Hello all ! hope everyone is doing good ! there are somethings to share .. first of all iam with various firms as a consultant and been doing some work in setting up their networks and the other way is iam working with a juniper systems elite partner ! .. juniper is not that hard or illogical per se and its good to have so many resources available in juniper site . iam a juniper certified sales associate for m/mx series router platforms now ! … does this mean iam off with ccie track ?
A big No .. i almost done with all sorts of my prep work and in final stages to launch the official labbing experience and scenarios .. i was not getting enough time to blog and keep you informed with my status updates !
ok … as iam done with most of my technologies .iam now going through INE extended blue print which is well written by Anthony Here is the link
http://blog.ine.com/2009/05/12/ccie-rs-4x-expanded-study-blueprint/
For next week i will be on Spanning tree from layer 2 and GRE tunnel and keep alive mechanisms from Layer 3 . just was going through a cisco doc on gre tunnel keep alive mechanism and was surprised as how Ethernet keepalives work
i will try to do a packet capture and see if that is how it works out … but to make it a soft finish let me brief you about what i read.. A detailed keepalive notes would be posted , this is just a what i have read about ethernet keepalives
ETHERNET KEEPALIVES
Generally keepalives are designed if the path to any particular neighbor is reachable and valid .. but on Ethernets it works in a different and strange way as there are many neighbors in a ethernet segment … A keepalive in this case of ethernet is designed such that local system has a read and write access to the ethernet segment itself ..
The Process
The router which for that matter any router local to itself produces a ethernet packet with source and destination mac addresses as itself and special ethernet code of 0×9000 .. as the packet reaches ethernet hardware , it immediately sends and receives the same packet which should confirm the whole purpose of keepailve mechanism ..
This is amazing for me as of now i dint knew this and as i have known if now i will try to lab it up and see if i can catch the same packet
Regards
Rakesh
