Thanks for all the help. I think we have a few things to look into now. Adam Baack
Sent from my iPhone On Dec 28, 2012, at 12:09 PM, "John Kaftan" <[email protected]> wrote: We had the same problem going between our S4 and our 6509. We moved to RST on the 6509 (spanning-tree mode rapid-pvst) It was painless and is probably a good choice so the 6509 was doing RST PVST and the Enterasys stuff was just doing RST. They seemed to be working well. I would log into the Enterasys switches and they would recognize the 6509 as the root bridge etc. Do you have Netsight? There is a flex view that can help you determine if you are getting lots of topology changes. Having lots of topology changes when your network is stable otherwise is a bad thing. It takes up resources and you will have performance problems. With the flex view you can see the number of topology changes and when the last topology change took place. If the number goes up rapidly and the time since the last change is always in minutes or seconds you have a problem. GTAC should be able to help you with that. As for the LAGs my first question is what is your long term plan? Are you going with an Enterasys core as well. If so skip the LAGs if you can. We tried for over a week and could not get a LAG stable between the 6509 and the S4. We kept getting the same error that you are. We tried filtering BPDUs on the Cisco because it seemed it was getting confused by the BPDUs coming accross the LAG. That helped for awhile but then after a couple of days the LAG went down again with err-disable on the Cisco side. Eventually we just bailed since the LAG was used for all traffic between our users and the server farm we couldn't have it failing. We have been watching the utilization and it is staying under 1 Gb so that will have to hold us until we can get the 6509 out of there for good. On Fri, Dec 28, 2012 at 10:00 AM, Baack, Adam <[email protected]> wrote: Disclaimer: We are mostly server guys here and know enough switching to be dangerous. We know very little about spanning tree, etc. We're implementing our phase 1 of our Enterasys replacement and have been installing B5 stacks in all of our headquarter IDFs. They are connecting back to a Cisco 6509 (Sup 2). We just started having problems where the 6509 would err-disable the LACP lag between the 6509 and the IDFs. The lag is set for trunking. In the terminal of the 6509 it shows channel mismatch error. We spoke with GTAC and they said something about the B5 stacks not participating in spanning tree and the 6509 doesn't know what to do so it disables it. Also, some of our IDFs have another Cisco switch farther down... example: 6509 --> B5 Stack --> Cisco 3750. The 3750 is also trunking. These setups seem to be the ones with problems. GTAC suggested possibly moving from PVST to RSTP so all of our spanning-tree is the same. Unfortunately I'm not exactly sure how we would do that or if that's the solution for us. Anyone have experience with this type of setup and did you have problems? Thanks. Adam Baack Network Administrator Lee County Sheriff's Office ***IMPORTANT MESSAGE*** This message is intended for the use of the person or entity to whom it is addressed and may contain information that is privileged and confidential, the disclosure of which is governed by applicable law. If the reader of this email is not the intended recipient or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this information is STRICTLY PROHIBITED. If you have received this email by error, please notify us immediately and destroy the related message. This footnote also confirms that this email message has been swept for the presence of computer viruses, worms, hostile scripts and other email-borne network threats. PLEASE NOTE: Florida has a very broad public records law. Most written communications to or from government officials are public records available to the public and media upon request. Your email communications may be subject to public disclosure per Sec. 119 F.S. --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] -- John Kaftan IT Infrastructure Manager Utica College * --To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected]
