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February 28, 2000
These release notes for the Cisco uBR7200 series universal broadband routers describe the enhancements provided in Cisco IOS Release 12.0(9)SC, which is an early deployment release that provides a stable platform for cable products with essential new features and fixes to software caveats. These release notes are updated as needed to describe memory requirements, new features, new hardware support, software platform deferrals, and related documents.
For a list of the software caveats that apply to Release 12.0(9)SC, see the "Caveats" section.
These release notes describe the following topics:
The Cisco uBR7200 series universal broadband routers---the Cisco uBR7223, the Cisco uBR7246, and the Cisco uBR7246 VXR---are based on the Data Over Cable Service Interface Specification (DOCSIS) standards. Each is designed to be installed at a cable operator's headend facility or distribution hub and to function as the cable modem termination system (CMTS) for subscriber-end devices such as Cisco uBR904 and Cisco uBR924 cable access routers, and other DOCSIS-based cable modems and set-top boxes (STBs).
Cisco uBR7200 series universal broadband routers allow two-way transmission of digital data and Voice over IP (VoIP) traffic over a hybrid fiber coaxial (HFC) network. For cable plants not fully upgraded to support two-way cable transmission, the routers support DOCSIS-compliant telco return, where the cable modem's return path to the CMTS is via a dial-up telephone line connection instead of an upstream channel over the coaxial cable.
The CISCO uBR7200 series routers support IP routing with a wide variety of protocols and combinations of Ethernet, Fast Ethernet, Gigabit Ethernet, serial, High-Speed Serial Interface (HSSI), Packet over SONET (POS) OC-3 and OC-12c, and Asynchronous Transfer Mode (ATM) media. Additional protocols and media may be added as they become available for the Cisco uBR7200 series routers.
The Cisco uBR7246 features an I/O controller, up to two network interface port adapters, up to four cable modem cards, a high-performance network processing engine, and up to two removable power supplies providing load-sharing and redundancy capabilities. The Cisco uBR7246 VXR provides two PCMCIA slots that allow for software upgrades through the use of Flash memory cards.
The Cisco uBR7246 features an I/O controller, up to two network interface port adapters, up to four cable modem cards, a network processing engine, and up to two removable power supplies, providing load-sharing and redundancy capabilities. The Cisco uBR7246 provides two PCMCIA slots that allow for software upgrades through the use of Flash memory cards.
The Cisco uBR7223 features an I/O controller, one network interface port adapter, up to two cable modem cards, a network processing engine, and a removable power supply. (The Cisco uBR7223 does not feature load-sharing and redundant power supply capability like the Cisco uBR7246 and Cisco uBR7246 VXR.) The Cisco uBR7223 provides two PCMCIA slots that allow for software upgrades through the use of Flash memory cards.
The Cisco uBR7223 is a cost-effective, scalable interface between subscriber cable modems and the backbone data network, and is designed specifically for small to medium network installations.
These release notes describe the Cisco uBR7200 series universal broadband routers for Cisco IOS Release 12.0(9)SC. Release 12.0 SC is an early deployment (ED) release based on Release 12.0; early deployment releases contain fixes to software caveats, as well as support for new Cisco hardware and software features. Table 1 shows Release 12.0 SC early deployment releases.
| ED Release | Additional Software Features1 | Additional Hardware Features | Availability |
|---|---|---|---|
Release 12.0(9)SC |
| None | |
Release 12.0(8)SC1 | Bug fixes | None | |
Release 12.0(8)SC All 12.0(8)SC release images have been deferred. Please refer to Important Notes. | Cable Interface Bundling | MC16E Cable Modem Card |
|
Release 12.0(7)SC | None |
| Now 12/1999 1/2000 |
Release 12.0(6)SC |
|
| Now |
| 1Only major features are listed. See the Release Notes for each particular release for a comprehensive feature list. |
This section describes the system requirements for Release 12.0(9)SC:
Table 2 displays the memory requirements of the Cisco IOS feature sets for the Cisco uBR7200 series universal broadband routers for Cisco IOS Release 12.0(9)SC. Cisco uBR7200 series universal broadband routers are available with a 16- or 20-MB Type II PCMCIA Flash memory card.
| Feature Set | Image Name | Required Flash Memory | Required DRAM Memory | Runs From | Feature History |
|---|---|---|---|---|---|
DOCSIS 2-WAY | ubr7200-p-mz | 16 MB Flash | 64 MB DRAM | RAM | Added in Cisco IOS Release 12.0(6)SC |
DOCSIS 2-WAY IP+ | ubr7200-ps-mz | 16 MB Flash | 64 MB DRAM | RAM | Added in Cisco IOS Release 12.0(6)SC |
DOCSIS 2-WAY W/BPI | ubr7200-klp-mz | 16 MB Flash | 64 MB DRAM | RAM | Added in Cisco IOS Release 12.0(6)SC |
DOCSIS 2-Way IP+ W/BPI | ubr7200-klps-mz | 16 MB Flash | 64 MB DRAM | RAM | Added in Cisco IOS Release 12.0(6)SC |
The image subset legend for Table 2 is as follows:
This section clarifies the operation of certain features in the Cisco uBR7200 series universal broadband routers:
Cisco IOS Release 12.0(9)SC supports the following Cisco uBR7200 series universal broadband routers:
In addition to the currently supported network processing engines (NPE), Cisco IOS Release 12.0(9)SC also supports the NPE-300 card, which has an R7000 microprocessor that operates at an internal clock speed of 262 MHz (currently supported only on the Cisco uBR7426 VXR).
