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Home > Archive > Voice over IP Cisco > September 2006 > Default Qos behaviour
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Default Qos behaviour
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| Aman Chugh 2006-09-28, 1:11 pm |
| All,
I would like to understand the default behaviour for QOS marking set by an
Ip phone for voice packets,In my scenario if dont have any qos settings
configured on the switch ,will the switch disregard/remove the marking set
by a cisco ipphone before passing them on next hop device,I ask this because
as I have configured CBWFQ with LLQ on my router but dont have any qos
settings on my switch where my phone connects ,I have not checked this out
with a sniffer just wanted to know if any one in the group knows about the
same.
Thanks for the help
Aman
| |
| Ryan Ratliff 2006-09-28, 1:11 pm |
| Depends on the switch hardware and whether qos is enabled or not
globally on the switch.
The QOS SRND talks about this for the 6500 and 3550 switches (perhaps
others too).
-Ryan
On Sep 28, 2006, at 10:22 AM, Aman Chugh wrote:
All,
I would like to understand the default behaviour for QOS marking set
by an Ip phone for voice packets,In my scenario if dont have any qos
settings configured on the switch ,will the switch disregard/remove
the marking set by a cisco ipphone before passing them on next hop
device,I ask this because as I have configured CBWFQ with LLQ on my
router but dont have any qos settings on my switch where my phone
connects ,I have not checked this out with a sniffer just wanted to
know if any one in the group knows about the same.
Thanks for the help
Aman
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Aman Chugh 2006-09-28, 1:11 pm |
| Thanks for the reply ryan,I have a 3560 switch and qos is not enabled on any
ports or globaly.will the qos both layer 2 (COS) and layer 3 (DSCP ) be
removed/disregarded by the switch which is set by Ipphones.
Aman
On 9/28/06, Ryan Ratliff <rratliff@cisco.com> wrote:
>
> Depends on the switch hardware and whether qos is enabled or not
> globally on the switch.
>
> The QOS SRND talks about this for the 6500 and 3550 switches (perhaps
> others too).
>
> -Ryan
>
> On Sep 28, 2006, at 10:22 AM, Aman Chugh wrote:
>
> All,
>
> I would like to understand the default behaviour for QOS marking set
> by an Ip phone for voice packets,In my scenario if dont have any qos
> settings configured on the switch ,will the switch disregard/remove
> the marking set by a cisco ipphone before passing them on next hop
> device,I ask this because as I have configured CBWFQ with LLQ on my
> router but dont have any qos settings on my switch where my phone
> connects ,I have not checked this out with a sniffer just wanted to
> know if any one in the group knows about the same.
>
> Thanks for the help
>
> Aman
> ________________________________________
_______
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
| |
| Carter, Bill 2006-09-28, 1:11 pm |
| Ryan,
On this topic...The QoS SRND has some very good information/scenarios
for configuring Cat 6500s for QoS. The problem is, there is multiple
scenarios and configuration samples for Cat OS, but 1 or 2 for Cat IOS.
Could you pass word along to the QoS SRND group that we would appreciate
more Cat 6500 IOS configuration samples?
Thanks
-----Original Message-----
From: cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Ryan Ratliff
Sent: Thursday, September 28, 2006 10:54 AM
To: Aman Chugh
Cc: cisco-voip@puck.nether.net
Subject: Re: [cisco-voip] Default Qos behaviour
Depends on the switch hardware and whether qos is enabled or not
globally on the switch.
The QOS SRND talks about this for the 6500 and 3550 switches (perhaps
others too).
-Ryan
On Sep 28, 2006, at 10:22 AM, Aman Chugh wrote:
All,
I would like to understand the default behaviour for QOS marking set by
an Ip phone for voice packets,In my scenario if dont have any qos
settings configured on the switch ,will the switch disregard/remove the
marking set by a cisco ipphone before passing them on next hop device,I
ask this because as I have configured CBWFQ with LLQ on my router but
dont have any qos settings on my switch where my phone connects ,I have
not checked this out with a sniffer just wanted to know if any one in
the group knows about the same.
Thanks for the help
Aman
________________________________________
_______
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
This email may contain proprietary and confidential information for the sole use of the intended recipient.
