 Problem If you have a server or host that you want to be publicly addressable and only have one public IP address then port forwarding is what you require. Solution Assumptions 1. You have a public IP on the outside of your Router. 2. You are performing NAT from your internal range of IP address to your External IP address. To Make Sure 1. Run the following command: PetesRouter#show run | include ip nat inside You...
Cisco Router IOS – Configuring EIGRP
KB ID 0000929 Problem For the first time in about ten years I had to deal with EIGRP last week, so I thought I would run it up in a lab. Normally I would use GNS3 but for this procedure I’ll use Cisco Packet Tracer.</p< In fact I’ll include the files so you can download and use the lab yourself, (if you have a copy of Packet Tracer). And I’ll also include the configs for all the routers. In the lab I’ve...
Backup and Restore Cisco IOS (Switches and Routers)
KB ID 0000538 Problem It’s been a long time since I ran through setting up a TFTP server, but I still use 3CDeamon. Below I’ll run though the simple commands to back up, and restore the devices configuration. Solution Backing up a Cisco IOS Device 1. First you have to setup a TFTP server, and know the IP address of the machine it’s on! 2. Connect to the device, either via console cable, Telnet or SSH. 3. Log in >...
Cisco Router – Password Recovery /Bypass
KB ID 0000931 Problem If you have a Cisco router that you have forgotten the password for, or have been given one, or simply bought one from ebay, you may not know the password. In fact many years ago an ISP was going to charge me a ridiculas amount of money to put an entry in a routers routing table, this procedure ‘ahem’ would have allowed to to do it myself, for free, and then reload the router. Solution The reason you...