Hi, IP header has two fields IHL and Total length. Below is the reason I found for having both these fields instead of one. "The Total Length field is required in the header because some lower-layer protocols that carry IPv4 datagrams do not(accura...
Hi, Just having AGGREGATOR attribute is not enough? If a prefix has this attribute, that means it is aggregated. Why to have another special attribute ATOMIC_AGGREGATOR just to tell this is an aggregator route? Thx
Hi,
OSPF options are carried in all types of ospf packets like hello,Database Description and LS-Update. What is the need for carrying this in all the above? Isnt it duplicate?
Thanks
Hi,
I tried searching the internet but did not find any relevant discussion. Anyone know why BDR is elected first and then it is promoted as DR? DR can be elected first and then BDR na?
Thanks
Hi Giuseppe.. Let us assume IHL is 5 which means 20 bytes, whereas Total length is 120 bytes. From IHL, we can find out where IP header ends ie starting from 1st byte of IP header to 20th byte. Where do you use Total Length here. why do you need to w...
Let me elaborate this question. Let us assume there are 2 cases. 1. a peer received route with just aggregator attribute 2. a peer received with both aggregator and atomic_aggregator attribute. Why doesnt bgp implementation consider the route is aggr...
Hi, Thanks for your time. I am copying the LS-Update and DatabaseDescription packets I captured from my switch. You can see the options inthe highlighted.06:41:05.052355 00:1c:73:3c:e3:79 > 01:00:5e:00:00:05, ethertype IPv4(0x0800), length 110: (to...
Hi...ospf does not do load balancing across multiple areas. I have notconfigured anything, I read this sometime. Just curious, what was thereason for not doing ecmp across areas?