Cisco IOS Release 12.0(9)SC supports the following cable modem cards:
Table 3 lists and describes the port adapters supported by Cisco uBR7200 series routers in Cisco IOS Release 12.0(9)SC.
| Product Number1 | Description | Platforms Supported | In2 Cisco IOS Release |
|---|---|---|---|
| ATM | |||
1-port ATM OC-3c/STM-1 single-mode intermediate reach port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1-port ATM OC-3c/STM-1 multimode port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
PA-A2-4E1XC-OC 3SM | 5-port ATM CES3 (4 E1 120-ohm CBR4 ports and 1 OC-3 ATM single-mode port) port adapter | Cisco uBR7246 | Cisco IOS Release 12.0(6)SC |
5-port ATM CES3 (4 E1 120-ohm CBR4 ports and 1 E3 ATM port) port adapter | Cisco uBR7246 | Release 12.0(6)SC | |
5-port ATM CES3 (4 T1 CBR4 ports and 1 OC-3 ATM single-mode port) port adapter | Cisco uBR7246 | Release 12.0(6)SC | |
5-port ATM CES3 (4 T1 CBR4 ports and 1 T3 ATM port) port adapter | Cisco uBR7246 | Release 12.0(6)SC | |
1-port E3 ATM, PCI5-based port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1-port T3 ATM, PCI-based port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1-port OC-3c/STM-1 multimode port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
1-port OC-3c/STM-1 single-mode, intermediate reach port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
1-port OC-3c/STM-1 single-mode, long reach port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
| Ethernet | |||
4-port Ethernet 10BaseT port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
8-port Ethernet 10BaseT port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
1-port 100BaseTX Fast Ethernet port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
1-port 100BaseFX Fast Ethernet port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
2-port 100BaseTX Fast Ethernet port adapter with token-ring Inter-Switch Link (ISL) support | Cisco uBR7200 series routers | Release 12.0(6)SC | |
2-port 100BaseFX Fast Ethernet port adapter with token-ring Inter-Switch Link (ISL) support | Cisco uBR7200 series routers | Release 12.0(6)SC | |
12-port 10BaseT and 2-port 10/100BaseTX port adapter | Cisco uBR7246 | Release 12.0(6)SC | |
1-port IEEE 802.3z Gigabit Ethernet port adapter | Cisco uBR7246 VXR only | Release 12.0(7)SC | |
| High-Speed Serial Interfaces (HSSI) | |||
1-port HSSI port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
2-port HSSI port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
| Packet over SONET (POS) | |||
1-port POS OC-3 (STM-3c,STM-1/SDH) single-mode, long reach port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
1-port POS OC-3 (STM-3c,STM-1/SDH) single-mode, intermediate reach port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
1-port POS OC-3 (STM-3c,STM-1/SDH) multimode port adapter | Cisco uBR7200 series routers | Release 12.0(6)SC | |
| Dynamic Packet Transport (DPT) | |||
2-port OC-12c (STM4c) single-mode fiber, long reach DPT port adapter | Cisco uBR7246, Cisco uBR7246 VXR | Release 12.0(7)SC and later 12.0 SC releases | |
PA -SRP-OC12SMI | 2-port OC-12c (STM4c) single-mode fiber, intermediate reach DPT port adapter | Cisco uBR7246, Cisco uBR7246 VXR | Release 12.0(7)SC and later 12.0 SC releases |
PA -SRP-OC12MM | 2-port OC-12c (STM4c) multimode fiber DPT port adapter | Cisco uBR7246, Cisco uBR7246 VXR | Release 12.0(7)SC and later 12.0 SC releases |
| Serial | |||
4-port synchronous serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
8-port EIA/TIA-232 synchronous serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
8-port V.35 synchronous serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
8-port X.21 synchronous serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
4-port unbalanced (75-ohm) E1-G.703/G.704 synchronous serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
4-port balanced (120-ohm) E1-G.703/G.704 synchronous serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1-port E3 serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1-port T3 serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
2-port E3 serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
2-port T3 serial port adapter | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1 multichannel E3, medium-speed serial interface | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1 multichannel T3 interface with BNC connectors | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1 multichannel DS1/PRI with 4 T1 interfaces (RJ-48C connectors) | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1 multichannel DS1/PRI with 8 T1 interfaces (RJ-48C connectors) | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
1 multichannel E1/PRI with 8 E1 interfaces (RJ-48C connectors) | Cisco uBR7223, Cisco uBR7246 | Release 12.0(6)SC | |
| 1Refer to the Documentation CD-ROM or http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com for the most current list of supported port adapters. 2The number in the "In" column indicates the Cisco IOS release when the interface was first introduced. 3CES = circuit emulation services. 4CBR = constant bit rate. 5PCI = Peripheral Component Interconnect. |
To determine the version of Cisco IOS software running on the Cisco uBR7200 series universal broadband router, log in to the router and enter the show version EXEC command:
router> show version Cisco Internetwork Operating System Software IOS (tm) ubr7200 Software (ubr7200-p-mz), Version 12.0(9)SC, RELEASE SOFTWARE
For information on upgrading to a new software release, see the Cisco IOS Software Release 12.0S Ordering Procedures product bulletin located on CCO at:
Service & Support: Software Center: Cisco IOS Software: Product Bulletins: Software
Under Cisco IOS 12.0, click Cisco IOS Software Release 12.0T (#819:0999). This document can also be found on CCO at http://www.cisco.com/warp/public/cc/cisco/mkt/ios/rel/120/prodlit/819_pp.htm. (You must have an account on CCO to access this URL.)