Any review, retransmission, dissemination, or other use of this information by persons or entities other than
the intended recipient is prohibited. If you are not the intended recipient, please contact the sender and
delete all copies. To the extent that opinions are expressed in this message, they are not necessarily the
opinions of Sentinel Technologies or any of its affiliates, employees, directors, officers or shareholders.
| |
| Ryan Ratliff 2006-09-28, 1:11 pm |
| http://www.cisco.com/en/US/netsol/ns656/
networking_solutions_design_guidances_li
st.html#anchor9
Let me know if you can't find it.
-Ryan
On Sep 28, 2006, at 12:20 PM, Aman Chugh wrote:
Thanks for the reply ryan,I have a 3560 switch and qos is not enabled
on any ports or globaly.will the qos both layer 2 (COS) and layer 3
(DSCP ) be removed/disregarded by the switch which is set by Ipphones.
Aman
On 9/28/06, Ryan Ratliff <rratliff@cisco.com> wrote: Depends on the
switch hardware and whether qos is enabled or not
globally on the switch.
The QOS SRND talks about this for the 6500 and 3550 switches (perhaps
others too).
-Ryan
On Sep 28, 2006, at 10:22 AM, Aman Chugh wrote:
All,
I would like to understand the default behaviour for QOS marking set
by an Ip phone for voice packets,In my scenario if dont have any qos
settings configured on the switch ,will the switch disregard/remove
the marking set by a cisco ipphone before passing them on next hop
device,I ask this because as I have configured CBWFQ with LLQ on my
router but dont have any qos settings on my switch where my phone
connects ,I have not checked this out with a sniffer just wanted to
know if any one in the group knows about the same.
Thanks for the help
Aman
________________________________________
_______
cisco-voip mailing list
cisco-voip@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip
| |
| Ryan Ratliff 2006-09-28, 1:11 pm |
| "When configured as an access layer switch, the recommended software
for the Supervisor is CatOS;
when configured as a distribution or core layer switch, the
recommended software is cisco IOS.
Furthermore, at the time of writing, Catalyst 6500 IOS does not yet
support AutoQoS nor the
conditional-trust feature, therefore only CatOS examples of these
models are given. However, both
AutoQoS VoIP and conditional trust have been committed for future
releases of Catalyst 6500 IOS."
I take this to mean a later version of the SRND may well have config
examples for IOS once the IOS is released that supports more of the
features.
-Ryan
On Sep 28, 2006, at 12:27 PM, Carter, Bill wrote:
Ryan,
On this topic...The QoS SRND has some very good information/scenarios
for configuring Cat 6500s for QoS. The problem is, there is multiple
scenarios and configuration samples for Cat OS, but 1 or 2 for Cat IOS.
Could you pass word along to the QoS SRND group that we would appreciate
more Cat 6500 IOS configuration samples?
Thanks
-----Original Message-----
From: cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Ryan Ratliff
Sent: Thursday, September 28, 2006 10:54 AM
To: Aman Chugh
Cc: cisco-voip@puck.nether.net
Subject: Re: [cisco-voip] Default Qos behaviour
Depends on the switch hardware and whether qos is enabled or not
globally on the switch.
The QOS SRND talks about this for the 6500 and 3550 switches (perhaps
others too).
-Ryan
On Sep 28, 2006, at 10:22 AM, Aman Chugh wrote:
All,
I would like to understand the default behaviour for QOS marking set by
an Ip phone for voice packets,In my scenario if dont have any qos
settings configured on the switch ,will the switch disregard/remove the
marking set by a cisco ipphone before passing them on next hop device,I
ask this because as I have configured CBWFQ with LLQ on my router but
dont have any qos settings on my switch where my phone connects ,I have
not checked this out with a sniffer just wanted to know if any one in
the group knows about the same.
Thanks for the help
Aman
________________________________________
_______
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
This email may contain proprietary and confidential information for
the sole use of the intended recipient.
Any review, retransmission, dissemination, or other use of this
information by persons or entities other than
the intended recipient is prohibited. If you are not the intended
recipient, please contact the sender and
delete all copies. To the extent that opinions are expressed in this
message, they are not necessarily the
opinions of Sentinel Technologies or any of its affiliates,
employees, directors, officers or shareholders.
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