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July 24, 2000
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Note You can find the most current Cisco IOS documentation on Cisco Connection Online (CCO). These electronic documents may contain updates and modifications made after this document was published. |
These release notes for the Cisco uBR910 series DSU describe the enhancements provided in Cisco IOS Release 12.1(3)T, which is an early deployment release based on 12.1 T. These release notes are updated as needed.
For a list of software caveats that apply to Release 12.1(3)T, see the "Caveats" section and the Caveats for Cisco IOS Release 12.1 T document. The caveats document is updated for every maintenance release and is located on Cisco Connection Online (CCO) and the Documentation CD-ROM.
Use these release notes with Cross-Platform Release Notes for Cisco IOS Release 12.1 T located on CCO and the Documentation CD-ROM.
These release notes describe the following topics:
The Cisco uBR910 series DSU connects to both the cable broadband network and to the access router that is serving as the gateway for the existing LAN. The access router continues to act as the gateway for the LAN, while the Cisco uBR910 series DSU sends the traffic between the access router and the cable network, performing the overhead required to maintain the data cable connection. This simplifies network administration and allows the access router to continue its current function with minimal configuration changes.
The Cisco uBR910 series DSU is based on the Data-Over-Cable Service Interface Specification (DOCSIS) and interoperates with any bidirectional, DOCSIS-qualified CMTS. In its connection with the CMTS, the Cisco uBR910 series DSU functions as a cable modem--a modulator/demodulator that conveys data communications over the cable television network.
The Cisco uBR910 series DSU functions as a DOCSIS 1.0 compliant cable modem in terms of its interoperation with the CMTS and cable network. However, it uses a serial interface to connect to a LAN, instead of using an Ethernet interface to connect to customer premises equipment (CPE) devices, as is the case with most cable modems.
The Cisco uBR910 series DSU connects to the access router through a serial interface compatible with the serial interfaces most commonly used in the Cisco 1600 series, Cisco 1700 series, Cisco 2500 series, Cisco 2600 series, and Cisco 3600 series routers. This allows the Cisco uBR910 series DSU to be easily integrated into existing networks.
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Note For information on new features and Cisco IOS commands supported by Release 12.1 T, see "New and Changed Information" section and "Related Documentation" section. |
In Cisco IOS Release 12.1(3)T, the Cisco uBR910 series includes the Cisco uBR914 cable DSU, a rack-mountable model with a field-replaceable router interface module. The Cisco uBR914 cable DSU includes the following features:
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Note The serial interface on the Cisco uBR910 series DSU can be connected only to a compatible serial interface on an access router that is acting as a LAN gateway. Cisco does not support connecting the Cisco uBR910 series DSU to a telco device such as a PBX or to a public switched network. |
These release notes describe the Cisco uBR910 series DSU for Cisco IOS Release 12.1(3)T, which is an early deployment (ED) release based on Cisco IOS Release 12.1. Early deployment releases contain fixes for software caveats and support for new Cisco hardware and software features.
Table 1 shows the available early deployment releases of the Cisco uBR910 series DSU.
| ED Release | Maintenance Release | New Hardware and Software Features | Availability |
|---|---|---|---|
Release 12.1 T | (3) |
| Now |
Release 12.1 XD or earlier releases | (1) |
| Now |
This section describes the system requirements for Cisco IOS Releases 12.1(3)T:
Table 2 lists the minimum memory that is recommended for the feature sets available for the Cisco uBR910 series DSU in Cisco IOS Release 12.1 T. The image subset legend for Table 2 is as follows:
| Feature Set Matrix Term | Image Name | Recommended Flash Memory | Recommended DRAM Memory | Runs From |
|---|---|---|---|---|
Base IP Bridging | ubr910-k1-mz | 8 MB Flash | 16 MB DRAM | RAM |
Base IP Routing | ubr910-k1y5-mz | 8 MB Flash | 16 MB DRAM | RAM |
If using DOCSIS concatenation with a 16 QAM symbol rate, the CMTS must be configured for Unique Word 16 in the preamble for both short and long data burst profiles. On the Cisco uBR7200 series universal broadband routers, use the cable modulation-profile global configuration command and specify uw16 for both the long and short modulation profiles. See caveats CSCdp76415 and CSCdp92139 for more detail.
Cisco IOS Release 12.1(3)T images support the Cisco DOCSIS 1.0+ Extensions, which include dynamic multi-SID assignment and concatenation. To use the dynamic multi-SID and concatenation features, both the Cisco uBR910 series DSU and the CMTS router must support them. If you are using the Cisco uBR7200 series universal broadband router as the CMTS router, Cisco IOS Release 12.0(7)XR, Release 12.1(1)T, or greater is required on the Cisco uBR7200 series router to activate these features.
To configure the Cisco uBR910 series DSU to support multiple classes of service, you can use the DOCSIS CPE Configurator tool, the Cisco Subscriber Registration Center (CSRC) network suite, or another DOCSIS configuration file editor of your choice. DOCSIS configuration files can define multiple classes of service (CoS) to support voice and other high-priority traffic flows. The first CoS is used for best-effort data and station maintenance traffic, and additional classes of service can be defined to give higher priority for other traffic flows.
The Cisco uBR910 Series includes the Cisco uBR914 DSU, which contains:
To determine the version of Cisco IOS software running on your Cisco uBR910 series DSU, log in to the Cisco uBR910 series DSU and enter the show version EXEC command:
router# show version Cisco Internetwork Operating System Software IOS (tm) 910 Software (ubr910-k1y5-mz), Version 12.1(3)T, RELEASE SOFTWARE
For technical information about upgrading to a new software release, see Cisco IOS Upgrade Ordering Instructions on CCO located at:
http://www.cisco.com/warp/public/620/6.html
For other information about upgrading to Cisco IOS Release 12.1, see the product bulletin Cisco IOS Software Release 12.1 Upgrade Paths and Packaging Simplification on CCO at:
Service & Support: Software Center: Cisco IOS Software: Product Bulletins: Software
Under Cisco IOS 12.1, click Cisco IOS Software Release 12.1 Ordering Procedures and Platform Support
Cisco IOS software is packaged in feature sets consisting of software images--depending on the platform. Each feature set contains a specific set of Cisco IOS features.
Table 3 lists the voice and data software images by feature sets for the Cisco uBR910 series DSU. This table uses the following conventions:
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Note These feature set tables might contain a selected list of features. These tables might not be cumulative--nor do they list all the features in each image. |
| Features | Base IP Bridging | Base IP Routing |
|---|---|---|
Baseline Privacy Interface (BPI) Encryption | Yes | Yes |
BPI+ Encryption | Yes | No |
Baseline Privacy Interface (BPI) MIB | Yes | Yes |
Cable Device MIB (RFC 2669) | Yes | Yes |
Cable Monitor | Yes | Yes |
Cisco Standard MIBs | Yes | Yes |
DHCP Server and Proxy Support | No | Yes |
DOCSIS 1.0+ Extensions (Dynamic multi-SID assignment and concatenation) | Yes | Yes |
DOCSIS-Compliant Bridging | Yes | Yes |
Easy IP | No | Yes |
Radio Frequency Interface MIB (RFC 2670) | Yes | Yes |
Routing (RIP V2) | No | Yes |
Secure Shell (SSH) support (client and server)--56-bit encryption | Yes | Yes |
The following sections list the new hardware and software features supported by the Cisco uBR910 series DSU.
There are no new hardware features supported by the Cisco uBR910 series DSU in Cisco IOS Release 12.1(3)T.
The following new software features are supported by the Cisco uBR910 series DSU for Release 12.1(3)T. For more information on these features, see the documentation listed in the "Related Documentation" section.
The HSRP Support for ICMP Redirects feature enables Internet Control Message Protocol (ICMP) redirection on interfaces configured with the Hot Standby Router Protocol.
When running HSRP, it is important to prevent hosts from discovering the interface (or real) MAC addresses of routers in the HSRP group. If a host is redirected by ICMP to the real MAC address of a router, and that router later fails, then packets from the host will be lost. Previously, ICMP redirect messages were automatically disabled on interfaces configured with HSRP.
This feature now enables ICMP redirects on interfaces configured with HSRP. This functionality works by filtering outgoing ICMP redirect messages through HSRP, where the next-hop IP address may be changed to an HSRP virtual IP address.
Cisco IOS Release 12.1(3)T adds support for the ip address dhcp command on the cable interface. Previous releases used the ip address negotiated command for this purpose, but this command is now reserved for the serial interface. This change is cosmetic only and does not change how the router obtains its IP address. See "IP Address Negotiation" section for additional information.
Cisco IOS Release 12.1(3)T enhances the Cisco uBR910 series DSU's support for the Secure Shell (SSH) protocol. The Cisco uBR910 series DSU supports SSH version 1, which allows network administrators to make a secure Telnet connection between the DSU and another TCP/IP device. SSH provides for authentication and encryption at the application layer, providing a secure connection even when BPI or IPSec authentication and encryption are not used at the network layer. By default, the SSH feature uses 56-bit DES encryption.
In Cisco IOS Release 12.1(3)T, SSH support includes the following features:
For configuration and other information, see the Secure Shell Version 1 Client feature module, available on CCO and the Documentation CD-ROM.
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Note SSH server support was introduced in Cisco IOS Release 12.1(1)XD. SSH client support and other enhancements were introduced in Cisco IOS Release 12.1(3)T. |
Cisco IOS Release 12.1(1)XD supports the following models of the Cisco uBR910 series cable data service unit (DSU):
The following new software features are supported by the Cisco uBR910 series DSU for Release 12.1(1)XD (or earlier releases). For more information on these features, see the documentation listed in the "Related Documentation" section.
The DOCSIS Baseline Privacy Interface (BPI) feature is based on the DOCSIS BPI Specification (SP-BPI-I02-990319 or later revision). It provides data privacy across the Hybrid Fiber-Coaxial (HFC) network by encrypting traffic flows between the Cisco uBR910 series DSU and the cable operator's CMTS.
The BPI+ (BPI Plus) feature is an enhancement to the BPI feature and is based on the DOCSIS BPI+ Specification (SP-BPI+-I04-000407 or later revision), which is still in development. In addition to the regular BPI features, BPI+ provides more secure authentication of cable modems through the use of digital certificates. Also, a cable modem can use a digital signature to verify that the software image it has downloaded has not been altered or corrupted in transit.
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Note Cisco IOS Release 12.1(3)T supports BPI encryption but not BPI+ encryption. The CMTS and Cisco uBR910 series DSU must both support and enable BPI to use its features. |
The Baseline Privacy Management Information Base (MIB), as currently defined, is available in Cisco IOS Release 12.1(3)T code. BPI allows an SNMP manager to monitor and manage the Cisco uBR910 series DSU's BPI configuration, including whether BPI is enabled, status of current authorization keys, current timeout values, real-time status counters, and additional information about authorization errors.
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Note The SNMP manager must load the DOCSIS-BPI-MIB.my MIB to access the BPI attributes. See the "Cable-Specific MIBs" section for details. |
The Cable Monitor is a web-based diagnostic tool to display the current status and configuration of the Cisco uBR910 series DSU. The Cable Monitor can also be used when the cable network is down, providing an easy way for subscribers to provide necessary information to service technicians and troubleshooters.
The DHCP server feature on the Cisco uBR910 series DSU includes both Intelligent DHCP Relay and DHCP Client functionality. A DHCP Relay Agent is any host that forwards DHCP packets between clients and servers--this enables the client and server to reside on separate subnets. If the Cisco uBR910 series DHCP server cannot satisfy a DHCP request from its own database, it can also act as a DHCP proxy agent by forwarding the DHCP request to one or more secondary DHCP servers.
DOCSIS-compliant bridging allows the Cisco uBR910 series DSU to operate as a DOCSIS 1.0 cable modem, so that it can interoperate with any DOCSIS-qualified CMTS. This is the default mode of operation for the Cisco uBR910 series DSU.
In addition to other QoS features, DOCSIS 1.1 supports a number of features that are required for the delivery of high quality voice traffic. To use these features before the DOCSIS 1.1 specification is finalized, Cisco has created the DOCSIS 1.0+ extensions that contain the most important of these features:
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Note Both the Cisco uBR910 series DSU and the CMTS must support the dynamic multi-SID and concatenation features for them to be used on the cable network. If you are using the Cisco uBR7200 series universal broadband router as the CMTS, Cisco IOS Release 12.0(7)XR or 12.1(1)T (or later) is required on the Cisco uBR7200 series router to use these features. |
Cisco IOS Release 12.1(3)T supports Cisco NetRanger, which is an Intrusion Detection System (IDS) composed of three parts:
Network address translation (NAT) and port address translation (PAT) frees a private network from needing a worldwide unique IP address for every computer connected to the Internet. Instead, the Cisco uBR910 series DSU translates the IP addresses used on the private network into a global IP address that can be used on the Internet. One IP address can be used for multiple computers because a unique port address identifies the individual computers on the private network.
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Note NAT and PAT are defined in Requests for Comments (RFC) 1631 . |
Quality of service (QoS) is a set of features that identify different types of traffic on a network so that certain types of traffic can be given higher priority than traffic that has only a "best effort" attempt at delivery. This feature is especially important for real-time traffic, such as voice traffic, where delays would have a serious impact on the traffic's usefulness.
Depending on the software image used, the Cisco uBR910 series DSU supports the following QoS features:
When configured for routing mode, the Cisco uBR910 series DSU supports the Routing Information Protocol Version 2 (RIPv2). In routing mode the Cisco uBR910 series DSU automatically configures itself to use the headend's IP address as its IP default gateway. This allows the Cisco uBR910 series DSU to send packets not intended for the private LAN to the headend for delivery to the Internet and other networks.
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Note The Cisco uBR910 series DSU supports only static routes and the RIP routing protocol. |
This section describes warnings and cautions about using Cisco IOS Release 12.1(3)T software.
The Cisco uBR910 series DSU interoperates with DOCSIS-compliant cable networks. Cisco IOS Release 12.1(3)T does not support bridging traffic across a non-DOCSIS cable network.
The DOCSIS specifications require that a cable modem obtain its IP address at power-on or reset from a DHCP server that is available through the cable interface. For this reason, the Cisco uBR910 series DSU defaults to a configuration that uses the ip address dhcp command for the cable interface. It is not possible to override this setting by specifying a specific static IP address; to assign a static IP address to the Cisco uBR910 series DSU, configure the DHCP server so that it assigns the desired IP address on the basis of the unit's MAC address.
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Note The ip address negotiated command cannot be used on the cable interface because this command is reserved exclusively for the serial interface. However, in Cisco IOS Release 12.1(3)T when the ip address dhcp command is used for cable interfaces, the configuration files still show the ip address negotiated command, which can generate an "invalid input" error during boot. This is only a cosmetic issue and does not affect the unit's functionality. See the description of caveat CSCdr61697, for more information. |
To enable BPI encryption, the Cisco uBR910 series DSU must use a Cisco IOS image that supports BPI encryption. If the current software image does not support BPI encryption (or if the current software image is corrupted), you must disable BPI encryption in the DOCSIS configuration file and reset the Cisco uBR910 series DSU before you will be able to download a new software image.
The MAX CPE parameter in a Cisco uBR910 series DSU's DOCSIS configuration file determines how many PCs (or other CPE devices) are supported when both the Cisco uBR910 series DSU and access router are operating in bridging mode. The default value for the MAX CPE parameter is 1, which means only one PC can access the cable network through the Cisco uBR910 series DSU when both the Cisco uBR910 series DSU and access router are operating in bridging mode.
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Note If either the Cisco uBR910 series DSU or access router are operating in routing mode, the MAX CPE parameter does not limit the number of CPE devices in the local network. See the "MAX CPE Parameter" section for more information. |
The DOCSIS 1.0 specification states that a CMTS cannot age-out MAC addresses for CPE devices, so the first PC connected to the Cisco uBR910 series DSU is normally the only one that the CMTS recognizes as valid. If a subscriber replaces an existing PC or changes its network interface card (NIC) to one that has a different MAC address, the CMTS will refuse to let the PC come online because this would exceed the maximum number of CPE devices specified by the MAX CPE parameter. A similar thing would happen if a user decides to move a PC from one Cisco uBR910 series DSU to another.
To allow a subscriber to replace an existing PC or NIC, the following workarounds are possible:
The reset switch on the back panel of the Cisco uBR910 series DSU is recessed to prevent accidental resets. To depress the switch, use a blunt object, such as a pen or pencil point; do not use a sharp object, such as a knife or awl, because this could damage the switch and the DSU's circuitry.
This section contains important information about using Cisco IOS Release 12.1(3)T software.
Access lists 100 and 101 should never be manually configured on the Cisco uBR910 series cable DSU because they are reserved by the DSU for internal purposes. Use access lists 102 through 199 instead.
In Cisco IOS Release 12.1(2)T and above, the docsDevCpeIpMax attribute defaults to -1 instead of the previous default of 1. This attribute controls the maximum number of CPE devices that can pass traffic through the Cisco uBR910 series DSU's serial interface as follows:
CPE IP address filtering is done as part of the following process:
1. MAC address filtering--Packets are filtered on the basis of the CPE device's MAC address. This is controlled by the value of the MAX CPE parameter, which is set in the DOCSIS configuration file.
2. Link Level Control (LLC) filtering--Packets are filtered on the basis of the packet's protocol. This is controlled by the docsDevFilterLLCTable table.
3. CPE IP address filtering--Packets are filtered on the basis of the CPE device's IP address, as controlled by the docsDevCpeIpMax attribute and docsDevFilterCpeTable table.
4. Access list filtering--Packets are filtered on the basis of access lists. IP filtering is controlled by the docsDevFilterIpTable table, and SNMP access filters are controlled by the docsDevNmAccessTable.
See the DOCS-CABLE-DEVICE-MIB.my MIB for more information on the attributes and tables listed above.
By default, the Cisco uBR910 series DSU enables its onboard TCP/IP "finger" server to allow remote users to query the number and identities of any users who are logged in to the router. Unless your network operations center (NOC) requires this service, it should be disabled to prevent denial of service attacks that access the finger server's well-known port (TCP port 79). To disable the finger server, include the no service finger command in the Cisco IOS configuration file that the router downloads at initial power-on.
The DOCSIS specification requires that the headend enforce the MAX CPE parameter, which specifies the maximum number of CPE devices that can connect to the cable network through a particular cable modem. However, because the Cisco uBR910 series DSU does not connect to CPE devices directly but instead connects to the subscriber LAN through an access router, the MAX CPE parameter behaves somewhat differently than with standard DOCSIS cable modems.
When the access router is configured as an IP router, it uses its own MAC address as the source address for all outgoing packets. Because the MAX CPE parameter distinguishes CPE devices by MAC address, a value of 1 for the MAX CPE parameter is sufficient for any number of computers in the subscriber network because the access router's MAC address is used for all CPE devices in that network.
The MAX CPE parameter is enforced, through, when both the Cisco uBR910 series DSU and access router are operating in IP bridging mode. In this situation, outgoing packets are transmitted with the CPE devices' original MAC addresses, and the MAX CPE parameter must be set to a high enough value to allow access for all CPE devices on the subscriber network. If MAX CPE is set too low, some devices on the subscriber network will not be able to access the cable network.
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Note The Cisco uBR910 series supports a maximum of 254 CPE devices in bridging mode. |
The Cisco uBR910 series DSU supports a maximum serial interface speed of up to 8 Mbps, depending on the maximum speed supported by the connected access router. Table 4 lists the maximum speeds for the WIC serial interfaces supported by specific Cisco access routers; for other access routers, see their documentation for details.
| Cisco Access Router | Maximum Supported WIC Interface Speed |
|---|---|
Cisco 805 | 512 Kbps |
Cisco 1600 series | 2 Mbps |
Cisco 1700 series | 2 Mbps |
Cisco 2500 series | 2 Mbps |
Cisco 2600 series | 2 Mbps--8 Mbps (depending on slot used)1 |
Cisco 3600 series | 2 Mbps--8 Mbps (depending on slot used)1 |
| 1See the product literature for the Cisco 2600 series and Cisco 3600 series , available on CCO, for more details. |
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Note The maximum serial interface speed does not guarantee a maximum throughput rate for traffic sent across the cable network. The actual throughput depends on the capabilities of the connected access router and cable network, as well as any bandwidth restrictions imposed by the CMTS. |
The Cisco uBR910 series DSU supports the following categories of MIBs:
The Cisco uBR910 series DSU supports the Cable Device MIB, which is defined by RFC 2669 and describes DOCSIS-compliant cable modems and CMTS. The Cable Device MIB records statistics related to the configuration and status of the cable modem. Statistics include an events log and device status. The following list details the components of the Cable Device MIB:
The Cable Device MIB is very similar to the RFI MIB in that both allow access to cable-related statistics. However, the Cable Device MIB provides statistics on the cable modem, and the RFI MIB provides statistics on the radio frequency transmissions over the cable television line.
The Cisco uBR910 series DSU supports the Cisco Standard MIBs, which consist of the following components:
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Note The Cisco Management Information Base (MIB) User Quick Reference publication is no longer published. For the latest list of MIBs supported by Cisco, see the Cisco Network Management Toolkit on Cisco Connection Online (CCO). From the CCO home page, click on this path: Service & Support: Software Center: Network Mgmt Products: Cisco Network Management Toolkit: Cisco MIB |
The Cisco uBR910 series DSU supports the Radio Frequency Interface (RFI) MIB. The RFI MIB module is defined in RFC 2670 and describes DOCSIS-compliant radio frequency interfaces in cable modems and CMTS. On the cable modem, RFI MIB entries provide:
The RFI MIB includes tables describing both the CMTS and the cable modem side of the cable interface. All cable modem tables are implemented.
Table 5 shows the cable-specific MIBs that are supported on the Cisco uBR910 series DSU. This table also provides a brief description of each MIB's contents and the Cisco IOS software release in which the MIB was initially functional--earlier releases might have had unsupported prototype versions of the MIB; later releases might have added new attributes and functionality.
