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November 22, 1999
These release notes for the Cisco uBR7200 series universal broadband routers describe the enhancements provided in Cisco IOS Release 12.0(7)SC, which is an early deployment release. These release notes are updated as needed to describe memory requirements, new hardware support, software platform deferrals, and related documents.
For a list of the software caveats that apply to Release 12.0(7)SC, see "Caveats for Release 12.0(7)SC" section.
Use these release notes with Cross-Platform Release Notes for Cisco IOS Release 12.0 located on Cisco Connection Online CCO) and the Documentation CD-ROM.
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-compliant cable modems.
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.
These routers support IP routing with a wide variety of protocols and combinations of Ethernet, Fast Ethernet, serial, High-Speed Serial Interface (HSSI), Packet-over-Sonet (POS) OC-3 and OC-12c, and Asynchronous Transfer Mode (ATM) media.
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-sized network installations.
These release notes describe the Cisco uBR7200 universal broadband series routers for Cisco IOS Release 12.0(7)SC. Release 12.0 SC is an early deployment (ED) release that supports new hardware and contains fixes to software caveats. Other early deployment releases of the Cisco uBR7200 series routers are shown in Table 1; unless otherwise indicated, feature support is cumulative from release to release.
| ED Release | Additional Software Features1 | Additional Hardware Features | Availability |
|---|---|---|---|
Release 11.3(11)NA | None | None | Now |
Release 12.0(4)XI2 |
|
| Now |
Release 12.0(5)T1 |
|
| Now |
Release 12.0(6)SC | None (no Telco Return, RADIUS, Multiple SID, or DOCSIS QoS extensions support) |
| Now |
Release 12.0(7)SC | None (no Telco Return, RADIUS, Multiple SID, or DOCSIS QoS extensions support) |
| Now 12/1999 12/1999 12/1999 |
| 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 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(7)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 Two-Way | ubr7200-p-mz | 16 MB Flash | 64 MB DRAM | RAM | Added in Release 11.3(1)T and 12.0(1)T |
DOCSIS Two-Way IP Plus | ubr7200-ps-mz | 16 MB Flash | 64 MB DRAM | RAM | Added in Release 11.3(1)T and 12.0(1)T |
DOCSIS Two-Way with Baseline Privacy | ubr7200-klp-mz | 16 MB Flash | 64 MB DRAM | RAM | Added in Release 12.0(4)XI and 12.0(5)T |
DOCSIS Two-Way IP Plus with Baseline Privacy | ubr7200-klps-mz | 16 MB Flash | 64 MB DRAM | RAM | Added in Release 12.0(4)XI and 12.0(5)T |
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(7)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(7)SC also supports the NPE-300 card, which has an R7000 microprocessor that operates at an internal clock speed of 262 MHz (supported only on the Cisco uBR7426 VXR).
Cisco IOS Release 12.0(7)SC also supports the following currently available cable modem cards:
Table 3 lists and describes the port adapters supported by Cisco uBR7200 series routers in Cisco IOS Release 12.0(7)SC.
