Cambium Networks PTP 820 Series, User Manual, Page: 979 / 1149

Chapter 21: TDM Services and Interfaces (CLI) Configuring TDM Pseudowire Services (CLI)
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Enabling CCM Messages (CLI)
In order for an MA to check the connectivity of the network path, you must enable CCM on the MA. To enable
CCM, enter the following command in pwe3 view:
pwe3> pwe3 soam ma ccm enable slot <slot> id <id>
Table 284 Pseudowire OEM CCM Messages CLI Parameters
Parameter Input Type Permitted Values Description
slot Number 1
id Number The ID of any
configured MA. The MA on which you want to enable
CCM.
The following command enables CCM on MA 1 on the E1/DS1 card:
pwe3> pwe3 soam ma ccm enable slot 4 id 1
Assigning an MA to a TDM Tunnel (CLI)
Once you have created at least two MAs and at least two TDM tunnels, you must assign the MAs to the tunnels. To
assign an MA to a TDM tunnel, enter the following command in pwe3 view:
pwe3> pwe3 tunnel ma-id modify slot <slot> tunnel <tunnel> ma-id <ma-id>
Table 285 Assigning MA to TDM Tunnel CLI Parameters
Parameter Input Type Permitted Values Description
slot Number 1
tunnel Number Any configured TDM
tunnel ID. The ID of the TDM tunnel.
ma-id Number Any configured MA ID. The MA you want to assign to the
tunnel.
The following command assigns MA 1 to TDM tunnel 1 on the E1/DS1 card:
pwe3> pwe3 tunnel ma-id modify slot 1 tunnel 1 ma-id 1
Configuring a Pseudowire Tunnel Group (CLI)
TDM 1:1 and 1+1 Dual Homing path protection are implemented by combining two pseudowire tunnels into a
single tunnel group. One of the tunnels in the group is designated as the primary tunnel. The other tunnel is
designated as the secondary tunnel.
CCM messages are sent from the TDM module to the CPU via both tunnels. In 1:1 path protection, only the
primary tunnel sends actual traffic. In 1+1 Dual Homing path protection, both tunnels send traffic.
The CPU monitors both paths using the CCM messages, and determines when to perform a switchover from the
primary tunnel to the secondary tunnel.