IP Classless is used for route summarization and for further subnetting a
subnet for point-to-point WAN links using VLSM.It is important because by
using ip classless u can perform route summarization thereby saving on
bandwidth utilization,router processing and reduce the size of routing
tables.With regards to VLSM you will be better utilising your IP addressing
structure. It also supports discontiguous subnets,thereby letting the
subnets communicate with each other.
These I think are probably the most common reasons for using ip classless.
N.B IP Classful also has something called automatic summarization,but this
does not support discontiguous subnets.
EIGRP,OSPF,IS-IS,RIPv2,BGP are all classless routing protocols
Hope this explains what you want to know
>From: "Cisco Kid" <[EMAIL PROTECTED]>
>Reply-To: "Cisco Kid" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: IP Classless
>Date: Sun, 29 Oct 2000 13:40:01 -0000
>
>Hi,
>
>Can someone pls. give me a simple explanation of the IP Classless command
>and why/when it is necessary.
>
>Thanks
>
>Rashid
>
>
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