Computer Networks I IP addressing
Computer Networks I IP addressing
Computer Networks I IP addressing
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Subnetting<br />
Variable Length Subnet Mask (VLSM)<br />
<strong>Computer</strong> <strong>Networks</strong> I 18<br />
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If the mask has a fixed size, all the subnets are the same size.<br />
This is a big issue because in many situations we need very<br />
small blocks. The serial links require only 2 <strong>IP</strong> address!!<br />
VLSM allows to apply subnetting in a nested way<br />
VLSM requires specific support from dynamic routing<br />
protocols. R<strong>IP</strong>v1 y GRP does not support VSLM, while R<strong>IP</strong>v2,<br />
OSPF and EIGRP do.
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