Are the L3 extreme switches compatible with Variable Length Subnet Masking (VLSM)?

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  • Updated 9 months ago
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Obernan Cavalcante

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Posted 9 months ago

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Brandon Clay, Escalation Support Engineer

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Yes, you can use standard CIDR notation (eg, 10.0.20.1/23) when configuring IP addresses on the switch..
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Obernan Cavalcante

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Ok, thanks for reply.
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Erik Auerswald, Embassador

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Hi,

the VLSM idea is from times back when classful IP routing was used. Old routing protocols did not send a subnet mask with the network address. But all modern routing protocols (including RIPv2 which is not really modern) include a network mask (or prefix length) and fully support CIDR (classless inter-domain routing) which includes all the features associated with VLSM (variable length subnet masks).

Extreme switches and routing protocols support classless IP routing by default.

Thanks,
Erik
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Obernan Cavalcante

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Ok, very thanks for explanation.