| Product Number1 | Description | Platforms Supported | In2 |
|---|---|---|---|
| ATM | |||
1-port ATM OC-3c/STM-1 single-mode intermediate reach port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
1-port ATM OC-3c/STM-1 multimode port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
5-port ATM CES3 (4 E1 120-ohm CBR4 ports and 1 OC-3 ATM single-mode port) port adapter | Cisco uBR7246, uBR7246 VXR | 12.0(3)T and later 12.0 T releases | |
5-port ATM CES3 (4 E1 120-ohm CBR4 ports and 1 E3 ATM port) port adapter | Cisco uBR7246, uBR7246 VXR | 12.0(3)T and later 12.0 T releases | |
5-port ATM CES3 (4 T1 CBR4 ports and 1 OC-3 ATM single-mode port) port adapter | Cisco uBR7246, uBR7246 VXR | 12.0(3)T and later 12.0 T releases | |
5-port ATM CES3 (4 T1 CBR4 ports and 1 T3 ATM port) port adapter | Cisco uBR7246, uBR7246 VXR | 12.0(3)T and later 12.0 T releases | |
1-port E3 ATM, PCI-based port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1-port T3 ATM, PCI-based port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1-port OC-3c/STM-1 multimode port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1-port OC-3c/STM-1 single-mode, intermediate reach port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1-port OC-3c/STM-1 single-mode, long reach port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
| Ethernet | |||
4-port Ethernet 10BaseT port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
8-port Ethernet 10BaseT port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
1-port 100BaseTX Fast Ethernet port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
1-port 100BaseFX Fast Ethernet port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
2-port 100BaseTX Fast Ethernet port adapter with token-ring Inter-Switch Link (ISL) support | Cisco uBR7200 series routers | 12.0(5)T and later 12.0 T releases | |
2-port 100BaseFX Fast Ethernet port adapter with token-ring Inter-Switch Link (ISL) support | Cisco uBR7200 series routers | 12.0(5)T and later 12.0 T releases | |
12-port 10BaseT and 2-port 10/100BaseTX port adapter | Cisco uBR7246, uBR7246 VXR | 12.0(5)T and later 12.0 T releases | |
1-port IEEE 802.3z Gigabit Ethernet port adapter | Cisco uBR7246 VXR only | 12.0(7)SC | |
| High-Speed Serial Interfaces (HSSI) | |||
1-port HSSI port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
2-port HSSI port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
| Packet-Over-SONET (POS) | |||
1-port POS OC-3 (STM-3c,STM-1/SDH) single-mode, long reach port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1-port POS OC3 (STM-3c,STM-1/SDH) single-mode, intermediate reach port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1-port POS OC3 (STM-3c,STM-1/SDH) multimode port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
PA-SRP-OC12SML | dual-port OC-12c (STM4c) single-mode fiber, long reach DPT port adapter | Cisco uBR7246, uBR7246 VXR | 12.0(7)SC |
PA-SRP-OC12SMI | dual-port OC-12c (STM4c) single-mode fiber, intermediate reach DPT port adapter | Cisco uBR7246, uBR7246 VXR | 12.0(7)SC |
PA-SRP-OC12MM | dual-port OC-12c (STM4c) multimode fiber DPT port adapter | Cisco uBR7246, uBR7246 VXR | 12.0(7)SC |
| Serial | |||
4-port synchronous serial port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
8-port EIA/TIA-232 synchronous serial port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
8-port V.35 synchronous serial port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
8-port X.21 synchronous serial port adapter | Cisco uBR7200 series routers | 11.3(8)NA and later 11.3 NA releases | |
4-port unbalanced (75-ohm) E1-G.703/G.704 synchronous serial port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
4-port balanced (120-ohm) E1-G.703/G.704 synchronous serial port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1-port E3 serial port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1-port T3 serial port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
2-port E3 serial port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
2-port T3 serial port adapter | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1 multichannel E3, medium-speed serial interface | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1 multichannel T3 interface with BNC connectors | Cisco uBR7200 series routers | 12.0(3)T and later 12.0 T releases | |
1 multichannel DS1/PRI with 4 T1 interfaces (RJ-48C connectors) | Cisco uBR7200 series routers | 12.0(5)T and later 12.0 T releases | |
1 multichannel DS1/PRI with 8 T1 interfaces (RJ-48C connectors) | Cisco uBR7200 series routers | 12.0(5)T and later 12.0 T releases | |
1 multichannel DS1/PRI with DS1 DSU functionality and DS0 channel support | Cisco uBR7200 series routers | 12.0(5)T and later 12.0 T releases | |
1 multichannel E1/PRI with 8 E1 interfaces (RJ-48C connectors) | Cisco uBR7200 series routers | 12.0(5)T and later 12.0 T releases | |
| 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. |
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(7)SC, RELEASE SOFTWARE
The output includes additional information such as processor revision numbers, memory amounts, and partition information.
