Dhcpcd - DHCPv6 not able to send vendor specific information

[sudhaust]

Issue 1: Dhcpcd - DHCPv6 not able to send vendor specific information
Please find the dhcpcd version and configuration file and dhcpcd start procedure.

dhcpcd --version
dhcpcd 10.0.6
Copyright (c) 2006-2023 Roy Marples
Compiled in features: INET ARP ARPing IPv4LL INET6 DHCPv6 AUTH PRIVSEP

cat /etc/dhcp/DHCPCV6lcn00.conf_dhcpcd
ia_na 1
define6 17 request encap vsio
encap 1 string vendorname
encap 2 array ip6address controllerip
encap 3 string controllerurl
encap 5 string image-file-name
encap 6 string config-file-name
encap 7 string transfer-mode
encap 8 ip6address file-server-address
encap 9 uint32 file-server-port-number

define6 242 request array ip6address next-hop
define6 39 norequest embed fqdn
define6 82 norequest uint32 sol_max_rt
define6 83 norequest uint32 inf_max_rt

noipv6rs
option domain_name_servers, domain_name, domain_search
option rapid_commit
vendclass 21 "sudha";
duid 00:02:00:00:00:d3:4c:42:46
vendor 21,00:00:00:d3:00:01:00:1c:46:75:6a
root@sudha:~#
/sbin/dhcpcd -b -d -6 -D lcn00 -c /etc/dhcp/dhclient-exit-hooks.d/add-default-route -f /etc/dhcp/DHCPCV6lcn00.conf_dhcpcd --debug

dhcpv6 solicit packet does not have this value highlighted in below, expecting this vaue should pass in dhcpv6 solicit under option 17.
vendor 21,00:00:00:d3:00:01:00:1c:46:75:6a

Issue 2: Dhcpcd - DHCPv6 dumplease command not printing vendor specific information which there in the reply packet.
/sbin/dhcpcd --dumplease -6

Any help much appreciated.