[j-nsp] SRX110 and Cisco2970 MSTP issue

[Jonathan Lassoff]

The other that that comes to mind for me is security policy.

Is it possible that there could be security policy in place that
blocks flows in the topology that is formed when your SRX is root?

Cheers,
jof

On Mon, Nov 19, 2012 at 9:55 PM, Jeff Wheeler <jsw at inconcepts.biz> wrote:
> On Mon, Nov 19, 2012 at 6:04 PM, Ali Sumsam
> <ali+junipernsp at eintellego.net> wrote:
>> If I try to set the priority on one of the SRX110 to become root bridge,
>> MSTP seems to be converged but there are huge packet losses in the network.
>> I removed the priority and one of the cisco2970 became root and then
>> everything seems to be fine. No packet loss after that.
>
> Just taking a wild guess here, but does the SRX110 have enough
> forwarding performance, and enough port speed, to switch all of the
> traffic between your 2970s?  Check the CPU usage and link headroom
> when the SRX is root.  Unless you manipulate your port costs, the
> configuration you suggested would have traffic going
> 2970#1---SRX110---2970#2.
>
> --
> Jeff S Wheeler <jsw at inconcepts.biz>
> Sr Network Operator  /  Innovative Network Concepts
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