7.3 Does the client have to reply to ICMP Echo Requests on all three interfaces or just on the primary interface?.7.2 What types of ICMP messages do I have to generate.7.1 If I generate an ICMP message, what is the right TTL to use?.6.3 WireShark reports that the ICMP checksums generated by the Unix ping application are wrong.6.2 How do I write and test a function that calculates the IP Checksum.6.1 Which types of checksums (TCP/UDP/ICMP/IP) do we have to verify/calculate?.5.4 Do I have to check/decrement the TTL in the IP header if the packet is addressed to me?.5.3 Do I have to be able to handle IP Options.5.2 How do I have to deal with fragmented packets?.5.1 Do I have to handle Muticast in my router?.4.5 How many ARP requests must I send to a host withouh a response before I send an ICMP host unreachable packet back to the sending host?.4.4 Why are the ARP packets I get from sr_send_packet(.4.3 How do we implement the arp queue timeout? Should we use multiple threads or a timer?.4.2 How do I implement the ARP cache? Is a static table sufficient? Do I need a hash table?.4.1 What ARP functionality do I have to handle?.3.2 Does the Ethernet MTU include the header?.3.1 Do I have to deal with the ethernet preamble/crc?.2.5 Ping/traceroute/etc appears to work, but I don’t see the return packets inside my router.2.4 When I run traceroute, why don’t get a reply from the hop before my router?.2.3 I tried running the skeleton code and then accessing one of the webservers, however it doesn’t work.2.1 How do I know that my topology is set up and working?.1.5 What sort of routing entries do we need to support in the routing table?.1.4 What kind of sanity checks should I perform on the packet header?.

1.3 What are good references for dealing with protocol headers?.

1.2 What is the best methodology for debugging my router?.

1.1 Which files in the stub code can I modify?.

Wireshark uses icmp traceroute