isis-3----Page:7
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Field Description 0 1 2 3 4 5 6 7 +-+-+-+-+-+-+-+-+ | Rsvd |V|I|D|S| Flags +-+-+-+-+-+-+-+-+ S – Domain wide flooding D – Down bit I – IPv4 address follows V- IPv6 address follows Application ID – assigned by IANA Application IP Address Info: IPv4 and/or IPv6 address for application (not necessarily a Router ID) |