Table of Contents
Release Notes for Cisco INA2320 Interactive Network Adapter for Release 2.2a
Configuration Hint When Configuring Using the Terminal Interface
New Software Features in Cisco INA2320 Release 2.2a
Upgrading the INA2320 to Software Version 2.2a
Obtaining Technical Assistance
February 23, 2001
|Note You can find the most current Cisco documentation on Cisco.com. This set of electronic documents may contain updates and modifications made after the hard-copy documents were printed.|
These release notes for the Cisco INA2320 Interactive Network Adapter support Cisco INA2320 Software Release 2.2a. These release notes are updated as needed to describe new features; memory requirements; hardware support; and changes to the microcode, configuration software, and related documents.
For a list of caveats that apply to Release2.2a, see the "Open Caveats for Release 2.2a" section.
These release notes discuss the following topics:
- System Requirements
- New and Changed Information
- Related Documentation
- Obtaining Documentation
- Obtaining Technical Assistance
The Cisco INA2320 Interactive Network Adapter is the headend unit controlling the bidirectional broadband data communication over the hybrid fiber coaxial (HFC) network to the customer premises equipment (CPE) that is connected to the HFC network. The Cisco INA2320 Interactive Network Adapter is based on the open Digital Video Broadcast (DVB) standards.
The Cisco INA2320 interfaces to DVB-compliant CPE and provides the link to the backbone network toward the Internet Protocol (IP) hosts using an Ethernet interface.
You can configure and monitor the Cisco INA2320 using the Cable DVB/DAVIC Management Program; this program is based on Simple Network Management Protocol (SNMP) standard.
The hardware components supported in this release include:
- Cisco INA2320 chassis
- CPU-LAN module
- Modulator module with 2 downstream channels
- Demodulator module 1 and 2 (4 upstream channels per module)
- Power supply unit
- Upconverter module 1 and 2
- IF Amplifier module 1 and 2
- Power connector
Unless properly installed, the Cisco INA2320 Demodulators are sensitive to RF signals induced on the cables at the upstream frequencies.
To ensure the immunity of the Cisco INA2320 Demodulator module all cables connected to the INA must be of a high quality with double screening or solid outer conductor. RG216 cables or bamboo cables are recommended.
Signal couplers should be located as close to the Cisco INA2320 as possible, preferably in the same rack section, and connected to the Cisco INA2320 by the shortest possible sections of cable.
The CPU-LAN, Modulator modules, and Demodulator modules are equipped with contact springs at the front panels. When replacing the modules, it is important that the springs remain undamaged. Even small openings in the front panel make the Cisco INA2320 sensitive to electrostatic discharge.
The Cisco INA2320 must be mounted with an air separation plate beneath it to meet the safety requirements. It is mandatory that the front edge of the air separation plate be equipped with a device collecting particles coming from the Cisco INA2320 mounted above the air separation plate.
For further instructions how to mount forced cooling devices and how to ventilate the Cisco INA2320 correctly, see the Cisco DVB INA2320 Installation and Configuration Guide.
To meet the temperature requirements, the Cisco INA2320 must be mounted with a fan tray above it to ensure forced cooling of the unit.
|Note Make sure that the fan tray secures air flow on all modules in the Cisco INA2320, that is, across the full width of the Cisco INA2320.|
When the INA2320 is configured from the terminal interface it is important that the host name is not equal to the Target name.
The following new hardware feature is supported by the Cisco INA2320 for Release 2.2a:
- Two IF amplifier modules added
The following new software feature is supported by the Cisco INA2320 for Release 2.2a:
- Support of 2 downstream channels
- MAC bridging support
- The Cisco INA2320 supports Llcsnap encapsulation for running with bridged and routed cable modems connected to the same Cisco INA2320.
- Support of C for automatic provisioning of CPE devices.
- Support of Out-of-Band operation according to the DVB ES 200 800 standard.
The alarm connector is not supported in the software release 2.2a.
