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Home > Archive > Voice over IP Cisco > January 2007 > Nortel LAN switches and Cisco IP Phones
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Nortel LAN switches and Cisco IP Phones
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| Tim Medley 2007-01-19, 1:11 pm |
| 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@moxieent.com
Phone: (704) 905-4604
| |
| Voll, Scott 2007-01-19, 1:11 pm |
| I assume that saving money on IP Phones should have been switches.
If you want to encourage cisco switches tell them they need twice as
many ports so you can run the phone on one Vlan and data on the other.
Really, if bandwidth is not an issue across the LAN then running on the
same VLAN shouldn't be an issue. I just wouldn't what to support it, or
the security. And TAC will say go talk to Nortel with any voice issues.
Just my 2 cents
Scott
________________________________
From: cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Tim Medley
Sent: Friday, January 19, 2007 9:21 AM
To: cisco-voip@puck-nether.net
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@moxieent.com
Phone: (704) 905-4604
| |
| Tim Medley 2007-01-19, 1:11 pm |
| Thanks Scott.
Yeah I understand the support issues. They could still use a single
port for voice and data, however all traffic would be in a single
vlan and would then have to be marked and queued via an acl to
discern the voice vs. data traffic.
tm
Tim Medley
Moxie Enterprises
Email: tim.medley@moxieent.com
Phone: (704) 905-4604
On Jan 19, 2007, at 1:15 PM, Voll, Scott wrote:
> I assume that saving money on IP Phones should have been switches.
>
>
>
> If you want to encourage cisco switches tell them they need twice
> as many ports so you can run the phone on one Vlan and data on the
> other.
>
>
>
> Really, if bandwidth is not an issue across the LAN then running on
> the same VLAN shouldn’t be an issue. I just wouldn’t what to
> support it, or the security. And TAC will say go talk to Nortel
> with any voice issues.
>
>
>
> Just my 2 cents
>
>
>
> Scott
>
>
>
> From: cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-
> bounces@puck.nether.net] On Behalf Of Tim Medley
> Sent: Friday, January 19, 2007 9:21 AM
> To: cisco-voip@puck-nether.net
> 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@moxieent.com
>
> Phone: (704) 905-4604
>
>
>
>
>
>
>
>
>
>
>
| |
| Simon, Bill 2007-01-19, 1:11 pm |
| We're using non-Cisco LAN equipment. We do not use VLANs; the voice =
network is segregated and there is no data traffic permitted =
(subnetting/ACLs).
The only way to do the "Cisco way" is to use cisco gear. CDP is a big =
deal. We are kind of sore that we don't have some of the additional =
functionality that CDP provides.
Voll, Scott wrote:
> I assume that saving money on IP Phones should have been switches.
> =
> =
> =
> If you want to encourage cisco switches tell them they need twice as =
> many ports so you can run the phone on one Vlan and data on the other.
> =
> =
> =
> Really, if bandwidth is not an issue across the LAN then running on the =
> same VLAN shouldn=92t be an issue. I just wouldn=92t what to support it,=
or =
> the security. And TAC will say go talk to Nortel with any voice issues.
> =
> =
> =
> Just my 2 cents
> =
> =
> =
> Scott
> =
> =
> =
> ------------------------------------------------------------------------
> =
> *From:* cisco-voip-bounces@puck.nether.net =
> [mailto:cisco-voip-bounces@puck.nether.net] *On Behalf Of *Tim Medley
> *Sent:* Friday, January 19, 2007 9:21 AM
> *To:* cisco-voip@puck-nether.net
> *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?
| |
| Craig M Staffin 2007-01-19, 1:11 pm |
| 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@moxieent.com>
Sent by: cisco-voip-bounces@puck.nether.net
01/19/2007 11:21 AM
To
"cisco-voip@puck-nether.net" <cisco-voip@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@moxieent.com
Phone: (704) 905-4604
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Lelio Fulgenzi 2007-01-19, 7:12 pm |
| 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@puck.nether.net ; cisco-voip@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@moxieent.com>
Sent by: cisco-voip-bounces@puck.nether.net
01/19/2007 11:21 AM
To "cisco-voip@puck-nether.net" <cisco-voip@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@moxieent.com
Phone: (704) 905-4604
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
------------------------------------------------------------------------------
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Voll, Scott 2007-01-19, 7:12 pm |
| For me, its more of a security issue then QoS on the LAN.
________________________________
From: cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Craig M Staffin
Sent: Friday, January 19, 2007 10:01 AM
To: Tim Medley
Cc: cisco-voip-bounces@puck.nether.net; cisco-voip@puck-nether.net
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@moxieent.com>
Sent by: cisco-voip-bounces@puck.nether.net
01/19/2007 11:21 AM
To
"cisco-voip@puck-nether.net" <cisco-voip@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@moxieent.com <mailto:tim.medley@moxieent.com>
Phone: (704) 905-4604
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
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