Solved: spanning-tree modes and older switches

joerg-hartmann · ‎06-12-2008

Hello,

i have some 3560G switches, which are running rapid-PVST+ .

Now i would like to integrate some older 3550s to this LAN. As far as i can see they are only capable of rapid PVST (without the +).

Do i have to switch back to the older PVST to use the 3550s with the 3560Gs ?

regards

Joerg

Jon Marshall · ‎06-12-2008

Joerg

PVST was designed for use with ISL encapsualtion.

PVST+ was designed for use with 802.1q encapsulation.

The 3550 supports Rapid-PVST+ just as the 3560 switches do. Some of the literature can be a bit confusing but see attached link which clearly shows that Rapid-PVST+ is supported by 3550 switches.

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_example09186a00807b0670.shtml

Jon

View solution in original post

Jon Marshall · ‎06-12-2008

Joerg

PVST was designed for use with ISL encapsualtion.

PVST+ was designed for use with 802.1q encapsulation.

The 3550 supports Rapid-PVST+ just as the 3560 switches do. Some of the literature can be a bit confusing but see attached link which clearly shows that Rapid-PVST+ is supported by 3550 switches.

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_example09186a00807b0670.shtml

Jon

joerg-hartmann · ‎06-12-2008

Hello Jon,

thanks for your answer.

I thought i did RTFM, but it seems i missed the right "M".

So - thanks for your help!

regards

Joerg

mhrhabibbd · ‎06-13-2008

thans jon

same as say!

thanks for your answer.

I thought i did RTFM, but it seems i missed the right "M".

So - thanks for your help!

Habib