Cisco IOS software is packaged in software images consisting of feature sets---depending on the platform. Each feature set contains a specific set of Cisco IOS features.
 | Caution Cisco IOS images with strong encryption (including, but not limited to, 168-bit [3DES] data encryption feature sets) are subject to United States government export controls and have limited distribution. Strong encryption images to be installed outside the United States may require an export license. Customer orders may be denied or subject to delay due to United States government regulations. When applicable, the purchaser or user must obtain local import and use authorizations for all encryption strengths. Contact your sales representative or distributor for more information, or send an e-mail to export@cisco.com. |
Table 4 lists only the cable-specific features and feature sets, with the exception of MIBs, supported by the Cisco uBR7200 series in Cisco IOS Release 12.0 SC and uses the following conventions:
| Feature | Feature Set | ||||
|---|---|---|---|---|---|
| In1 | DOCSIS 2-WAY | DOCSIS 2-WAY W/BPI | DOCSIS 2-WAY IP+ | DOCSIS 2-WAY IP+ W/BPI | |
| IP Routing | |||||
| (6) | Yes | Yes | Yes | Yes |
| Management | |||||
| (6) | Yes | Yes | Yes | Yes |
| (6) | Yes | Yes | Yes | Yes |
| (6) | Yes | Yes | Yes | Yes |
| (6) | Yes | Yes | Yes | Yes |
| (6) | Yes | Yes | Yes | Yes |
| (9) | Yes | Yes | Yes | Yes |
| (9) | Yes | Yes | Yes | Yes |
| Operations | |||||
| (9) | Yes | Yes | Yes | Yes |
| Quality of Service | |||||
| (6) | Yes | Yes | Yes | Yes |
| (6) | Yes | Yes | Yes | Yes |
| (6) | Yes | Yes | Yes | Yes |
| (6) | Yes | Yes | Yes | Yes |
| (6) | Yes | Yes | Yes | Yes |
| (6) | Yes | Yes | Yes | Yes |
| Security | |||||
| (6) | No | Yes | No | Yes |
| (6) | Yes | Yes | Yes | Yes |
The following sections list the new hardware and software features supported by the Cisco uBR7200 series routers for Cisco IOS Release 12.0 SC. For a complete list of hardware and software features, listed by the release in which they first appeared, see Release Notes for Cisco uBR7200 Series for Cisco IOS Release 12.0 T.
There are no new hardware features supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(9)SC.
The following new software features are supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(9)SC.
Cisco uBR7200 series Routers supports the required objects in RFC 2665 for DOCSIS OSSI compliance now.
Cisco uBR7200 series Routers supports the required objects in RFC 2233 for DOCSIS OSSI compliance now.
When an existing cable modem is swapped with a new one, such as a field replacement, the MAC address for the PC will be associated with the old cable modem. This could also happen if a PC is moved from one cable modem to another.
There are no new hardware features supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(8)SC1.
There are no new software features supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(8)SC1.
The following new hardware features are supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(8)SC.
The MC16E cable modem card provides one downstream and six upstream connections to the cable network, similar to the MC16C cable modem card, except that it supports the ITU J.83 Annex A physical layer and the proposed EuroDOCSIS (Annex A) standard (Cable Labs ECR RFI-R-98036). The MC16E card has the following differences with the current MC16C card:
The following new software features are supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(8)SC.
The following defect has caused all images in the Cisco IOS Release 12.0(8)SC to be deferred:
To prevent this potential hazard to customer networks, Cisco Systems Inc. has deferred and removed the affected images from CCO.
If you already have this image in your network, please replace it with images from the Cisco IOS Release 12.0(8)SC1 release, currently available on CCO.
For questions regarding this notice, please contact Jeff Kerr, Program Manager.
