@param client_index - opaque cookie to identify the sender
@param context - sender context, to match reply w/ request
@param is_add - add address if non-zero, else delete
- @param eid_type -
- 0 : ipv4
- 1 : ipv6
- 2 : mac
@param rmt_eid - remote eid
@param lcl_eid - local eid
- @param rmt_len - remote prefix len
- @param lcl_len - local prefix len
@param vni - virtual network identifier
@param dp_table - vrf/bridge domain id
@param action - negative action when 0 locators configured