When configuring services to and from the node over the cellular PDN interface, the following points should be considered:
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The mode of operation that is required for the cellular PDN interface, either static cellular system IPv4, static cellular interface IPv4, dynamic cellular interface IPv4, static cellular interface IPv6, or dynamic cellular interface IPv6. See PDN router interfaces for information about each mode of operation.
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The service type that is required; for example, a VLL, VPLS, or VPRN. See Layer 2 and Layer 3 services for information about supported service types.
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The signaling type that is required, either T-LDP, BGP, or both. See MPLS and Router configuration for information about configuring signaling and routing.
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The routing and reachability of the node for each configured service type when the node is operating with two SIMs. For information about dual SIM deployment, see "Dual SIM Deployment" in the 7705 SAR-Hm and SAR-Hmc Interface Configuration Guide.
The combinations of considerations from the list above will result in different configuration requirements when enabling services over a cellular port.
The mode of operation of the cellular port for each enabled SIM is the main consideration when enabling services over cellular. Figure: IPv4 modes of operation on the cellular PDN interface shows an example of the IPv4 modes of operation. The points to consider for enabling services over cellular for each mode of operation are described below.
