Practical TCP/IP and Ethernet Networking for Industry

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routers or destinations are permitted, but not required, to verify that these conditions are

satisfied. If a violation is detected, it should be reported to the source by an ICMP

parameter problem message, code 0, pointing to the high-order octet of the flow label

field.

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ARP is used with IPv4. Initially the designers of IPv6 assumed that it would use ARP as

well, but subsequent work by the SIP, SIPP and IPv6 working groups led to the

development of the IPv6 ‘neighbor discovery’ procedures that encompass ARP, as well as

those of router discovery. ...