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: Product Bulletins: Software
Under Cisco IOS 12.0, click Cisco IOS Software Release 12.0S Ordering Procedures (#935: 6/99). This document can also be found on CCO at http://www.cisco.com/warp/public/cc/cisco/mkt/ios/rel/120/prodlit/935_pb.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, 56-bit data encryption feature sets) are subject to United States government export controls and limited distribution. Images to be installed outside the United States require an export license. Customer orders may be denied or subject to delay because of United States government regulations, which can change without advance notice. Contact your sales representative or distributor for more information, or send an e-mail to export@cisco.com. |
Table 4 lists the features and feature sets supported by the Cisco uBR7200 series in Cisco IOS Release 12.0 SC and uses the following conventions:
.
| Feature | Feature Set | ||||
|---|---|---|---|---|---|
| In1 | DOCSIS Two-Way | DOCSIS Two-Way, Baseline Privacy | DOCSIS Two-Way IP Plus | DOCSIS Two-Way IP Plus with Baseline Privacy | |
| Internet | |||||
| (3) | Yes | Yes | Yes | Yes |
| (4)XI2 (5)T1 | Yes | Yes | Yes | Yes |
| (4)XI2 (5)T1 | Yes | Yes | Yes | Yes |
| IP Routing | |||||
| (3) | Yes | Yes | Yes | Yes |
| (4) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (4)XI1 | Yes | Yes | Yes | Yes |
| Management | |||||
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (5)NA | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| Multimedia | |||||
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| Quality of Service | |||||
| (5)NA | Yes | Yes | Yes | Yes |
| (9)NA1 | Yes | Yes | Yes | Yes |
| (9)NA1 | Yes | Yes | Yes | Yes |
| (5)NA | Yes | Yes | Yes | Yes |
| (5)NA | Yes | Yes | Yes | Yes |
| (9)NA1 | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (4)XI1 | Yes | Yes | Yes | Yes |
| Security | |||||
| (3) | Yes | Yes | Yes | Yes |
| (5)NA | No | Yes | No | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (8)NA | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| Switching | |||||
| (3) | Yes | Yes | Yes | Yes |
| WAN Optimization | |||||
| (3) | Yes | Yes | Yes | Yes |
| WAN Services | |||||
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
|
| Yes | Yes | Yes | Yes |
|
| Yes | Yes | Yes | Yes |
|
| Yes | Yes | Yes | Yes |
|
| Yes | Yes | Yes | Yes |
|
| Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
| (3) | Yes | Yes | Yes | Yes |
|
| Yes | Yes | Yes | Yes |
| (3) | 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(7)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.
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 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 supports 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 (32KB, 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 uBR7246 VXR chassis when using Cisco IOS Release 12.0(7)SC or later 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 Cisco Documentation CD-ROM.
The OC-12c dynamic packet transport (DPT) port adapter is a dual-width OC-12c port adapter that provides a shared IP over SONET capability. The DPT port adapter is available in three models (multimode fiber, single-mode fiber, intermediate reach, single-mode fiber, long reach).
The DPT port adapter provides 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 rings. 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 supports the 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 hardware features 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, and minimized security.
For more information, refer to the Cisco uBR7200 Series Cable Modem Card Installation and Configuration publication.
There are no new software features supported by the Cisco uBR7200 series in Cisco IOS Release 12.0(6)SC.
The following new hardware features are supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(5)T.
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) control software and logical link management software based on DOCSIS standards, and minimized security.
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 multichannel DS1/PRI port adapter (PA-MC-4T1 and PA-MC-8T1 versions) is a single-wide module that integrates channel service unit (CSU) functionality, data service unit (DSU) functionality, and DS0 channel support into Cisco uBR7200 series routers. The PA-8DSX-1 version integrates DS1 data service unit (DSU) functionality and DS0 channel support into the Cisco uBR7200 series routers.
