Help me out from Voice Issues....

[abcd2008]

My Office operates out of two facilities - Bldg1 and Bldg2. The Datacenter is in Bldg1 and as all the servers and voice equipment like Nortel Meridian, Verint etc are also in Bldg1.
We have connected Bldg2 with Bldg1 by Metro Ethernet link with 45 mbps of bandwidth. The link is directly connected from Bldg1 core switch(3550) to Bldg2 Core Switch(3750) & 3750 is connected to 7 User access switch stack. Bldg2 runs on VOIP.
We have installed Nortel 2050 soft phones in all the desktops (around 230) in Bldg2 and agents take calls in soft phones.
There are complaints that sometimes in the day, around 20 agents face voice issues like voice crackling, voice distortion, customers unable to hear the agents or agents unable to hear customers and this continues for quite sometime.
Please find the configuration of the Bldg2 core Sw and the user access switch stack & Bldg1 Core Sw below.

Can you please suggest if any other configuration needs to be done?
=======================================================
Bldg2#
!
mls qos
!
interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/1
description *****Connected to CORE 1 Bldg1( Gi 0/11) *****
switchport trunk encapsulation dot1q
switchport mode trunk
duplex full
priority-queue out
mls qos trust cos
auto qos voip trust
channel-group 1 mode on
!
interface GigabitEthernet1/0/2
description ***** Connected to CORE 1 Bldg1(Gi 0/12) *****
switchport trunk encapsulation dot1q
switchport mode trunk
duplex full
priority-queue out
mls qos trust cos
auto qos voip trust
channel-group 1 mode on
!
interface GigabitEthernet1/0/5
description ** Connected to Bldg2 Stack ( Gi7/0/1 ) **
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/6
description ** Connected to Bldg2 Stack ( Gi1/0/1 ) **
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan3
description ******Management-VLAN*******
ip address 172.22.3.35 255.255.255.0
ip helper-address 172.22.4.2
ip helper-address 172.22.4.3
no ip redirects
no ip unreachables
standby ip 172.22.3.254
standby priority 99
standby preempt
!
interface Vlan111
description **** VLAN -111*****
ip address 10.133.111.252 255.255.255.0
ip helper-address 172.22.4.2
ip helper-address 172.22.4.3
no ip redirects
no ip unreachables
standby ip 10.133.111.254
standby priority 99
standby preempt
!
interface Vlan122
description ******VLAN-122*******
ip address 10.133.122.252 255.255.255.0
ip access-group 106 out
ip helper-address 172.22.4.2
ip helper-address 172.22.4.3
no ip redirects
no ip unreachables
standby ip 10.133.122.254
standby priority 99
standby preempt
!
==================================================
Bldg2 Stack Config ...

SwitchStack#
!
mls qos
!
interface FastEthernet1/0/2
switchport access vlan 111
switchport mode access
priority-queue out
mls qos trust cos
auto qos voip trust
!
interface GigabitEthernet1/0/1
description ** Connected to Bldg2 Core 1 ( Gi1/0/6 ) **
switchport trunk encapsulation dot1q
switchport mode trunk
!

interface GigabitEthernet7/0/1
description ** Connected to Bldg2 Core 1 ( Gi1/0/5 ) **
switchport trunk encapsulation dot1q
switchport mode trunk
!
===========================================================

Bldg1 Core Switch Config ...

Switch_bldg1#

!
mls qos
!
interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet0/11
desc **** Trunk port to Bldg2 ****
switchport trunk encapsulation dot1q
switchport mode trunk
bandwidth 45000
duplex full
mls qos trust cos
auto qos voip trust
priority-queue out
channel-group 1 mode on
!
interface GigabitEthernet0/12
desc **** Trunk port to Bldg2 ****
switchport trunk encapsulation dot1q
switchport mode trunk
duplex full
mls qos trust cos
auto qos voip trust
priority-queue out
channel-group 1 mode on
!
Auto Qos is implemented in every switch..can anybody help me out ..

 

[routerman]

If only 20 agents out of 230 are experiencing this problem I'd first look to see if they are all connected to the same switch. If so, check the error counters on the LAN ports, see if any ports have a high number of errors.

if these users are all connected to the same switch it may simply be a hardware issue, check the logs as well.

 

[abcd2008]

thankx for the reply but
some times it seems that 80 to 85% user logged out in pick hours ..facing voice issues .. it's not an hw issue ..i have checked everything .. there is no specific port for specific user ..DHCP is running ..IP assignment done automatically .

 

[BuckWeet]

Question.. Who/what is doing the conversion from GigE down to the 45meg pipe.. Keep in mind that these switches do not have buffering/queueing capabilities really needed for WAN usage.

You might look at setting up policing to control normal traffic to reserve enough for voice usage. However, you would need to review the hardware platforms as they both have limitations.


BuckWeet

 

[abcd2008]

Hi BuckWeet ..thanks for the reply ..
you mean to say Auto QoS is not possible in this type of switch .... for that can we implement Manual QoS ( Policy & Class Map ) ? if so ..then can u guid me hoe this will be possible ??