[ndnSIM] Mechanism to check neighbor (link) alive or not

Lan Wang (lanwang) lanwang at memphis.edu
Wed Mar 4 08:37:47 PST 2015

Are you talking about the Hello messages (we call it INFO message in the paper)?  This is something NLSR sends, since it's used to detect whether NLSR is alive or not.  So you can't use something else to replace it.   For example, if there's link layer mechanism to detect link failures, that will help trigger routing calculations faster in this case.  But the link layer failure detection is not going to detect NLSR failure.

That said, NLSR does receive notifications from the local NFD when a face goes down or up.


On Mar 4, 2015, at 10:17 AM, Hitesh Wadekar <wadekahn at clarkson.EDU<mailto:wadekahn at clarkson.EDU>>

Hey Guys,

I just gone through NLSR paper, where they have mentioned that they are sending status (echo) messages to neighbor to check whether its alive or not (basically for tracking) which is a kind pf ping utility.

I wonder is there any other mechanism in NDN protocol stack that we can check or verify weather connected link or neighbor node is reachable or alive or not?

Thank you guys.


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