How tos

Update IOS XE

Install mode is the recommended mode for booting a switch. This is due to the fact that bundle mode requires more memory, is slower to boot, and auto-upgrade for example isn’t supported in bundle mode. Bundle mode is the legacy way of booting a switch using a .bin file which is referenced directly in the boot system command. Install mode on the other hand expands (extracts) the bin file to flash ahead of booting.

VMware Goodies

CDP Configuring View CDP information CLI Change hostname CDP Configuring First verify how CDP is configured: # esxcfg-vswitch -b vSwitch1 If you want to enable sending of CDP: # esxcfg-vswitch -B vSwitch1 View CDP information CLI # vim-cmd hostsvc/net/query_networkhint   Change hostname Networking -> TCP/IP Stacks -> Default TCP/IP Stack -> Edit Settings  

Create Large Files

OS X Windows Linux -- OS X mkfile 1024m ~/Desktop/1Gfile Windows fsutil file createnew c:\1Gfile 1073741824 Linux Or OSX dd if=/dev/zero of=~/1Gfile count=1024 bs=1048576

VMware upgrade – CLI

You can check the version you have installed using: esxcli system version get The output of this command is something like this: Prior to the upgrade you must ensure that outbound http connections are allowed by the firewall. Use this to allow it: esxcli network firewall ruleset set -e true -r httpClient To upgrade your install: esxcli software vib update -d It will take a while. When done, reboot and verify the upgrade.

Ping With Timestamp

ping -i 0.5 | while read ping_output; do echo "$(date): $ping_output"; done