Default VLAN on Cisco catalyst 2950

Unanswered Question
Feb 6th, 2008
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we are using cisco catalsyt and have mangement interface configured on it with all ports in VLan 1 (default Vlan)

IP assigned to management interface is say for example

int vlan 1

ip addr

the PCs attached to this switch have IP range as to with gateway as and subnet mask as on all PC's.

the Router interface towards LAN (ie switch ) has ip as

all remaining same , if i change the subnet mask assigned to management vlan from to (/30), will it have any impact on the functioning of PCs . if no impact , then what is the purpose of assigning IP and netmask to interface Vlan 1 apart from management (eg telnet etc) purpose

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syedsohailsarwar Wed, 02/06/2008 - 10:28
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Kindly READ IP Range of PC's as to

and not as ( it was a typo)

Jon Marshall Wed, 02/06/2008 - 10:31
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The management IP address assigned to vlan 1 does not effect the PC's, only your ability to manage the switch.

The purpose is exactly what you have said. The ability to remotely manage your switch rather than having to use a console connection and be physcially at the switch.



srue Wed, 02/06/2008 - 11:14
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If you change the subnet mask of the management interface, you face the risk of not being able to reach it through the network.

glen.grant Wed, 02/06/2008 - 16:17
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I don't understand why you would change it. falls into your pc range of , why would you change it to a /30 , it would serve no purpose.

syedsohailsarwar Fri, 02/08/2008 - 07:42
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Hi Glen

i know it falls in same subnet but i faced this situation as one of my friends changed the subnet mask of management interface from /25 to /30

so i was bit inquisitive , wther it will have any impact


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