The IPv4 and IPv6 addresses of DNS name servers and the IPv4 addresses of NBNS name servers can be dynamically assigned to subscriber sessions from different authentication origins as listed in Table: DNS and NBNS name server authentication origins . The default subscriber management authentication origin priority determines the relative priority when DNS and NBNS name server IP addresses are obtained from multiple origins as illustrated in Figure: DNS and NBNS name server authentication origins.
| Default origin priority1 | ESM authentication origin | Name server | DNS/NBNS name server IP address configuration |
|---|---|---|---|
1 |
Python – alc.dtc.setESM() – alc.esm.set() |
NBNS |
alc.dtc.primNbns, alc.esm.primNbns alc.dtc.secNbns, alc.esm.secNbns |
IPv4 DNS |
alc.dtc.ipv4PrimDns, alc.esm.ipv4PrimDns alc.dtc.ipv4SecDns, alc.esm.ipv4SecDns |
||
IPv6 DNS |
alc.dtc.ipv6PrimDns, alc.esm.ipv6PrimDns alc.dtc.ipv6SecDns, alc.esm.ipv6SecDns |
||
3 |
Local user database2 (LUDB) |
NBNS |
options netbios-name-server <ip-address> [<ip-address>...(up to 4 max)] |
IPv4 DNS |
options dns-server <ip-address> [<ip-address>...(up to 4 max)] |
||
IPv6 DNS |
options6 dns-server <ipv6-address> [<ipv6-address>...(up to 4 max)] |
||
4 |
RADIUS (AAA) |
NBNS |
26.6527.29 Alc-Primary-Nbns 26.6527.30 Alc-Secondary-Nbns |
IPv4 DNS |
26.6527.9 Alc-Primary-Dns 26.6527.10 Alc-Secondary-Dns |
||
IPv6 DNS |
26.6527.105 Alc-Ipv6-Primary-Dns 26.6527.106 Alc-Ipv6-Secondary-Dns |
||
5 |
Diameter NASREQ (AAA) |
NBNS |
26.6527.29 Alc-Primary-Nbns 26.6527.30 Alc-Secondary-Nbns |
IPv4 DNS |
26.6527.9 Alc-Primary-Dns 26.6527.10 Alc-Secondary-Dns |
||
IPv6 DNS |
26.6527.105 Alc-Ipv6-Primary-Dns 26.6527.106 Alc-Ipv6-Secondary-Dns |
||
6 |
Local Address Assignment |
NBNS |
dhcp local-dhcp-server pool options netbios-name-server <ip-address> [<ip-address>...(up to 4 max)] |
IPv4 DNS |
dhcp local-dhcp-server pool options dns-server <ip-address> [<ip-address>...(up to 4 max)] |
||
IPv6 DNS |
dhcp6 local-dhcp-server defaults options dns-server <ipv6-address> [<ipv6-address>...(up to 4 max)] dhcp6 local-dhcp-server pool options dns-server <ipv6-address> [<ipv6-address>...(up to 4 max)] dhcp6 local-dhcp-server pool prefix options dns-server <ipv6-address> [<ipv6-address>...(up to 4 max)] |
||
8 |
DHCP |
NBNS |
dhcp local-dhcp-server pool options netbios-name-server <ip-address> [<ip-address>...(up to 4 max)] |
IPv4 DNS |
dhcp local-dhcp-server pool options dns-server <ip-address> [<ip-address>...(up to 4 max)] |
||
IPv6 DNS |
dhcp6 local-dhcp-server defaults options dns-server <ipv6-address> [<ipv6-address>...(up to 4 max)] dhcp6 local-dhcp-server pool options dns-server <ipv6-address> [<ipv6-address>...(up to 4 max)] dhcp6 local-dhcp-server pool prefix options dns-server <ipv6-address> [<ipv6-address>...(up to 4 max)] |
||
last resort |
Defaults IES/VPRN subscriber-interface |
NBNS |
No defaults |
IPv4 DNS |
default-dns <ip-address> [secondary <secondary-ip-address>] |
||
IPv6 DNS |
ipv6 default-dns <ipv6-address> [secondary <ipv6-address>] |
