12-08-2010 12:10 PM - edited 03-06-2019 02:25 PM
I am testing a record software for Cisco IP Phones. This software must receive voice traffic from mirrorred ports on a 3560 switch. I´ve configured the span ports in this switch, but the only traffic I can see is broadcast and multicast. I didn´t see neither the audio streamming nor the call signaling (I can´t see any unicast traffic). Below is part of the configuration of the 3560 switch.
spanning-tree mode rapid-pvst
spanning-tree loopguard default
spanning-tree portfast bpduguard default
spanning-tree etherchannel guard misconfig
spanning-tree extend system-id
spanning-tree uplinkfast
spanning-tree backbonefast
!
vlan internal allocation policy ascending
!
!
!
interface FastEthernet0/1
switchport access vlan 23
switchport mode access
switchport voice vlan 51
spanning-tree portfast
!
interface FastEthernet0/2
switchport access vlan 23
switchport mode access
switchport voice vlan 51
spanning-tree portfast
!
interface FastEthernet0/3
switchport access vlan 23
switchport mode access
switchport voice vlan 51
spanning-tree portfast
!
interface FastEthernet0/4
switchport access vlan 23
switchport mode access
switchport voice vlan 51
spanning-tree portfast
!
interface FastEthernet0/5
switchport access vlan 23
switchport mode access
switchport voice vlan 51
spanning-tree portfast
!
interface FastEthernet0/6
switchport access vlan 23
switchport mode access
switchport voice vlan 51
spanning-tree portfast
!
interface FastEthernet0/14
switchport access vlan 23
switchport mode access
switchport voice vlan 51
spanning-tree portfast
!
interface FastEthernet0/48
speed 100
duplex full
spanning-tree portfast
!
monitor session 1 source interface Fa0/1 - 6 , Fa0/14
monitor session 1 filter vlan 51
monitor session 1 destination interface Fa0/48
The ports with IP Phones are 1 to 6 and 14. The port that will receive the VoIP traffic is 48.
The switch is loaded with C3560 Software (C3560-IPBASE-M), Version 12.2(50)SE1.
Have anyone had this problem before?
Best Regards.
Fujimura.
12-14-2010 06:21 AM
Hi.
I´ve tried this already, but I did it again. I´ve upgraded too the ios to 12.2(55)SE1-C3560-IPBASEK9-M version.
After the command is done (monitor session 2 dest int fa0/48 enc replicate), I can see no more traffic, neither broadcast, nor multicast.
Best Regards.
Fujimura.
12-14-2010 06:41 AM
Could you check if any traffic is captured(without encapsulation replicate) at the destination port by a PC with wireshark ?
-Reghu.
12-14-2010 08:25 PM
Hi.
I tested with my own notebook. I used wireshark and packetizer sniffers. With no "encapsulate replicate" option (command "monitor session 2 destination interface fa0/48"), i see only broadcast and multicast traffic. I changed the destination port too, but the problem still happens.
Best Regards.
Fujimura.
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