Cable interface bundling allows a service provider to share one IP subnet across multiple cable interfaces that are grouped into a cable interface bundle. All of the cable interfaces on a Cisco uBR7200 series universal broadband router can be grouped into a single bundle so that only one subnet is required for each router. This eliminates the requirement that a separate IP subnet be used for each individual cable interface. This in turn avoids the performance, memory, and security problems that would result if a bridging solution were used to manage the subnets, especially for a large number of subscribers.
Two new Cisco IOS interface commands implement this feature:
The following new hardware features are supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(7)SC.
The IEEE 802.3z Gigabit Ethernet Port Adapter (PA-GE) is a single-port adapter that provides a full-duplex, IEEE 802.3z compliant Gigabit Ethernet (GE) interface. The PA-GE is supported on the Cisco uBR7246 VXR universal broadband router; it is not supported on the Cisco uBR7223 and Cisco uBR7246 routers.
The PA-GE port adapter supports the following IEEE 802.3z interfaces:
In addition to the previously supported network processing engines (NPE), Cisco IOS Release 12.0(7)SC or later images support the NPE-300 card. The NPE-300 has an RM7000 RISC microprocessor that operates at an internal clock speed of 262 MHz. The microprocessor has three levels of cache: a primary cache (32 KB, divided equally between instruction and data) and a secondary unified cache (256 KB, used for both data and instructions) that are internal to the microprocessor, and a third external cache (2 MB) that provides additional high-speed storage for both data and instructions.
The NPE-300 uses SDRAM (64 MB to 256 MB) for code, data, and packet storage. The card boots from its onboard Boot ROM (512 KB), so it does not require an upgrade to the Boot ROM on the I/O controller.
 | Caution The NPE-300 card is supported only on the Cisco uBR7246 VXR chassis when using Cisco IOS Releases 12.0(7)SC or later SC images. Also, the NPE-300 card does not support the original MC11-FPGA modem card, so you must use the MC11C modem card or other current modem card (see "Cable Modem Cards" section). |
For information on replacing the network processing engine, see Network Processing Engine Replacement Instructions , available on CCO and the Documentation CD-ROM.
The OC-12c dynamic packet transport (DPT) port adapters are dual-width OC-12c port adapters that provide a shared IP over SONET capability. The DPT port adapter are available in three models (multimode fiber; single-mode fiber, intermediate reach; and single-mode fiber, long reach).
The DPT port adapters provide the Cisco uBR7246 universal broadband router with two SC duplex ports. Each SC duplex port provides the physical connection to a device in a SONET OC-12 DPT ring. DPT rings can also be connected to SONET add-drop multiplexers (ADMs), thus allowing for the creation of small or very large DPT rings.
Cisco IOS Release 12.0(7)SC or later images support the Cisco uBR7246 VXR chassis, a high-performance platform that contains four slots for cable modem cards, two port adapter slots (supporting either two single-width or one dual-width port adapter), one slot for an input/output (I/O) controller card, and one slot for the NPE-300 high-performance network processing engine (NPE). An additional slot is available for a national clock card (which is not yet released). The Cisco uBR7246 VXR also supports dual power supplies; the second power supply is optional but provides redundancy and load-sharing capabilities.
There are no new software features supported by the Cisco uBR7200 series in Cisco IOS Release 12.0(7)SC.
The following new cable modem cards are supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(6)SC.
The software for the MC12C and MC14C cable modem cards is a driver running on the Cisco uBR7200 series universal broadband routers. Using a Protocol Control Information (PCI) interface, the universal broadband router line card software interacts with the cable modem card. Data is passed back and forth, as direct memory access (DMA) transfers, from the Cisco uBR7200's memory to the cable modem card.
Additionally, the MC12C and MC14C cable modem cards support universal broadband router line card management and control with the modem card Management Information Bases (MIBs), Media Access Control (MAC) control software, and logical link management software based on DOCSIS standards.
The MC16B cable modem card is available for the Cisco uBR7200 series universal broadband router. The software for the MC16B modem card is a driver running on the router and interacts with the card using a PCI interface. Data is passed back and forth, using direct memory access (DMA) transfers, from the Cisco uBR7200 memory to the MC16B card.
Additionally, the MC16B card supports universal broadband router line card management and control with the MC16 MIB, MAC control software, and logical link management software based on MCNS standards.
For more information, refer to the Update to the Cisco uBR7200 Series Cable Modem Card Installation and Configuration for the MC16B EFT Card publication.
The software for the MC16C cable modem card is a driver running on the Cisco uBR7200 series universal broadband routers. Using a Protocol Control Information (PCI) interface, the universal broadband router line card software interacts with the MC16C cable modem card. Data is passed back and forth, as direct memory access (DMA) transfers, from the Cisco uBR7200's memory to the MC16C cable modem card.
Additionally, the MC16C cable modem card supports line card management and control with the MC16C MIB, Media Access Control (MAC) software, and logical link management software based on DOCSIS standards.
For more information, refer to the Cisco uBR7200 Series Cable Modem Card Installation and Configuration and Update to the Cisco uBR7200 Series Cable Modem Card Installation and Configuration for the MC16C Cards publications.
