01-24-2014 11:33 AM - edited 03-04-2019 10:09 PM
I have read another thread and has a little confusion about the 3rd point below?
--------------------------------------------------------------------------
---------------------------------------------------------------------------------------
3.) The original router receives the same update from the DR it sent it a moment ago, and it considers it as an implicit acknowledgement. No further LSAck from the DR is expected.
Question
##########
Does the original router which recieves it own update packet needs to send an explicit ack to DR. To notify DR that it has recieved the update ?
I think the original router will not notify DR with an LSAck if it receive the implicit ack. Can someone confirm it?
Regards,
Qixin
Solved! Go to Solution.
01-24-2014 05:06 PM
Hi Qixin,
I think the original router will not notify DR with an LSAck if it receive the implicit ack. Can someone confirm it?
You are right. Table 19 in RFC2328 talks about the same.
Circumstances Backup All other states _________________________________________________________________________________ LSA is a Delayed acknowledg- No acknowledgment duplicate, and was ment sent if adver- sent. treated as an im- tisement received plied acknowledg- from Designated ment (see Section Router, otherwise 13, step 7a). do nothing
HTH,
Nagendra
01-24-2014 05:06 PM
Hi Qixin,
I think the original router will not notify DR with an LSAck if it receive the implicit ack. Can someone confirm it?
You are right. Table 19 in RFC2328 talks about the same.
Circumstances Backup All other states _________________________________________________________________________________ LSA is a Delayed acknowledg- No acknowledgment duplicate, and was ment sent if adver- sent. treated as an im- tisement received plied acknowledg- from Designated ment (see Section Router, otherwise 13, step 7a). do nothing
HTH,
Nagendra
01-24-2014 05:43 PM
Hi Nagendra,
Thanks for the response, I noticed the table too and need someone confirm it. However, if the original router doesn't notify DR with an LSAck, the question will be "will DR expect to receive LSAck after it send LSU to 224.0.0.5?". Look like all the DRother routers except the original one will send the LSAck back to DR, I am really cruious what is the expected behavior on DR's perspective. Can someone explain it?
01-24-2014 05:56 PM
Hi Qixin,
This is the expected behaviour. DR will not expect any ack from the original router.
-Nagendra
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide