Cisco Model D-PCG1000 PowerKEY CAS Gateway Références techniques
Operations Alert Bulletin
Correcting QAM, MQAM, GQAM, or GoQAM Modulators
With Missing Key Certificates
With Missing Key Certificates
Purpose
This alert bulletin informs DNCS operators and engineers of a potential issue with
the addition or replacement of QAM, MQAM, GQAM or GoQAM modulators to
their network. If encrypted sessions are requested from a modulator having a
missing key certificate on the DNCS, then each request fails. Additionally, digital
video recorder (DVR) units may not be able to record and play back content
provided by a QAM modulator that is missing a key certificate.
the addition or replacement of QAM, MQAM, GQAM or GoQAM modulators to
their network. If encrypted sessions are requested from a modulator having a
missing key certificate on the DNCS, then each request fails. Additionally, digital
video recorder (DVR) units may not be able to record and play back content
provided by a QAM modulator that is missing a key certificate.
This bulletin provides instructions for using a script to proactively determine
whether a modulator has a missing key certificate on the DNCS. Instructions are also
provided to retrieve the missing key certificate in the event it is not stored in the
DNCS.
whether a modulator has a missing key certificate on the DNCS. Instructions are also
provided to retrieve the missing key certificate in the event it is not stored in the
DNCS.
Audience
This alert is written for Digital Network Control System (DNCS) operators and Cisco
Services personnel who are familiar with a UNIX editor.
Services personnel who are familiar with a UNIX editor.
Background
If a modulator is added or replaced in a network, the DNCS may initially configure
the key certificate as an invalid value, for example, 0 or NULL. Upon reboot of the
modulator, its IP address is stored in the DNCS database; however, the key
certificate is not correctly stored because a 0 or NULL value already exists in the
database.
the key certificate as an invalid value, for example, 0 or NULL. Upon reboot of the
modulator, its IP address is stored in the DNCS database; however, the key
certificate is not correctly stored because a 0 or NULL value already exists in the
database.
Unencrypted sessions can be built on modulators that have a 0 or NULL certificate.
As a result, this condition can go unnoticed. Encrypted sessions, however, cannot be
built on these modulators unless the correct certificate is known by the DNCS.
As a result, this condition can go unnoticed. Encrypted sessions, however, cannot be
built on these modulators unless the correct certificate is known by the DNCS.
Whenever modulators are added or replaced in the network, the procedures within
the Recommendations section of this Operations Alert Bulletin must be followed.
This ensures that the key certificate for the new modulator is correctly stored on the
DNCS.
the Recommendations section of this Operations Alert Bulletin must be followed.
This ensures that the key certificate for the new modulator is correctly stored on the
DNCS.