The multichannel DS1/PRI port adapter provides four or eight independent T1 (100-ohm) connections via RJ-48C connectors. Each multichannel DS1/PRI port adapter can provide up to 128 separate full-duplex HDLC DS0, fractional, or full T1 channels.
The multichannel E1/PRI port adapter (PA-MC-8E1/120) is a single-wide module that integrates DSU functionality and E1 channel support into Cisco uBR7200 series routers. The multichannel E1/PRI port adapter provides eight independent E1 (120-ohm) connections via RJ-48C connectors. Each multichannel E1/PRI port adapter can provide up to 128 separate full-duplex HDLC channelized E1, fractional E1, full E1, or unframed E1 interfaces.
The following new software features are supported by the Cisco uBR7200 series universal broadband routers in Cisco IOS Release 12.0(5)T. Unless otherwise noted, these features first appeared in Cisco IOS Release 12.0(5)T software images.
This feature provides support for a basic wiretap facility for VoIP calls, as required by the United States Federal Communications Assistance for Law Enforcement Act (CALEA). The wiretap facility is based on the MAC address of the cable modem, so it can be used for either data or digitized voice connections.
The feature is controlled by the new interface command, cable intercept, which requires a MAC address, an IP address, and a UDP port number as its parameters. When activated, the Cisco uBR7200 series universal broadband router examines each packet for the desired MAC address; when a matching MAC address is found (for either the origination or destination endpoint), a copy of the packet is encapsulated into a UDP packet, which is then sent to the specified server at the given IP address and port.
Cisco uBR7200 series universal broadband routers support the Cisco IOS firewall feature, which is available in selected Cisco IOS Release 12.0(5)T and higher images. This feature set includes Network Address Translation (NAT) and is designed to prevent unauthorized, external access to your internal network, blocking attacks on your network, while still allowing authorized users to access network resources. This feature is described in detail in the Cisco IOS Firewall Feature Set feature module, available on the Documentation CD-ROM and CCO.
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:
The Automated Double Authentication feature enhances the existing double authentication feature. Previously, with the existing double authentication feature, a second level of user authentication was achieved when the user telnets to the network access server or router and enters a username and password. Now, with automated double authentication, the user does not have to use Telnet but instead responds to a dialog box that requests a username and password or PIN.
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.
As an enhancement to baseline privacy, Cisco uBR7200 series universal broadband routers can be configured for cable modem and multicast authentication using the Remote Authentication Dial-In User Service (RADIUS) protocol, an access server authentication, authorization, and accounting protocol originally developed by Livingston, Inc. This release also introduces support for additional vendor-proprietary RADIUS attributes.
When a cable modem comes online or when an access request is sent through a multicast data stream, the Cisco uBR7200 series universal broadband routers send relevant information to RADIUS servers for cable modem/host authentication. This feature can be configured on a per-interface basis.
An Internet Engineering Task Force (IETF) draft standard, RFC 2138, defines the RADIUS protocol. RFC 2139 defines the corresponding RADIUS accounting protocol. Additional RFC drafts define vendor-proprietary attributes and MIBs that can be used with an SNMP manager.
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 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 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.
As part of this support, Cisco uBR7200 series universal broadband routers support multiple service classes per cable modem by providing multiple QoS service identifiers (SIDs). This allows the Cisco uBR7200 series cable modem termination system (CMTS) to dynamically allocate and delete service flows for voice and fax transmissions.
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 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 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.
Extensive command-line interface enhancements include user configuration using the command-line interface, SNMP, and HTTP. All methods will provide essentially the same set of configuration objects.
Cisco uBR7200 series universal broadband routers are now able to respond to RFC 868 time-of-day (ToD) queries from cable modems during the registration process.
Cisco uBR7200 series routers support the Inter-Switch Link (ISL) feature, a Cisco protocol for interconnecting multiple routers and switches. The ISL protocol maintains Virtual Local Area Network (VLAN) information as traffic passes between routers and switches.
