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showing posts tagged with 'networking'
 
Notes on using a QSA to convert QSFP(+) to SFP(+) on Dell switches
edited by on March 27th 2020, at 14:13
It is possible to convert a QSFP or QSFP+ port to an single SFP or SFP+ port using the Quad to Small Form Factor Pluggable Adapter (QSA). However, in order for this to work, you'll need to configure the QSFP+ port into break-out mode to 4x10Gbps, similar like you would when using actual QSFP to 4xSFP break-out cables.

For OS10, the CLI for this action is:

interface breakout 1/1/7 map 10g-4x

This will break out the interface 1/1/7/ to 4 10Gbps links, which translates to these interfaces on the switch: 1/1/7:1, 1/1/7:2, 1/1/7:3 and 1/1/7:4:

show interface status ------------------------------------------------------------------Port Description Status Spe  ...
 
Reset a HP 1810-24(G) to factory defaults
edited by on November 25th 2015, at 10:58

Resetting a HP 1810-24 or -24G to factory defaults is easy:

  1. With the switch powered on, using both ends of a paperclip (or two separate paperclips), press and hold down the Reset and Clear buttons.
  2. Release the Reset button, but keep the Clear button held down.
  3. When all three mode LEDs (Act, FDx, and Spd) begin to blink, release the Clear button as well. When the self-test completes, the switch will be reset to factory defaults. Its IP address will be obtained through DHCP, or if there's no DHCP, it will be set to 192.168.2.10. The password will be blank.
 
Disable the page prompt ("more") on Dell Networking/Force10 switches
edited by on April 20th 2015, at 15:41

You can disable the page prompt "--More or (q)uit--" by entering the following command at the console:

terminal length 0

This disables the prompt, and allows you to do config dumps, or run show tech-support.

If you get an error about unrecognized command, your firmware is too old.

 
A thing about Dell Networking "switchport general" mode
edited by on April 17th 2015, at 15:07

Dell Networking switches introduce a new port mode called switchport general. This type is a multi-purpose mode, combining access and trunk in one.

Access mode

The following gets written as:

switchport mode access
switchport access vlan 99
=
switchport mode general
switchport general allowed vlan add 99 untagged
switchport general pvid 99

Trunk mode

The following gets written as:

switchport mode trunk
switchport trunk allowed vlan add 99,100
=
switchport mode general
switchport general allowed vlan add 99,110 tagged
switchport general pvid 4095         (this is is the drop vlan)
 
 
Reset password on vMware appliances (VDP, VRA, etc.)
edited by on March 9th 2015, at 11:15
You can easily reset the root password on linux-based VMWare appliances through the boot loader. For this to work, you need access to the console of the appliance (i.e. through vSphere (Web) Client), and needs to be performed during offline hours as the appliance has to be rebooted.

Reboot the appliance, and as soon as you see the GRUB boot loader, halt the automatic boot timer by hitting any key (I usually move the selection using the arrows).

Select the first entry, and press e, allowing you to type in some text. At the end of the line that starts with kernel, add the following text:

init=/bin/bash

Do not remove any other text. Then press Enter to confirm.

Press b to continue the boot  ...
 
DynDNS.com on Sonicwall
edited by on February 3rd 2015, at 10:24

Last year, around May, DynDNS.com has changed their root certificates, causing Dynamic DNS using DynDNS.com no longer to work properly. The error (Network Error) is displayed immediately after adding the account to your Sonicwall.

The easiest solution is to upgrade to the latest firmware:

  • For 5.8, this is at least 5.8.4.0;
  • For 5.9, this is anything after June 2014.

Dell Support also offers an alternative, although this only works with more recent 5.9 versions:

https://support.software.dell.com/kb/sw11246

 
Firmware upgrade of Dell Force10 MXL IOM
edited by on October 13th 2014, at 12:46
Installing a firmware upgrade on your Dell Force10 MXL IOM works similar (but slightly differently) than the other Force10 series. There are two things to upgrade: the IOM firmware and IOM operating system. The first has to be upgraded through CMC (not documented here), the second through the switch itself.

To upgrade FTOS, you need console access (can be SSH/Telnet) to the switch and an SCP/FTP/TFTP server.

If you have none of these, you can download tftp32/64. This is a light-weight TFTP-server which does not need to be installed and can be run as an application on any networked computer. Place the downloaded firmware (the BIN-file) in the same location as the tftp32/64 executable and st  ...
 
 
showing posts tagged with 'networking'
 
 
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