The following new software features are supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(6)SC.
Cisco uBR7200 series universal broadband routers now include support for the DOCSIS Baseline Privacy Interface (BPI) MIB. This allows an SNMP manager to monitor and manage the router'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.
This feature allows Cisco uBR7200 series universal broadband routers to change the downstream frequency for any or all cable modems, overriding the DOCSIS configuration file settings.
The Cisco uBR7200 series universal broadband routers contain the following additional or changed show commands:
For each modulation/burst profile configuration, Cisco uBR7200 series universal broadband routers will support burst profile number, burst profile interval usage code, burst type, preamble length and unique word length, differential encoding enable/disable, forward error correction (FEC) correctable bytes value, FEC code word length, scrambler seed value, maximum burst size, guard time size, last code word shortened/lengthened, and scrambler enable/disable.
This feature---also known as the Customer Premises Equipment (CPE) Limitation---allows Cisco uBR7200 series universal broadband routers to report and limit the number of CPEs that can use the cable modem to access the cable network.
This feature---also known as Cable Modem and Host Subnet Addressing---allows the Cisco uBR7200 series universal broadband router to set the GIADDR field of DHCPDISCOVER and DHCPREQUEST packets with a Relay IP address to help automate the provisioning of cable modems on systems that use multiple IP subnets. The cable dhcp-giaddr [policy | primary] command enables this feature on a per-interface basis.
The Cisco uBR7200 series universal broadband routers support quality of service (QoS) as defined by the DOCSIS 1.0 specification. Service class profiles can be configured through the command-line interface to support the QoS profile number, traffic priority, maximum upstream bandwidth, guaranteed upstream bandwidth, maximum downstream bandwidth, maximum transmit burst length, baseline privacy enable/disable, and type of service (ToS) overwrite byte.
QoS Profile Enforcement allows cable modem termination system (CMTS) operators to control the QoS to eliminate any interference from improper local-rate limiting implemented on the cable modem. The CMTS provisions a registering cable modem with a default DOCSIS 1.0 service class assigned by the operator, overriding any service class that previously existed on the modem. This service class has no upstream or downstream rate limits, so that the CMTS can do traffic shaping based on the QoS profile enforced by the operator.
The following commands are available on Cisco uBR7200 series universal broadband routers to update the QoS table:
This feature allows all cable modems in an HFC network to identify themselves via unique downstream channel IDs instead of their downstream frequencies.
Cisco uBR7200 series routers support downstream data rate shaping on a per modem basis. The Type of Service (ToS) bits in the IP packet header can be set to specify that packet's class of service, allowing packets for certain traffic flows (such as VoIP) to be given precedence over packets for other flows (such as data).
Downstream rate shaping with ToS bits allows you to configure multiple data rates for a given modem. Also, by specifying a maximum data rate for a particular ToS, you can override the common maximum downstream data rate. Packets that contain ToS bytes that have not been configured for downstream data rates continue to use the common data rate limits.
Prior releases set the ToS bits to zero; however, with the advent of virtual private network (VPN) and QoS applications, it is desirable to copy the ToS bits when the router encapsulates the packets using generic routing encapsulation (GRE). Thus, intermediate routers between tunnel endpoints can also take advantage of QoS features such as weighted fair queuing (WFQ) and weighted random early detection (WRED).
Baseline privacy extensions permit the encryption of data transferred between the cable modem and the Cisco uBR7200 series universal broadband router. The key management protocol defined by baseline privacy allows Cisco uBR7200 series universal broadband routers to provide two types of keys to cable modems. The Key Exchange Key (KEK) decrypts the Traffic Exchange Keys (TEK). The TEK is the key used to encrypt and decrypt data packets.
The Management Information Base (MIB) support in the Cisco uBR7200 series universal broadband routers provides much of the same ability to configure the router as using CLI commands at the router's console port. Additionally, the Radio Frequency (RF) Interface MIB has changed to improve the object support for traps and to add the following QoS and service class support:
This feature---also known as Per-Modem and Per-Host Access Lists---allows Cisco uBR7200 series universal broadband routers to filter incoming packets from individual hosts or cable modems based on the source MAC or IP address. This allows access lists to be specified on a per-interface or a per-address basis.
The following spectrum management enhancements are available in the Cisco uBR7200 series universal broadband routers:
This feature prevents the spoofing of IP addresses by verifying the IP address against the cable modem's MAC address. The cable source-verify [ dhcp ] cable interface command specifies that DHCP lease query requests are sent to verify any unknown source IP address found in upstream data packets. This feature requires a DHCP server that supports the new LEASEQUERY message type.
This feature was introduced in Cisco IOS Release 12.0(6)SC. The Cisco uBR7200 series universal broadband router supports buffering both upstream and downstream grants to cable modems that are exceeding their allocated bandwidth. This strategy helps to avoid the TCP timeouts and the retransmission of the associated packets which would further degrade overall throughput.