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:
The Parse Bookmarks feature quickly processes consecutive similar commands, such as access lists and prefix lists, up to five times faster than usual. This feature reduces boot and load time for large configurations with many similar consecutive commands. This feature is an enhancement to the parsing algorithm, so no configuration changes are needed to take advantage of it.
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-direction basis.
The Service Assurance (SA) Agent is both an enhancement to and a new name for the Response Time Reporter (RTR) feature that was introduced in Cisco IOS Release 11.2. This feature allows you to monitor network performance by measuring key Service Level Agreement metrics such as response time, network resources, availability, jitter, connect time, packet loss, and application performance.
With Cisco IOS Release 12.0(5)T, the SA Agent provides new capabilities that enable you to:
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 which supports the new LEASEQUERY message type.
This feature was first introduced in Cisco IOS Release 11.3(9)NA1. 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.
The following new hardware feature is supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.0(3)T.
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, and minimized security.
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 following new software features are supported by the Cisco uBR7200 series universal broadband routers in Cisco IOS Release 12.0(3)T.
The Cisco uBR7200 series universal broadband router can use Committed Access Rate (CAR) policies to control the traffic exceeding its allocated bandwidth. This feature uses token bucket filters to measure the traffic load and limit sources, at either the network ingress or egress, to the allocated bandwidth.
Cisco IOS Release 12.0(3)T 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 the Request for Comment (RFC) specifications RFC 2570, RFC 2571, RFC 2572, RFC 2573, RFC 2574, and RFC 2575.
The Cisco uBR7200 series universal broadband router offers an integrated Dynamic Host Configuration Protocol (DHCP) server to simplify provisioning of cable modems.
IP policy routing now works with Cisco Express Forwarding (CEF), Distributed CEF (DCEF), NetFlow, and NetFlow with flow acceleration. IP policy routing was formerly supported only in fast-switching and process-switching. Now that policy routing is integrated into CEF, you can deploy policy routing on wide-scale and high-speed interfaces.
NetFlow switching is a high-performance, network-layer switching path that provides network administrators with access to "call detail recording" information from their data networks; this information includes details such as user, protocol, port, type of service information, and the duration of the communication. This data can be used for a variety of purposes, including billing, enterprise accounting, network planning and performance analysis, quality of service (QoS) bandwidth management, security policies, and data warehousing/mining for marketing purposes.
The collected NetFlow data is sent out via UDP packets to a workstation running the Netflow Flowcollector server, which can collect data from multiple routers for later analysis by a user running the Netflow Flowanalyzer application. Through the NetFlow Data Export feature, traffic information can also be passed to external applications that perform functions such as billing or network performance analysis.
NetFlow also provides a highly efficient mechanism that can process security access lists without incurring the same performance penalty as other available switching methods. In conventional switching at the network layer, each incoming packet is handled on an individual basis with a series of functions to perform access list checks, capture accounting data, and switch the packet. In contrast, after NetFlow switching identifies a flow and processes the access list for the flow's first packet, all subsequent packets are handled on a "connection-oriented" basis as part of the flow. This avoids further access list checks on the flow, and packet switching and statistics capture are performed in tandem.
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 Resource Reservation Protocol (RSVP) works together with Weighted Fair Queuing (WFQ) to give priority to packets that fall into a reservation within RSVP so that the packets enter the output queue and cable network before other packets.
Tag Switching is a Cisco-developed technology that implements a next-generation architecture for the Internet backbone and large intranets. Tags placed on the fronts of packets contain forwarding information used for making switching decisions and applying network services.
Tag Switching has become the foundation for flexible Layer 3 virtual private networks (VPNs), QoS handling, and traffic engineering. It also forms the basis for the emerging IETF standard for Multiprotocol Label Switching (MPLS).
A Tag Switching infrastructure combines with advanced routing protocol capabilities to define IP VPNs by selectively advertising IP reachability information to just those subscribers within the same VPN or extranet, thus keeping different VPN traffic logically separate. The subscribers are then all connected via Tag switch paths (TSPs).
