[f-nsp] CER-2024 Forwarding Issue's

[Daniel Hooper]

Thanks Nick,

We have STP disabled on this particular switch for "historic" reasons.

On advice from a Brocade rep I'm upgrading the box to 5.6.0ff

We don't run with port-security either, but probably something I should look at rolling out.

As we are connecting a dozen or so customer networks into the chassis that we have no control over I suspect some type of loop in the network is the root cause of the problem.

Regards,

Daniel

-----Original Message-----
From: foundry-nsp [mailto:foundry-nsp-bounces at puck.nether.net] On Behalf Of Nick Hilliard
Sent: Wednesday, 12 August 2015 5:04 PM
To: foundry-nsp at puck.nether.net
Subject: Re: [f-nsp] CER-2024 Forwarding Issue's

On 12/08/2015 06:17, Daniel Hooper wrote:
> *         Traffic stops forwarding between interfaces
> *         Unable to learn new mac address's on interfaces

i've seen similar issues on the ces2k platform after stp topology changes where l2 forwarding was basically hosed and the unit needed to be rebooted.
 It looked at the time like the problem was caused by a temporary microloop, but it was only a problem on ports which had port security enabled.

The problem went away after we upgraded from 5.4 to 5.6.0c, made the affected unit singly-homed (i.e. no possibility of loops) and migrated all the ports to layer 2 acls.

Nick

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