The VSM-CCA-XP MDA offers a hybrid mode for simplified provisioning and a high capacity VSM when inserted on IOM cards. The complete forwarding path bandwidth (in this case 25 Gb/s) is available, allowing single conversations up to 25 Gb/s on a single MDA.
A VSM-CCA-XP has two ports, port x/x/1 and port x/x/2, which are internally connected. Configuration is very similar to a physical loop-back port using Ethernet hybrid ports with dot1Q encapsulation. The use of the Ethernet VLAN tag connects the SAPs.
The following constraints apply to the configuration of the VSM-CCA-XP:
While LAG is available LACP is not allowed.
Ethernet CFM is only available when Eth-Rings are configured on the VSM (Ethernet rings use Ethernet MEPS for control).
ATM/Ethernet Last-Mile Aware QoS for Broadband Network Gateway is not supported.
The following is an example configuration for an MDA provisioned as a VSM-CCA-XP MDA.
*A:PE-1>config>card# info
----------------------------------------------
card-type iom3-xp-c
mda 1
mda-type m10-1gb-xp-sfp
no shutdown
exit
mda 2
mda-type vsm-cca-xp
no shutdown
exit
no shutdown
----------------------------------------------
*A:PE-1>config>card# exit all
*A:PE-1# show mda
===============================================================================
MDA Summary
===============================================================================
Slot Mda Provisioned Type Admin Operational
Equipped Type (if different) State State
-------------------------------------------------------------------------------
1 1 m10-1gb-xp-sfp up up
2 vsm-cca-xp up up
===============================================================================
*A:PE-1#
The following is an example VSM-CCM-XP configuration for ports:
port 1/2/1
ethernet
exit
no shutdown
exit
port 1/2/2
ethernet
exit
no shutdown
exit
Port and Ethernet QoS parameters may be configured as they are for a physical port. The Ethernet on VSM-CCA-XP has a reduced set of features. For example, dot1Q is the only supported encapsulation. LACP cannot be configured on LAGs using the port.
The ports may be used directly by service SAP in the case of a single loop back. If resiliency is required, or more capacity is needed, a LAG can be configured.
The following is an example configuration for LAG on a single VSM-CCA-XP MDA:
lag 1
mode hybrid
encap-type dot1q
port 1/2/1 // VSM-CCA-XP
no shutdown
exit
lag 2
mode hybrid
encap-type dot1q
port 1/2/2 // VSM-CCA-XP
no shutdown
exit
The following is an example for a VPLS service equivalent using the LAG port:
vpls 121 customer 1 create
stp
shutdown
exit
sap lag-1:1001 create // Connect using VLAN Tag 1001
exit
no shutdown
...
exit
The following is an example for an IES service equivalent to the configuration:
ies 122 customer 1 create
interface "Loopback" create
address 10.1.1.1/24
sap lag-2:1001 create
ingress
qos 3
exit
egress
qos 1010
exit
exit
exit
...
no shutdown
exit