Ambit U10C034, User Manual

Page: 27 / 90

U10C034 MSO User’s Manual v1.4 June 2008
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of this object will be ignored.
‧
ethEtherType(0),
‧
ipVersionIHL(1),
‧
ipTOS(2),
‧
ipTotalLength(3),
‧
ipIdent(4),
‧
ipFlagsFragOffset(5),
‧
ipTTL(6),
‧
ipProtocol(7),
‧
ipHeaderChecksum(8),
‧
ipSA(9),
‧
ipDA(10),
‧
udpSourcePort(11),
‧
udpDestPort(12),
‧
udpLength(13),
‧
udpChecksum(14)
emtaPhsDownstreamVerification
(1.3.6.1.4.1.4413.2.2.2.1.6.1.18.0 Integer32)
This object controls whether or not the MTA requests PHS verification
(PHSV) by the CMTS on downstream PHS operations. The default is auto(3).
When set to auto(3), the MTA will automatically disable PHSV if the ipTOS(2),
ipTTL(6), ipHeaderChecksum(8) or udpChecksum(14) bits are set in
emtaPhsDownstreamMask.
When set to disabled(2), the MTA will disable PHSV at all times.
When set to enabled(1), the MTA will enable PHSV at all times.
This setting should be used with caution as it is possible to create a
non-working
configuration if verification is enabled and a non-predictable
downstream field (e.g. ipTTL) is suppressed.
Note that this setting only applies if emtaPhsConfiguration is set to
enabled(1). If emtaPhsConfiguration is set to disabled(2), then the value
of this object will be ignored.
‧
enabled(1),
‧
disabled(2),
‧
auto(3)