hi!
please use dial-peer cor custom.
syntax:
dial-peer cor custom
name
name
.
.
then use dial-peer cor list.
syntax:
dial-peer cor list
member
member
.
.
where members are the names you declared in dial-peer cor custom.
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it is analogous with CSS and Partition:
CSS = dial-peer cor list
Partition = names in dial-peer cor custom
see usage at cisco.com