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Note The names given in Table 5 are the filenames for the MIBs as they exist on Cisco's FTP site (ftp://ftp.cisco.com/pub/mibs or http://www.cisco.com/public/mibs ). Most MIBs are available in both SNMPv1 and SNMPv2 versions; the SNMPv1 versions have V1SMI as part of their filenames. Also see the Cisco MIBs home page at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml. |
| MIB Filename | Description | Release |
|---|---|---|
This module specifies the Structure of Management Information (SMI) for SNMPv2, as defined in RFC 1902. | 12.1(1)XD | |
This module defines the textual conventions as specified in pages 4, 10-11 of RFC 854. | 12.1(1)XD | |
This module specifies the Structure of Management Information (SMI) for Cisco's enterprise MIBs. | 12.1(1)XD | |
This module defines the textual conventions used in Cisco's enterprise MIBs. | 12.1(1)XD | |
This module describes generic objects for the Layer 3 network interface sublayers. This MIB is an updated version of MIB-II's if table, and incorporates the extensions defined in RFC 1229. | 12.1(1)XD | |
This module describes the spectrum management flap list attributes. | 12.1(1)XD | |
This module describes the DOCSIS-compliant Radio Frequency (RF) interfaces in cable modems and cable modem termination systems, as described in RFC 2670. | 12.1(1)XD | |
This module describes the attributes for the DOCSIS-specified Baseline Privacy Interface (BPI) on cable modems and the CMTS. | 12.1(1)XD | |
This module extends the DOCSIS standard RFI MIB (DOCS-IF-MIB) with Cisco-specific extensions, such as QoS attributes and connection status and other information regarding the cable modems and CPE devices supported by the CMTS. | 12.1(1)XD | |
This module was previously known as the CABLE-DEVICE-MIB and contains cable-related objects for DOCSIS-compliant cable modems, as specified in RFC 2669. | 12.1(1)XD |
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Note Because of interdependencies, the MIBs must be loaded in the order given in Table 5. |
A number of Cisco-provided MIBs have been replaced with more scalable, standardized MIBs; these MIBs have filenames that start with "OLD" and first appeared in Cisco IOS Release 10.2. The functionality of these MIBs has already been incorporated into replacement MIBs, but the old MIBs are still present to support existing Cisco IOS products or NMS applications. However, because the deprecated MIBs will be removed from support in the future, you should update your network management applications and scripts to refer to the table names and attributes that are found in the replacement MIBs.
Table 6 shows the deprecated MIBs and their replacements. In most cases, SNMPv1 and SNMPv2 replacements are available, but some MIBs are available only in one version. A few of the deprecated MIBs do not have replacement MIBs; support for these MIBs will be discontinued in a future release of Cisco IOS software.
| Deprecated MIB | Replacement MIBs | |
|---|---|---|
| SNMPv1 MIB | SNMPv2 MIB | |
-- | ||
-- | ||
-- | -- | |
-- | -- | |
-- | ||
(Compilation of other OLD* MIBS) | ||
-- | -- | |
-- | -- | |
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Note Some of the MIBs listed in Table 6 represent feature sets that are not supported on the Cisco uBR910 series DSU. |
Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.
This section contains open and resolved caveats for Cisco IOS Release 12.1(3)T. All caveats in Release 12.1 and Release 12.1 T are also in Release 12.1(3)T.
For information on caveats in Cisco IOS Release 12.1 and Release 12.1 T, see Caveats for Cisco IOS Release 12.1 , which lists severity 1 and 2 caveats, and is located on CCO and the Documentation CD-ROM.
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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 press 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 (you must have an account on CCO to access this site). |
All the caveats listed in this section are open in Release 12.1(3)T for the Cisco uBR910 series DSU:
copy startup-config flash: copy flash:startup-config startup-config
copy startup-config bootflash: copy bootflash:startup-config startup-config
All the caveats listed in this section are closed or resolved in Release 12.1(3)T for the Cisco uBR910 series DSU:
no ip http server
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Note Although CSCdr36952 has been resolved in Release 12.1(3)T, the Cisco web server should still be disabled using the no ip http server command. See CSCdr31347 in the previous section for more information. |
ip route 209.165.201.0 225.255.255.224 int c2/0
ip route 209.165.201.0 225.255.255.224 192.168.100.1
The following sections describe the documentation available for the Cisco uBR910 series DSU. These documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, feature modules, and other documents.
Most documentation is available as printed manuals or electronic documents, except for feature modules and select manuals, which are available online on CCO and the Documentation CD-ROM.
