[c-nsp] STP and PVST..

[Nick Cutting]

Once you get all devices to agree on the root bridge for RPVST+ (make sure vlan1 is allowed on the inter-vendor trunks) , 

You will also need for fast failover, to configure the downstream ports (servers / esx hosts etc) must be running portfast / portfast trunk. This stops them from re-converging when there is an upstream failure (which should be sub-second failover for R(PV)STP)

What is the other vendor and model number? 
Rapid should work for almost every vendor Except those old HP 5900's, which you must use MST.


-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Catalin Dominte
Sent: Wednesday, April 19, 2017 7:21 AM
To: Nicolas KARP <liste at karp.fr>; Ambedkar <p.ambedkar at gmail.com>
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] STP and PVST..

Yes, until you realise that Cisco MSTP does not talk to Juniper MSTP for some odd reason! :)


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On 19 April 2017 at 08:25:21, Nicolas KARP (liste at karp.fr) wrote:

Hello Ambedkar,

Are you able to use MSTP ? That's the standard between Cisco and Non Cisco switches :
http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24248-147.html

Best Regards,

Nick



2017-04-19 5:53 GMT+02:00 Ambedkar <p.ambedkar at gmail.com>:

> Namaskaram,
> I am having a problem of inter-operability of Cisco switches and
Non-Cisco
> switches.
>
> The configuration as follows
>
> Cisco Switches:
> PVST and RPVST (Proprietary protocols)
>
> Non-Cisco Switches:
> STP and RSTP (Open Standard)
>
> In STP/RSTP, both the Cisco and Non-Cisco switches are becoming Root 
> bridges, and when failover has to take place, the time to converge is
more.
> I guess BPDU packets are not exchanged properly.
>
> Any help how to resolve this issue..
>
> Thanks
> P Ambedkar
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