96x1H-IPI.2.1.600: Parameters (with persistent initialization parameters) that can only be set via DHCP |
Approved
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The following parameters will be initialized from the corresponding persistent parameters at startup and after a reset, and will be settable to the ASCII equivalent of a value received in the specified location(s) in a DHCP message. They will not be settable via a SET command in a configuration file, and they will not be testable via an IF command in a configuration file.
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Parameter
Name
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Persistent Parameter Name
and
(default value)
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location in
DHCP message
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Valid Values
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Notes
(usage and references)
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EXTDNSSRVR
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NVEXTDNSSRVR
(“0.0.0.0”)
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DHCPv4 ACK
option #6
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0 to 255 ASCII characters:
zero or more IPv4 addresses in dotted decimal format, separated by commas without any intervening spaces
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External (“outer”) DNS server IP address(es) in VPN mode,
see 96x1H-IPI.5.1.604.
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EXTGIPADD
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NVEXTGIPADD
(“0.0.0.0”)
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DHCPv4 ACK
option #3
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7 to 15 ASCII characters:
one IPv4 address in
dotted-decimal format
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External (“outer”) router IP address(es) in VPN mode,
see 96x1H-IPI.5.1.604.
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EXTIPADD
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NVEXTIPADD
(“0.0.0.0”)
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DHCPv4 ACK
yiaddr field
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7 to 15 ASCII characters:
one IPv4 address in
dotted-decimal format
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External (“outer”) IP address of the telephone in VPN mode,
see 96x1H-IPI.5.1.304 and 96x1H-IPI.5.1.604.
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EXTNETMASK
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NVEXTNETMASK
(“0.0.0.0”)
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DHCPv4 ACK
option #1
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7 to 15 ASCII characters:
one IPv4 address in
dotted-decimal format
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External (“outer”) subnet mask in VPN mode,
see 96x1H-IPI.5.1.604.
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GIPADD
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NVGIPADD
(“0.0.0.0”)
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DHCPv4 ACK
option #3
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7 to 127 ASCII characters:
one or more IPv4 addresses in dotted decimal format, separated by commas without any intervening spaces
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Gateway/router IP address(es)
see 96x1H-IPI.5.1.304.
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IPADD
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NVIPADD
(“0.0.0.0”)
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DHCPv4 ACK
yiaddr field
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7 to 15 ASCII characters:
one IPv4 address in
dotted-decimal format
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IPv4 address of the telephone,
see 96x1H-IPI.5.1.304.
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IPADDV6
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NVIPADDV6
(“::”)
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DHCPv6
Reply
IA Address option
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2 to 39 ASCII characters:
one IPv6 address in
colon-hex format
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Global IPv6 address of the telephone,
see 96x1H-IPI.5.1.306.
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Approved
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NETMASK
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NVNETMASK
(“0.0.0.0”)
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DHCPv4 ACK
option #1
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7 to 15 ASCII characters:
one IPv4 address in
dotted-decimal format
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IP subnet mask,
see 96x1H-IPI.5.1.304.
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TLSSRVR
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NVTLSSRVR
(see 96x1H-IPI.2.1.1150)
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DHCPv4 ACK
siaddr field (non-zero value only) and/or in the NVSSON option
DHCPv6
Reply
VSI option 242
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0 to 255 ASCII characters:
zero or more IP addresses in dotted-decimal, colon-hex, or DNS name format, separated by commas without any intervening spaces
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HTTPS server IP address(es),
see 96x1H-IPI.3.1.100.
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Rationale:
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TLSSRVR is not settable via a SET command in a configuration file, because once the configuration file is obtained, a different TLS server may not be used to obtain software code files. Software code files may only be obtained via HTTP, since they will be authenticated via a built-in digital signature, so there is no need to incur the TLS processing overhead for authenticating the transmission of each file segment.
However, in VPN mode, a file server IP address cannot be obtained from the “outer” DHCP server, usually cannot be obtained from a security gateway, and cannot be obtained from an “inner” DHCP server (via a unicast DHCPINFORM request) unless the security gateway provides an IP address for the “inner” DHCP server, so NVTLSSRVR is provided so that a file server IP address can be preconfigured and saved in non-volatile memory.
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