Use these release notes with these documents:
The following documents are specific to Release 12.1 and are located on CCO and the Documentation CD-ROM:
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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 press 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 (you must have an account on CCO to access this site). |
These documents are available for the Cisco uBR910 series DSU on CCO and the Documentation CD-ROM:
On CCO at:
Technical Documents: Documentation Home Page: Cisco Product Documentation: Broadband/Cable Solutions: Cisco uBR900 Series Cable Access Routers
On the Documentation CD-ROM at:
Cisco Product Documentation: Broadband/Cable Solutions: Cisco uBR900 Series Cable Access Routers
Feature modules describe new features supported by Release 12.1, and are updates to the Cisco IOS documentation set. A feature module consists of a brief overview of the feature, benefits, configuration tasks, and a command reference. As updates, the feature modules are available online only. Feature module information is incorporated in the next printing of the Cisco IOS documentation set.
On CCO at:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation
The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents that are available in electronic form on the Documentation CD-ROM and CCO, as well as separately orderable in printed versions.
Each module in the Cisco IOS documentation set consists of two books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, Cisco IOS software functionality, and contain comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference.
On CCO and the Documentation CD-ROM, two master hot-linked documents provide information for the Cisco IOS software documentation set.
On CCO at:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References
Table 7 describes the contents of the Cisco IOS Release 12.1 software documentation set, which is available in electronic form and in printed form upon request.
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Note You can find the most current Cisco IOS documentation on CCO and the Documentation CD-ROM. These electronic documents may contain updates and modifications made after the hard-copy documents were printed. |
On CCO at:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1
| Books | Major Topics |
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| Configuration Fundamentals Overview |
| Transparent Bridging |
| Preparing for Dial Access |
| Interface Configuration Overview |
| IP Overview |
| AppleTalk and Novell IPX Overview |
| Overview |
| Multiservice Applications Overview |
| Quality of Service Overview |
| Security Overview |
| Cisco IOS Switching Services Overview |
| Introduction: Wide-Area Networking Overview |
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Note Cisco Management Information Base (MIB) User Quick Reference is no longer published. If you have an account with CCO, you can find latest list of MIBs supported by Cisco. To reach the Cisco Network Management Toolkit, press Login at CCO and go to Software Center: Network Mgmt Products: Cisco Network Management Toolkit: Cisco MIB. |
You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Registered CCO users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/cgi-bin/subcat/kaojump.cgi.
Nonregistered CCO users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).
Cisco provides Cisco Connection Online (CCO) as a starting point for all technical assistance. Warranty or maintenance contract customers can use the Technical Assistance Center. All customers can submit technical feedback on Cisco documentation using the web, e-mail, a self-addressed stamped response card included in many printed documents, or by sending mail to Cisco.
Cisco continues to revolutionize how business is done on the Internet. Cisco Connection Online is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.
CCO's broad range of features and services helps customers and partners to streamline business processes and improve productivity. Through CCO, you will find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online support services, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.
Customers and partners can self-register on CCO to obtain additional personalized information and services. Registered users may order products, check on the status of an order and view benefits specific to their relationships with Cisco.
You can access CCO in the following ways:
You can e-mail questions about using CCO to cco-team@cisco.com.
The Cisco Technical Assistance Center (TAC) is available to warranty or maintenance contract customers who need technical assistance with a Cisco product that is under warranty or covered by a maintenance contract.
To display the TAC web site that includes links to technical support information and software upgrades and for requesting TAC support, use www.cisco.com/techsupport.
To contact by e-mail, use one of the following:
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In North America, TAC can be reached at 800 553-2447 or 408 526-7209. For other telephone numbers and TAC e-mail addresses worldwide, consult the following web site: http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.
If you have a CCO login account, you can access the following URL, which contains links and tips on configuring your Cisco products:
This URL is subject to change without notice. If it changes, point your Web browser to CCO, press Login, and click on this path: Technical Assistance Center: Technical Tips.
The following sections are provided from the Technical Tips page:
If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.
You can e-mail your comments to bug-doc@cisco.com.
To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:
Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883
We appreciate and value your comments.
Posted: Thu Aug 17 14:35:23 PDT 2000
Copyright 1989-2000©Cisco Systems Inc.