Previously, whenever a cable modem was found to be exceeding its configured peak upstream or downstream rate, the Cisco uBR7200 series universal broadband router would simply drop the bandwidth requests from that cable modem until it could be allowed to send more data.
The cable downstream port number rate-limit token-bucket shaping and cable upstream port number rate-limit token-bucket shaping commands configure the Cisco uBR7200 series universal broadband router to perform rate shaping by buffering the grants for rate-exceeded modems.
Cisco IOS Release 12.0(6)SC implements the latest revision (version 3) of the Simple Network Management Protocol (SNMPv3), which builds on top of the previous SNMPv1 and SNMPv2 versions of the protocol to provide a much more secure network environment. SNMPv3 also improves the remote configuration of the SNMP entities, which makes the remote administration of SNMP agents, such as cable modems, a much simpler task.
SNMPv3 uses the concept of an engine to link specific applications and security features with a group of SNMP entities. Each SNMP entity has an EngineID identifier, and SNMP communication is possible only when an SNMP entity knows the EngineID identity of its peer SNMP device.
SNMPv3 provides for synchronization between SNMP entities so that any management requests that appear outside of the synchronization windows are rejected. Security is also enhanced by the use of a user-based security model (USM) that provides message encryption to protect against the following types of attacks on the network:
The SNMPv3 protocol is defined by RFC 2570, RFC 2571, RFC 2572, RFC 2573, RFC 2574, and RFC 2575.
Use the ip flow-cache, ip flow-export, and ip route-cache commands to configure Netflow Switching. See the Cisco IOS Release 12.0 Cisco IOS Switching Services Configuration Guide on the Documentation CD-ROM and CCO for more details.
The addition of the CISCO-PROCESS-MIB and changes to the CISCO-MEMORY-POOL-MIB will allow you to retrieve more CPU and memory statistics. The CISCO-CALL-HISTORY-MIB will let you retrieve call information for accounting purposes.
Cisco IOS Release 12.0(9)SC for the Cisco uBR7200 series universal broadband routers contains the following limitations and restrictions. Unless otherwise indicated, these limitations and restrictions apply to all previous software releases as well.
The MC16E cable modem card cannot distinguish between EuroDOCSIS cable modems and set-top boxes (STBs).
When replacing a cable modem card using online insertion and removal (OIR), Cisco recommends you use the shutdown interface command on the card's interfaces before removing the card. After inserting the replacement card, use the no shutdown command to reenable the card's interfaces.
This is especially important when replacing the cable modem card that supplies the MAP timer. If you remove this cable modem card without using the shutdown command, it disables the MAP timer and causes all cable modems attached to the Cisco uBR7200 series router to go offline. The shutdown command, however, transfers the MAP timer function to the next available cable modem card, so that the cable modems attached to the other interfaces are not affected by the OIR of this particular cable modem card.
The port adapters shown in Table 5 must be at the indicated hardware revision levels to be used in the Cisco uBR7246 VXR router. If an earlier revision level of one of these port adapters is installed in a Cisco uBR7246 VXR router, the port adapter is disabled and the following error message is displayed:
%PA-3-REVNOTSUPPORTED: PA in slot x (xxxx) requires base h/w revision of (x.xx) for this chassis
| Port Adapter | Required Hardware Revision | Minimum Part Number |
|---|---|---|
PA-4E | 1.14 | 800-02070-04 |
PA-8E | 1.14 | 800-02069-04 |
PA-H | 1.17 | 800-02747-06 |
PA-2H | 1.3 | 800-03306-02 |
The Signal-Noise Ratio (SNR) output in the cable show controller command is supported only on the MC11C, MC12C, MC14C, and MC16C cable modem cards. Although this command might display SNR statistics for some versions of the MC16B cable modem card, that output should be disregarded.
The following sections contain important notes about Cisco IOS Release 12.0(9)SC that apply to Cisco uBR7200 series universal broadband routers.
The following defect has caused all images in the Cisco IOS Release 12.0(8)SC to be deferred:
To prevent this potential hazard to customer networks, Cisco Systems Inc. has deferred and removed the affected images from CCO.
If you already have this image in your network, please replace it with images from the Cisco IOS Release 12.0(8)SC1 release, currently available on CCO.
For questions regarding this notice, please contact Jeff Kerr, Program Manager.
The MC11C, MC12C, MC14C, MC16C, and MC16E modem cards deliver +42 dBmV output power to the IF-to-RF upconverter at the CATV headend, which is 10-dB greater than previously released modem cards. Certain upconverters require a 10-dB attenuator in the downstream signal between one of these modem cards and the upconverter to avoid overloading the upconverter input, which would interfere with downstream transmissions, particularly in the 256-QAM mode. See the Downstream IF Power-Level Adjustment Notice on CCO and the Documentation CD-ROM for more information on which upconverters require installing the attenuator.
Be aware that when configuring a routing protocol on a Cisco uBR7200 series cable interface, the Cisco IOS software must reset the interface to enable the change. This in turn causes all cable modems on that particular downstream to reinitialize, potentially interfering with data transmission on that downstream. Therefore you should use the interface configuration commands, such as router rip, on a cable interface only when a minimum of subscribers would be affected.
