Use the syntax to modify VPRN parameters (VPRN services command reference).
*A:ALA-1>config>service# info
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...
vprn 1 customer 1 create
shutdown
vrf-import "vrfImpPolCust1"
vrf-export "vrfExpPolCust1"
maximum-routes 2000
autonomous-system 10000
route-distinguisher 10001:1
interface "to-ce1" create
address 10.1.1.1/24
sap 1/1/10:1 create
exit
exit
static-route 10.5.0.0/24 next-hop 10.1.1.2
bgp
router-id 10.0.0.1
group "to-ce1"
export "vprnBgpExpPolCust1"
peer-as 65101
neighbor 10.1.1.2
exit
exit
exit
spoke-sdp 2 create
exit
exit
...
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*A:ALA-1>config>service>vprn#