Convert IPv4 address to Dotted Binary Notation. Multicast IP Address to MAC address mapping.
Join our Discord server and chat with your fellow code warriors. The main use of NAT is to limit the number of public IP addresses an organization or company must use, for both economy and security purposes. 4) Convert the first octet from hexadecimal to binary: de -> 11011110. 3) Reformat to IPv6 notation dead:beff:feef:ed00. 2) Throw ff:fe in the middle: de:ad:be:ff:fe:ef:ed:00. An enhancement to the uuid program might be to provide an option to display times according to the local timezone when decoding - but either way, that info doesn't get stored inside the UUID itself. Achieve honor and move up the global leaderboards. Convertion process: 1) Take the mac address: for example de:ad:be:ef:ed:00. The time information in the UUID is stored as UTC time, and so that's how uuid -d displays it. You can find the global unicast addresses as well as the link-local address assigned to.
In the given example is a sample of the show ipv6 interface brief command. The show command is the relevant way to view the result. Regarding timezone: the UUID doesn't store the timezone. Example Configuring a EUI-64 IPv6 Address: R3 (config) int fa0/1 R3 (config-if) ipv6 address 2001:1234:AD:5555::/64 eui-64. It should use the MAC address of the hardware interface corresponding to the current default route, and let the user specify an alternate interface if desired. I would consider this a bug in the software. If your network interface is called eth1 or wlan0 or anything else, it fails to find it. Quite simply, this mechanism takes the 48-bit Media Access Control (MAC) address of the interface - which can normally be assumed to be globally unique - and converts it into a 64-bit Interface ID by inserting a reserved 16-bit value of 0xFFFE into the middle of the MAC address and 'flipping' the Universal/Local (U/L) bit of the MAC address to 1. To disable the switch from sending MAC address notification traps, use the no snmp-server enable traps mac-notification global configuration command. (Optional) Save your entries in the configuration file. Step 10 copy running-config startup-config.
It's looking for the MAC address of the eth0 interface, and silently falling back to a randomly-generated local multicast address if it can't find it. Step 9 show mac-address-table notification interface show running-config. The mac_address function in uuid_mac.c has this block of code: if ((s = socket(PF_INET, SOCK_DGRAM, 0)) < 0) The reason it's not using your actual MAC address is because the code is poorly written.