Cisco Catalyst 9300 ios upgrade

  1. Remove Unwanted Packages
    install remove inactive
  2. Copy New Image to Flash
    copy usbflash0:/cat9k_iosxe.x.x.x.SPA.bin flash:/
  3. Set Boot Variable
    (config) boot system flash:packages.conf
    wr
    show boot system
  4. Software Install Image to Flash
    install add file flash:cat9k_iosxe.x.x.x.SPA.bin activate commit
  5. Verify New Packages and Image after reload
    dir flash:*.pkg
  6. Check Version and New Bootloader
    show version
  7. Clean up
    install remove inactive

UTF encoding

Code point range UTF-8 UTF-16
hexadecimal binary Bytes
(code bits)
binary hexadecimal Bytes
(code bits)
binary hexadecimal
00 00 00
00 00 7F
0000 0000 0000 0000 0000 0000
0000 0000 0000 0000 0111 1111
1
(7)
0xxx xxxx 00
7F
2
(16)
xxxx xxxx xxxx xxxx 00 00
FF FF
00 00 80
00 07 FF
0000 0000 0000 0000 1000 0000
0000 0000 0000 0111 1111 1111
2
(11)
110x xxxx
10xx xxxx
C2 80
DF BF
00 08 00
00 FF FF
0000 0000 0000 1000 0000 0000
0000 0000 1111 1111 1111 1111
3
(16)
1110 xxxx
10xx xxxx
10xx xxxx
E0 A0 80
EF BF BF
01 00 00
10 FF FF
0000 0001 0000 0000 0000 0000
0001 0000 1111 1111 1111 1111
4
(21)
1111 0xxx
10xx xxxx
10xx xxxx
10xx xxxx
F0 90 80 80
F4 8F BF BF
4
(20)
1101 10xx xxxx xxxx
1101 11xx xxxx xxxx
D8 00 DC 00
DB FF DF FF

ESXi Raw Device Mapping RDM

To configure a local device as an RDM disk:

  1. Open an SSH session to the ESXi host.
  2. Run this command to list the disks that are attached to the ESXi host:
    ls -l /vmfs/devices/disks
  3. From the list, identify the local device you want to configure as an RDM and copy the device name.
    Note: The device name is likely be prefixed with t10. and look similar to: t10.F405E46494C4540046F455B64787D285941707D203F45765
  4. To configure the device as an RDM and output the RDM pointer file to your chosen destination, run this command:
    vmkfstools -z /vmfs/devices/disks/diskname /vmfs/volumes/datastorename/vmfolder/vmname.vmdk

For example:

vmkfstools -z /vmfs/devices/disks/t10.F405E46494C4540046F455B64787D285941707D203F45765 /vmfs/volumes/Datastore2/localrdm1/localrdm1.vmdk

https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1017530

Test Jumbo Frames / MTU 9000

Linux:

ping -M do -s 8972 xxx.xxx.xxx.xxx

OSX/BSD:

ping -D -s 8184 xxx.xxx.xxx.xxx

Windows:

ping -f -l 9000 xxx.xxx.xxx.xxx

Example results on Linux

If you’ve forgotten to enable jumbo frames/9k MTU on your client device you’re sending the ping from:

PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes
ping: sendto: Message too long

If you have enabled jumbo frames on your client but not the destination (or a switch in between):

PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes
Request timeout for icmp_seq 0

If you’ve done everything righ:

PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes
8192 bytes from xxx.xxx.xxx.xxx: icmp_seq=0 ttl=128 time=0.714 ms