wanted to make room for hello’s, dbd’s, lsr, lsu, lsa (acknowledgment
notice the bottom part of wireshark that’s highlighted. if you can interpret hex you’ll see the fields in the body correspond to the raw data below, ie, the mask field is 255.255.255.0 and is represented in hex by ff ff ff 00. the hello interval is ten seconds, or 0a, etc.
note mtu is highlighted.
remember with hex
multiples of 16 place|the 16’s place|units place
since there are 3 places you have left to right (the fourth on the left = 0):
0 + 5* 256 + d=13 *16 + c = 12
each corresponding place holder is multiplied by 16.
so the fourth place holder is 4096 or 16 times 256
more than that, get a calculator…
note here that three lsa types are represented, 1) router 3) summary and 4) asbr summary
this is a response to an LSR. it may contain multiple LSA’s as in the output.
multiple lsa’s may be acknowledged witjh a single ack