The original MC11 modem card (MC11-FPGA) is supported only on Cisco uBR7223 and uBR7246 routers that are using the NPE-150 or NPE-200 processor cards. If the router is using a later processor card, such as the NPE-300, the MC11-FPGA is not supported and current modem cards such as the MC11C card must be used.
The Cisco uBR7200 series universal broadband router must have a minimum of 64 MB of DRAM to run all Cisco IOS Release 12.0(9)SC images.
The uBR7200 series universal broadband routers support the following categories of MIBs:
The Cable-Specific MIBs and Deprecated MIBs are described in the following sections. For information on the SNMP standard MIBs and Cisco's platform and network-layer enterprise MIBs, see Cisco's MIB website at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
Table 6 shows the cable-specific MIBs that are supported on the Cisco uBR7200 series universal broadband routers, including both DOCSIS-specific MIBs and SNMP standard MIBs common across most of Cisco's router platforms. The 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. Because of interdependencies, the MIBs must be loaded in the order given in the table.
| MIB Filename | Description | Release |
|---|---|---|
SNMPv2-MIB.my | The management protocol, SNMPv2, provides for the exchange of messages which convey management information between the agents and the management stations, as defined in RFC 1907. | 12.0(6)SC |
This module specifies the Structure of Management Information (SMI) for SNMPv2, as defined in RFC 1902. | 12.0(6)SC | |
This module defines the textual conventions as specified in RFC 1903. | 12.0(6)SC | |
This module specifies the Structure of Management Information (SMI) for Cisco's enterprise MIBs. | 12.0(6)SC | |
This module defines the textual conventions used in Cisco's enterprise MIBs. | 12.0(6)SC | |
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 2233. | 12.0(6)SC 12.0(9)SC | |
ETHERLIKE-MIB.my | This module defines managed objects for the Ethernet-like interface types, as defined in RFC 2665. | 12.0(9)SC |
BRIDGE-MIB.my | This module supports all objects, tables, and groups except dot1dBasePortTable, dot1dTpPortTable, and dot1DStaticGroup, as defined in RFC 1493. Not supported in ubr7200-p-mz and ubr7200-ps-mz images. | 12.0(9)SC |
UDP-MIB.my | This module defines managed objects for managing implementations of the User Datagram Protocol (UDP), as defined in RFC 2013. | 12.0(9)SC |
RFC1213-MIB.my | This module defines managed objects for managing implementations of the Internet Protocol (IP) and its associated Internet Control Message Protocol (ICMP), as defined in RFC 2011. | 12.0(9)SC |
This module describes the DOCSIS-compliant Radio Frequency (RF) interfaces in cable modems and cable modem termination systems, as defined in RFC 2670. | 12.0(8)SC | |
This module---available in an SNMPv2 version only---describes the attributes for the DOCSIS-specified Baseline Privacy Interface (BPI) on cable modems and the CMTS. | 12.0(9)SC | |
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. | 12.0(6)SC | |
This module describes the spectrum management flap-list attributes. | 12.0(6)SC |
A number of older Cisco-provided MIBs have been replaced with more scalable, standardized MIBs; the 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 7 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 when Cisco IOS software no longer supports the corresponding feature set.
| Deprecated MIB | Replacement MIBs | |
|---|---|---|
| SNMPv1 MIB | SNMPv2 MIB | |
| ||
OLD-CISCO-CPU -MIB |
| |
|
| |
|
| |
| ||
(Compilation of other OLD* MIBS) | ||
|
| |
|
| |
Because of changes in handling the MAC address between Cisco IOS Software Releases 11 and 12.0 SC, you must clear the Address Resolution Protocol (ARP) tables after upgrading from Cisco IOS Release 11 to Release 12.0(9)SC. Failure to do this could cause cable modem registration to fail during time of day (ToD) provisioning. Clearing the ARP tables must be done on all routers and ToD servers connected to the Cisco uBR7200 series cable router.
Online insertion and removal (OIR) is supported only for the same version and model of a modem card (for example, replacing an MC16C modem card with another MC16C modem card). If you are upgrading from one version of a modem card, hot-swapping does not preserve the card's configuration because the Cisco IOS software recognizes that the new card is not identical to the old one.
You can use OIR to hot-swap an older version of a modem card with a newer one, but you must then reload the card's configuration from NVRAM to restore the modem card to operational status.
When the Cisco uBR7223 or Cisco uBR7246 router first powers on, messages similar to the following can appear immediately after the boot image loads and initializes:
%PA-2-UNDEFPA: Undefined Port Adapter type 248 in bay 3 %PA-2-UNDEFPA: Undefined Port Adapter type 248 in bay 4 %PA-2-UNDEFPA: Undefined Port Adapter type 243 in bay 5 %PA-3-DEACTIVATED: port adapter in bay [3] powered off. %PA-3-DEACTIVATED: port adapter in bay [4] powered off. %PA-3-DEACTIVATED: port adapter in bay [5] powered off. %SYS-6-BOOT_MESSAGES: Messages above this line are from the boot loader.
