Virtual Private Network - the Netgroup at Politecnico di Torino
Virtual Private Network - the Netgroup at Politecnico di Torino
Virtual Private Network - the Netgroup at Politecnico di Torino
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Header fields<br />
• C, R, K, S<br />
• Flags in<strong>di</strong>c<strong>at</strong>ing <strong>the</strong> presence/absence of optional<br />
fields<br />
• s<br />
• strict source routing flag (if <strong>the</strong> destin<strong>at</strong>ion is not<br />
reached when <strong>the</strong> source route list end, <strong>the</strong> packet<br />
is dropped)<br />
• Recur<br />
• Max. number of ad<strong>di</strong>tional encapsul<strong>at</strong>ion permitted<br />
(must be 0)<br />
• Protocol<br />
• ID of <strong>the</strong> payload protocol<br />
• Routing<br />
• Sequence of IP addr. or ASs for source routing.<br />
VPN - 38 © M. Bal<strong>di</strong> & L. Ciminiera: see page 2
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