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

[Hitesh Wadekar]

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.

Cheer,
Hitesh
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