1 | initial version |
Frames 55, 56 and 57 are the same packet sent three times.
In the Frame Protocol Preferences, enable Generate an MD5 hash ...
to see that they all have a hash of 90cbc8f1b307827eea099e202cab6eaa
.
The router (or something on the other side of the router) would like to contact 138.37.73.45
which, assuming a subnet mask of /24
, puts it on the 138.37.73.0/24
subnet. The router makes an ARP Request to map the IP address 138.37.73.45
to a MAC address to communicate at layer 2. That device doesn't respond to the first ARP
, the router waits one second then asks again, waits another one second then asks the third (final) time.
ARP
Requests are sent to the Broadcast address ff:ff:ff:ff:ff:ff
.
The only frames for eth.addr == 84:2b:2b:ff:d8:c4
are the Multicast queries in frames 543 and 544.
IANA MAC ADDRESS BLOCK
IANA allocates addresses under the IANA OUI (00-00-5E) as explained in [RFC7042]. Unicast addresses under the IANA OUI start with 00-00-5E, while multicast addresses under the IANA OUI start with 01-00-5E. In the lists below, these initial 3 bytes are omitted for brevity. As described in [RFC7042], 48-bit MAC addresses in the range 33-33-00-00-00-00 to 33-33-FF-FF-FF-FF are used for IPv6 multicast.