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vlan down

yoyo_the_king
Level 1
Level 1

hi,

i have a switch 2950.

i create 2 interface vlan (1 and 2).

the problem is when i do "conf t" , "interface vlan 1), "no shut" the int vlan1 is up but vlan2 is down.

and the same with int vlan2.

i dont know what's the problem.

why they can not be up in the same time.

5 Replies 5

Edison Ortiz
Hall of Fame
Hall of Fame

You are creating two Layer3 interfaces and this switch is only Layer2, hence it's a limitation in the hardware.

However, you are allowed to create multiple Layer2 Vlans but in order to perform inter-vlan routing, you need a Layer3 device (router or switch) connected to both Vlans.

but the switch accept ip address for vlan interfaces.

They do but those IP addresses will never become active if the interface is down/down.

That's how the hardware limit its use. Only one Layer3 up/up at the time.

thanks in understand now.

but there is no solution without change hardware?

No solution without changing the hardware, that's correct.

If you need to play with inter-vlan routing at the switch level, the cheapest switch would be a 3560 compact switch (8 port model).

http://www.cisco.com/en/US/products/hw/switches/ps5528/index.html

and here is the current Cisco switch line

http://www.cisco.com/en/US/products/hw/switches/index.html

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