Avaya Support Forums  

Go Back   Avaya Support Forums > Avaya Networking Products

Thread Tools Search this Thread Display Modes
Old 11-07-2012, 05:48 PM
alvinewe alvinewe is offline
Join Date: Aug 2011
Posts: 3
alvinewe has 10 reputation points
Default Design to setup ERS 4524 and Cisco Cat6509

Hi All,

I would like to get some feedback on any team that has deployed a stacked ERS4524 LAN Switch connected to the Cisco 6509 Core switch. What is the best possible method and what would the configuration be.

As tested the spanning tree does not work well between the vendors. And trunking would be an option but this is connecting an access layer to the Core thus do not need a trunking mode.

- Connected the stacked switch to the Cisco core, it created a loop on that VLAN.
- Spanning tree enable on the Avaya switch but the loop still happen.
- Default spanning tree enabled on the Cisco Cat6.

Please advise if you come across any such setup before.

ERS 4542GT - Ver 5.6.1

Example of the current topology.

AVAYA ERS ----------------------- CAT 6509
| Stacked |
AVAYA ERS ----------------------- CAT 6509
Reply With Quote
Old 11-12-2012, 07:10 AM
sidneyd sidneyd is offline
Hot Shot
Join Date: Aug 2012
Posts: 17
sidneyd has 11 reputation points

If you are using a untagged VLAN and STP, then this should work. You should then be able to check the STP status on ports from/to the Cat.

The default mode of spanning tree operation of Avaya switches is Avaya Spanning Tree mode, which determines how you handle STP packets on tagging on the links. This is generally compatable with most vendors, but there are ways in which Cisco can tag STP BPDU such that they will not be appropriate handles by the switch.

You may want to look at using something like MSTP mode (802.1s) on both switches which sets the switch to using standard based multiple Spanning Tree.
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -7. The time now is 02:39 AM.

This Forum is provided solely for the use and convenience of Avaya customers and partners. Use of the Forum is subject to the Terms and Use and Privacy Statement found at www.avaya.com. No other use is permitted. The Forum including all content posted is “AS IS” and Avaya expressly disclaims all warranties and/or guarantees as to its accuracy, reliability, usefulness, quality or non-infringement of intellectual property. Avaya reserves the right to remove any content posted on the Forum at any time and for whatever reason.

Avaya will not be liable for any content posted on this Forum, including, without limitation, any errors or omissions or for any losses or damages of any kind incurred as a result of use or reliance on any content, regardless of its origin.

You expressly understand and agree that you assume all risks associated with use or reliance on this content.