Before performing a software upgrade it is recommended to save the current Cisco INA2320 configuration in a file. See Chapter 3, "To Save the INA Configuration in a File," of the Cisco DVB Interactive Network Adapter INA2320 Installation and Configuration Guide.
How to perform the software upgrade is described in Chapter 5, "Upgrading the INA Software," of the Cisco DVB Interactive Network Adapter INA2320 Installation and Configuration Guide.
When the Cisco INA2320 has loaded the new Software Release 2.2a, you can reload the previous configuration into the unit. See Chapter 3, "To Load the INA Configuration from a File," of the Cisco DVB Interactive Network Adapter INA2320 Installation and Configuration Guide.
The INA2320 is now operating with the new software and the unchanged individual settings.
Caveats describe unexpected behavior in the Cisco INA2320 Software Release 2.2a. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious. Severity 3 caveats are moderate caveats.
|Note If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. To reach Bug Navigator II, go to CCO and click Login. Then go to Software Center: Cisco IOS Software: Cisco Bugtool Navigator II. Another option is to go to http://www.cisco.com/support/bugtools.|
- Some MIB-II variables cannot be set from SNMP. These MIB variables are defined as write variables in the MIB file, but they cannot be changed:
- Multicast messages are not relayed from the HFC network to the Ethernet.
- Rebooting a PC connected to the INA by using the COM port causes a reboot of the Cisco DVB INA2320
- When rebooting a PC that is connected to the COM port of the INA2320, the PC can cause the Cisco DVB INA2320 to reboot.
- Workaround: Disconnect the cable to the com port before the PC is rebooted.
- The Cisco DVB INA2320 does not boot from an FTP server across a CISCO switch 5509.
- There are two possible workarounds:
- Set the Cisco DVB INA2320 to boot from Flash.
- Enable fast startup on the switch port connected to the Cisco DVB INA2320.
- Set the Cisco DVB INA2320 to boot from Flash.
- CSCdt41250 Out of order IP fragments (ping to Linux) NAT caveat
- If Network Address Translation is enabled in the Cisco DVB INA2320, IP fragments arriving out of order are be discarded. This happens if the first fragment is not received as the first packet.
All the caveats listed in this section are closed or resolved in Cisco INA2320 Software Release 2.2a.
- CSCdp80814 FTP performance not sufficient
- The Cisco INA2320 has a downstream limitation of approximately 16 Mbps. There is also a limitation on the upstream, where the Cisco INA2320 is limited to approximately 90% of the expected value.
- CSCdr26390 Spectral inversion ignored when changed.
- Spectral inversion is currently not supported. When the field is set by the management program, the spectral will not be inverted.
- CSCds19840 Not able to view log and connection stat entries.
- The connection and log table may disappear from the management program. This can be solved by rebooting the INA2320.
- CSCds30172 Setting demodulator RF input value to high values causes boot fatal
- If the input level is set to a value higher than 75 dB, the INA2320 will not boot. The workaround is to set the input level to a value less than 75 dB.
- CSCds30176 Lower demodulator RF input levels not supported by hardware
- The upstream power range for the Cisco INA2320 has changed from 58-75 dBmicroV to 44-83 dBmicroV, effective from software version 2.2. Also the power level calculation has been adjusted to match the actual physical power level on typical demodulators in a better way. Note that the upstream power level is not calibrated, it may vary by as much as 6 dB from the specified level.
|Note When upgrading the INA software from an earlier version than 2.2, the actual upstream power level will increase by approximately 8 dB, to more closely match the value given in the INA management program.|
- CSCds82919 When using QOS the modems gets 20% more data than specified
- The INA2320 grants 16% more bandwidth to each user than specified in the management program. Workaround: Set the maximum bandwidth 16% lower.
- CSCds82924 Softreboot can cause the INA to fail after a couple of hours (3 - 8 hours)
- This behavior is caused by a malformed check in the software. Workaround: Run a power cycle on the Cisco DVB INA2320.
These documents are available for the Cisco DVB INA2320 Interactive Network Adapter on CCO:
- Cisco DVB INA2320 Installation and Configuration Guide
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