SR OS supports type 2 DUID (link local), which is set to the chassis serial number. Type 3 (enterprise) is set to the chassis MAC address. Type 1 is not supported.
For type 2 DUID, the SR OS sends the Nokia Enterprise ID as the second byte of the DUID, followed by the chassis serial number. The first byte is the DUID type code. The chassis serial number starts with capital ASCII letters, which ensures that the serial number is unique as an application ID in the SR OS IPv6 DHCP application domain.
DUID type codes are as follows:
DHCP6C_DUID_ENT_ID__IPSEC_IPV4ADDR - 1
DHCP6C_DUID_ENT_ID__IPSEC_ASN1DN - 2
DHCP6C_DUID_ENT_ID__IPSEC_FQDN - 3
DHCP6C_DUID_ENT_ID__IPSEC_USER_FQDN - 4
DHCP6C_DUID_ENT_ID__IPSEC_IPV6ADDR - 5
DHCP6C_DUID_ENT_ID__IPSEC_ASN1GN - 6
DHCP6C_DUID_ENT_ID__IPSEC_KEYID - 7
DHCP6C_DUID_ENT_ID__WLAN_GW - 8
DHCP6C_DUID_ENT_ID__AUTOBOOT - 9
DHCP6C_DUID_ENT_ID__ZTP_BOF_AUTOP - Capital letters in ASCII