The exact number of messages depends on the number of port adapters and cable modem cards installed in the Cisco uBR7200 series chassis. The messages about undefined port adapters can be safely ignored because the boot loader is not expected to recognize the cable modem cards. Instead, the cable modem cards are activated by the Cisco IOS software image, which the boot loader loads immediately after displaying the above messages.
Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.
For information on additional caveats in Cisco IOS Release 12.0 T, see Caveats for Cisco IOS Release 2.0 T.
All caveats in Release 12.0 are also in Release 12.0 T. For information on caveats in Cisco IOS Release 12.0, see Caveats for Cisco IOS Release 12.0.
There are no caveats listed as open in Cisco IOS Release 12.0(9)SC.
All the caveats listed in this section are closed or resolved in Cisco IOS Release 12.0(9)SC.
Cisco IOS Release 12.0(8)SC1 includes bug fixes to Release 12.0(8)SC. Those caveats from Release 12.0(8)SC not closed or resolved in Release 12.0(8)SC1 are still open. Please refer to the "Open Caveats for Release 12.0(8)SC" section for details on those caveats not closed or resolved in Release 12.0(8)SC1.
All the caveats listed in this section are closed or resolved in Cisco IOS Release 12.0(8)SC1.
router1 uptime is 3 days, 8 hours, 34 minutes System returned to ROM by bus error at PC 0x60276FFC, address 0x80000D at 20:19:54 GMT Thu Jan 20 2000 System restarted at 20:21:27 GMT Thu Jan 20 2000 System image file is "slot0:ubr7200-k1ps-mz.120-8.SC.bin" 0x60276FFC:cmts_delete_sid_state(0x60276fa8)+0x54
All the caveats listed in this section are open in Cisco IOS Release 12.0(8)SC.
router1 uptime is 3 days, 8 hours, 34 minutes System returned to ROM by bus error at PC 0x60276FFC, address 0x80000D at 20:19:54 GMT Thu Jan 20 2000 System restarted at 20:21:27 GMT Thu Jan 20 2000 System image file is "slot0:ubr7200-k1ps-mz.120-8.SC.bin" 0x60276FFC:cmts_delete_sid_state(0x60276fa8)+0x54
All the caveats listed in this section are closed or resolved in Cisco IOS Release 12.0(8)SC.
%UBR7200-3-SPIERRW (Cable5/0): SPI PENDING WRITE ERROR:
Hardware is MC11-FPGA
Hardware is MC11C
Hardware is MC12C
Hardware is MC14C
Hardware is MC16B
Hardware is MC16C
Hardware is MC16EThe following sections describe the documentation available for the Cisco uBR7200 series universal broadband routers. These documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, feature modules, and other documents.
Documentation is available as printed manuals or electronic documents, except for feature modules, 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 12.0 and are located on CCO and the Documentation CD-ROM:
These documents are available for the Cisco uBR7200 series universal broadband routers on CCO and the Documentation CD-ROM:
On CCO:
Technical Documents: Documentation Home Page: Broadband/Cable Solutions: Cisco uBR7200 Series Universal Broadband Routers
On the Documentation CD-ROM:
Cisco Product Documentation: Broadband/Cable Solutions: Cisco uBR7200 Series Universal Broadband Routers
Feature modules describe new features supported by Cisco IOS Release 12.0 T 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:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation: New Features in Release 12.0 T
The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents, which are shipped with your order in electronic form on the Documentation CD-ROM---unless you specifically order the 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, and 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: configuration guides and command references.
On CCO:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References: Cisco IOS Interface Configuration Guide or Cisco IOS Interface Command Reference
Table 8 describes the contents of the Cisco IOS Release 12.0 software documentation set, which is available in electronic form, and also in printed form upon request.
On CCO:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References
| Books | Chapter Topics |
|---|---|
| Configuration Fundamentals Overview |
| Transparent Bridging |
| Dial-In Port Setup |
| Interface Configuration Overview |
| IP Addressing |
| AppleTalk |
| Apollo Domain |
| AAA Security Services |
| Switching Paths for IP Networks |
| ATM |
| Voice over IP |
| Classification |
|
|
For service and support for a product purchased from a reseller, contact the reseller, who offers a wide variety of Cisco service and support programs described in "Service and Support" of Cisco Information Packet shipped with your product.
For service and support for a product purchased directly from Cisco, use CCO.
If you have a CCO login account, you can access the following URL, which contains links and helpful tips on configuring your Cisco products:
http://www.cisco.com/kobayashi/serv_tips.shtml
This URL is subject to change without notice. If it changes, point your web browser to CCO and click on this path: Products & Technologies: Products: Technical Tips.
The following sections are provided from the Technical Tips page:
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can reach CCO in the following ways:
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Cisco documentation and additional literature are available in a CD-ROM package that ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.
Posted: Mon Mar 6 09:01:58 PST 2000
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