spanning-tree modes and older switches

Answered Question
Jun 12th, 2008
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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

Correct Answer by Jon Marshall about 8 years 10 months ago

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


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Correct Answer
Jon Marshall Thu, 06/12/2008 - 02:18
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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 Thu, 06/12/2008 - 03:55
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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 Fri, 06/13/2008 - 02:45
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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

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