> -Original Message-
> From: juniper-nsp [mailto:juniper-nsp-boun...@puck.nether.net] On Behalf Of
> Johan Borch
> Sent: Tuesday, August 27, 2013 4:57 AM
> To: juniper-nsp@puck.nether.net
> Subject: [j-nsp] Connecting two spanning-tree domains
>
> Hi!
>
>
On 8/27/13 8:16 AM, Johan Borch wrote:
> This is basically two datacenters with a lot of devices on each side, and I
> need to exchange vlans in a redundant way. I need something solid so that
> one side can't interfere with the other side. Is there some way to add an
> extra L2 device between the
Yep - Agree with Josh. I had this same scenario where a customer was migrating
data centers. We built a new DC based off Juniper hardware and needed to
provide connectivity to the old DC (within the same colo) which was all Cisco
based (MSTP (Juniper) to PVST (Cisco)).
At first we connected the
If you filter out BPDUs it won't change the roots, but it won't talk
either protocol. What you're talking about is breaking fundamental
part of spanning tree anyway so why do you care if the device even
participates in the process?
On Tue, Aug 27, 2013 at 10:16 AM, Johan Borch wrote:
> This is ba
This is basically two datacenters with a lot of devices on each side, and I
need to exchange vlans in a redundant way. I need something solid so that
one side can't interfere with the other side. Is there some way to add an
extra L2 device between the networks to act as some kind of spanning tree
"
You will have to be very careful. If I'm not mistaken MST actually uses CST to
tie together the multiple spanning tree instances running in MST. If you tie in
a Cisco device running RSTP the Juniper and Cisco devices will default to CST
on those links since that's the common ground (as Johan sai
This is a juniper forum so I apologize ahead of time for the vendor-C
reference below (but standards-based L2 works mostly the same across all
vendor implementations):
https://supportforums.cisco.com/thread/344842
--
Regards,
Ge Moua
Univ of Minn Alumnus
--
On 08/27/2013 08:16 AM, Johan Borch
Will that mean that I still have two roots, one in each network and that
they don't affect each other?
Regards
Johan
On Tue, Aug 27, 2013 at 2:53 PM, Ge Moua wrote:
> IIRC once joined, the MST and r-pvst L2 domains will speak CST (as a
> common denominator). You may want to consider pruning
IIRC once joined, the MST and r-pvst L2 domains will speak CST (as a
common denominator). You may want to consider pruning vlans where only
needed (esp if you have a high vlan count on either or).
--
Regards,
Ge Moua
Univ of Minn Alumnus
--
On 08/27/2013 03:56 AM, Johan Borch wrote:
Hi!
I
Hi!
I need to connect two spanning-tree domains, one is running MSTP and one is
running rapid-pvst. Is this doable? The two networks have different roots
and it needs to stay like that but I still need redundant links between
them. I need to transport VLANs from one network to the other and only o
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