Thursday, November 6, 2014

call recorder port mirroring on VMWare ESXi

MiaRec leverages port mirroring function on the network switch. A virtual network adapter should be switched to promiscuous mode, otherwise MiaRec will not receive network packets from IP phones.
To configure promiscuous mode on VMWare ESX/ESXi:
  1. Log in to the ESX/ESXi host or vCenter Server using VI Client/vSphere Client.
  2. Select the ESX/ESXi host and click the Configuration tab.
  3. Under Hardware, click Networking.
  4. Click Properties of the virtual switch for which you want to enable promiscuous mode.
  5. To allow promiscuous mode on the virtual switch or portgroup, select the name of the virtual switch or portgroup and click Edit (note: the setting on the portgroup overrides the virtual switch setting).
  6. Click the Security tab.
  7. From the dropdown for Promiscuous Mode, select Accept.
Note: It is highly recommended to allocate a separate physical network adapter solely for call recording purposes (port mirroring). And enable promisuous mode only on that adapter. Otherwise a network performance of other virtual machines may degrade when promiscous mode is enabled on their virtual network adapters.
Especially this is recommended when other virtual machine has running DNS or DHCP services. These services work incorrectly when network adapter is opened in promiscuous mode, and this causes a distortion in audio on IP phone side.

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