Week 3 Section Notes: ARP and Lab 3

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sr_arpcache●sr_arpcache.c has a function calledsr_arpcache_sweepreqs:●●●Called (roughly) every second.If you haven't received a response for your ARPrequest in more than a second, send another...Unless, you've requested 5 times. Then send anICMP error message to all sources.
sr_arpcache: Things you'll have todo.●●●●●Broadcast ARP requests.Write sr_arpcache_sweepreqs.Build a data structure tracking outstanding ARPrequests.Send ICMP error messages when can't findnext-hop router.Handle ARP responses.
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Week 3 Section Notes: ARP and Lab 3

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