IP routing on 6500 series vs 3750

[anand ukey]

For intervlan routing, Is 'IP routing' command enabled by default on a 6500 series switches based on the IOS?

and on 3750 switches, do we need to enable the "ip routing" command manually for intervlan routing?

Request to please calarify.

[Latchum Naidu]

Hi,

You need to manually enable routing on the 3750 switch by using the ip routing command. Even if IP routing was previously enabled, this step ensures that it is activated.

Switch(config)#ip routing

On a 6500 series switches IP routing is by default enabled.

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Regards,
Naidu.

[Latchum Naidu]

For your information regarding 6500...

IP routing is enabled by default. However, IP routing does not work if what must be routed is not configured on the switch. This is because the switch has a built-in router.

IP routing cannot be disabled on the Supervisor 720 (Sup 720). However, the ports can all be configured as Layer 2 (L2) ports. The ports can all be L2 access ports in particular VLANs, which can accomplish the desired effect.

The no ip routing is a classical IOS command used to disable IP routing on routers. This command is usually used on low-end routers, on Cat 6k this command doesn't make sense hence, command will not be saved across reload if entered. When you enter the no ip routing command you may get a console message: "Cannot disable ip routing on this platform"

Note: When IP routing is enabled, the cpu resources are wasted in performing the Layer 3 (L3) computation. Hence when L3 functionality is not needed, do not configure it.

Please rate the helpfull posts.

Regards,

Naidu.