[cisco-voip] Nortel LAN switches and Cisco IP Phones

[Lelio Fulgenzi]

Two things I can see here prevent an all out move away from seperate VLANs:
  a.. being able to trust the phone's QoS markings over the PCs
  b.. being able to successfully put CallManagers behind a firewall
If you can get those two things out of the way, I agree that seperate VLANs are not a requirement.

But I'm glad I have them. ;)

--------------------------------------------------------------------------------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
I'm changing my name to iPhone. Who do I pay trademark rights to?
  ----- Original Message ----- 
  From: Craig M Staffin 
  To: Tim Medley 
  Cc: cisco-voip-bounces at puck.nether.net ; cisco-voip at puck-nether.net 
  Sent: Friday, January 19, 2007 1:00 PM
  Subject: Re: [cisco-voip] Nortel LAN switches and Cisco IP Phones



  I know this is going to open a whole long discussion BUT 

  Is having your phone traffic seperated really needed.  Is QOS on a LAN really actually needed.  I mean come on we all have atleast gig uplinks I want to see where the buffers on the switch get full enough to slow down traffic over the 20ms jitter buffer on a local LAN segment or drop packets. 

  Now over the WAN thats somewhere that QOS definatly needs to be involved. 

  Just my thoughts 
  Craig




        Tim Medley <tim.medley at moxieent.com> 
        Sent by: cisco-voip-bounces at puck.nether.net 
        01/19/2007 11:21 AM 
       To "cisco-voip at puck-nether.net" <cisco-voip at puck.nether.net>  
              cc  
              Subject [cisco-voip] Nortel LAN switches and Cisco IP Phones 

              

       



  A customer just posed a question to me and I couldn't find anything on google. 

  Are there any interoperability issue with using Nortel LAN switches with Cisco IP Phones. The CIO for this customer is looking to save some $ by using non-cisco ip phones.  

  My first thoughts were that the Cisco switch provides two things, power and voice vlan support. The nortel switches do support 802.3af so power should not be an issue. But since CDP is a cisco proprietary protocol, the nortel switches won't support CDP which means that the phones will not automatically use the voice vlan for voice traffic. This just means that the customer would have to do something else to segregate and QoS the voice traffic such as an acl. 

  Are there any other considerations? 


  tm 
    
  Tim Medley 
  Moxie Enterprises 
  Email: tim.medley at moxieent.com 
  Phone: (704) 905-4604 
    


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