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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O<strong>the</strong>r mechanisms in GRE<br />
• Flow control<br />
• Sli<strong>di</strong>ng window mechanism<br />
• Out-of-order packets<br />
• Discarded, because PPP admits lost packets,<br />
but cannot handle out-of-order packets<br />
• Timeout values<br />
• Re-computed each time an ack packet is<br />
received<br />
• Congestion control<br />
• Timeouts do not cause re-transmission<br />
• Used only to move sli<strong>di</strong>ng window<br />
• Their value should be rapidly increased<br />
VPN - 42 © M. Bal<strong>di</strong> & L. Ciminiera: see page 2
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