Forwarding is based entirely upon the assigned Tag values (rather than IP destination prefixes), eliminating the requirement for uniqueness in the IP addresses that are used. This feature means subscribers to different VPNs do not have to concern themselves with the problems that would otherwise occur when connecting networks with different subnetworks into an integrated network.
Support for both version 1 and version 2 of the Web Cache Control Protocol (WCCP and WCCPv2). See the Cisco Cache Engine User Guide , Version 2.0.0 on CCO and the Documentation CD-ROM for more information about WCCP and WCCPv2. (Previous releases of Cisco IOS Release 12.0 supported only version 2 (WCCPv2) and previous releases of Cisco IOS Release 11.3NA supported only version 1 (WCCP) of the protocol.)
The Weighted Random Early Detection (WRED) feature enhances the Random Early Detection (RED) algorithm of handling congestion conditions by allowing the administrator to specify preferential traffic handling for higher priority traffic (as defined by the IP precedence bits). Administrators can define the minimum and maximum queue depth thresholds and drop probabilities for each class of service.
The Weighted Fair Queuing (WFQ) feature performs priority output queuing and custom queuing to grant resources to important sessions when the network bandwidth is saturated; for example, priority could be given to digitized voice traffic to minimize delays. WFQ provides expeditious handling of high priority traffic while fairly sharing the remaining bandwidth between the lower priority traffic.
Cisco IOS Release 12.0(7)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.
When replacing a cable modem card using online insertion and removal (OIR), it is recommended, but not required, that 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 re-enable the card's interfaces.
This is especially recommended 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 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(7)SC that apply to Cisco uBR7200 series universal broadband routers.
The MC11C, MC12C, MC14C, and MC16C 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 256QAM 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.
Cisco uBR7200 series routers running Cisco IOS Release 12.0 use the global configuration command [no] ip dhcp relay information option to insert DHCP relay-agent option fields. (Previously, routers running Cisco IOS Release 11.3NA used the cable relay-agent-option command, which is no longer supported, for this purpose.)
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, 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(7)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 5 shows the cable-specific MIBs that are supported on the uBR7200 series universal broadband routers. 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 |
|---|---|---|
This module specifies the Structure of Management Information (SMI) for SNMPv2, as defined in RFC 1902. | 11.3T | |
This module defines the textual conventions as specified in pages 4, 10-11 of RFC 854. | 11.3T | |
This module specifies the Structure of Management Information (SMI) for Cisco's enterprise MIBs. | 11.3T | |
This module defines the textual conventions used in Cisco's enterprise MIBs. | 11.3T | |
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. | 11.3T | |
CISCO-CABLE-SPECTRUM-MIB.my CISCO-CABLE-SPECTRUM-MIB-V1SMI.my | This module describes the spectrum management flap list attributes. | 12.0(4)T |
This module describes the DOCSIS-compliant Radio Frequency (RF) interfaces in cable modems and cable modem termination systems. (This MIB is being updated on a release basis to add RFC2670 support as needed.) | 11.3(4)NA | |
DOCS-BPI-MIB.my | 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. | 11.3(11)NA |
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. Note Cisco IOS releases prior to 12.0(5)T1 provide only partial support for the attributes in this MIB. | partial support: full support: |
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 | |
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(Compilation of other OLD* MIBS) | ||
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Because of changes in handling the MAC address between Cisco IOS Software Releases 11.x and 12.0, you must clear the Address Resolution Protocol (ARP) tables after upgrading from Cisco IOS Software Release 11.x to Release 12.0(7)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 (such as MC16B) to a newer version (such as MC16C), hot-swapping does not preserve the card's configuration because the Cisco IOS software recognizes that the new card is not totally 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 a Cisco uBR7200 series 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 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.
This section lists the caveats that describe potentially unexpected behavior in Cisco IOS Release 12.0(7)SC. 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 12.0 T document.
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 R