Interface names associate an IP address to the interface, and then associate the IP interface with a physical port. The logical interface can associate attributes like an IP address, port, Link Aggregation Group (LAG) or the system.
There are no default interfaces.
You can configure a VPRN interface as a loopback interface by issuing the loopback command instead of the sap sap-id command. The loopback flag cannot be set on an interface where a SAP is already defined and a SAP cannot be defined on a loopback interface.
When using mtrace or mstat in a Layer 3 VPN context then the configuration for the VPRN should have a loopback address configured which has the same address as the core instance's system address (BGP next-hop).
The following example displays a VPRN interface configuration:
*A:ALA-1>config>service>vprn# info
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...
vprn 1 customer 1 create
vrf-import "vrfImpPolCust1"
vrf-export "vrfExpPolCust1"
ecmp 8
autonomous-system 10000
route-distinguisher 10001:1
auto-bind-tunnel
resolution filter
resolution-filter ldp
vrf-target target:10001:1
interface "to-ce1" create
address 10.1.0.1/24
exit
exit
static-route-entry 10.5.0.0/24
next-hop 10.1.1.2
spoke-sdp 2 create
exit
no shutdown
exit
...
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*A:ALA-1>config>service#