Table Of Contents
Release Notes for the Cisco 1516M Hub
April 12, 1999
These release notes provide information on the Cisco 1516M Hub. This product is also known as the HP 10Base-T Hub-16M.
The tracking numbers for some items in this document are added for your convenience.
Problem Resolved in Firmware Release A.01.04
•You can now change the password to the console by using the Password command. [CSCdk60726]
Problems Resolved in Firmware Release A.01.03
•This release fixes a problem within the Internetwork Packet Exchange (IPX) protocol stack. An invalid IPX Routing Information Protocol (RIP) packet with an invalid IPX size (smaller than a valid IPX packet) caused the agent to hang. The agent now determines if the IPX size provided in the packet is a valid length. If it is not valid, the packet is discarded. [NMT3404]
•The Trivial File Transfer Protocol (TFTP) command is now in the normal command set. This change resolves the internal conflict between TFTP and Telnet that caused TFTP to hang during firmware download, thus corrupting the firmware in Flash memory.
To download the firmware from a remote management station, use the Hewlett-Packard (HP) downloader program. It has an easy-to-use interface, and you can simultaneously download the firmware to a number of hubs.
Note Use the TF command only from the serial console, never from a Telnet console.
Problem Resolved in Firmware Release A.01.02
•The console password is now separated from the Simple Network Management Protocol (SNMP) community name. This change prevents the network-wide community name from being revealed on all devices. You can also use a console command to change the community name from the console.
Note The Password Clear button on the hub back panel only clears the console password, not the community name.
Problems Resolved in Firmware Release A.01.01
•Land.c packets are now detected and discarded without causing the hub to hang and reboot after 30 minutes. [NMT3291]
•Giant Internet Protocol (IP) packets, usually pings, no longer cause the agent to leak networking m_bufs and cause the hub to hang. The hub now detects a memory leak and reboots after 30 minutes. [NMT3395 and NMT3396]
New Feature in Firmware Release A.01.01
•Classless interdomain routing (CIDR) is now supported. [NMT3298 and NMT3383]
•You can set the subnet extension of an IP address to all zeros or all ones. The following example shows how this feature is implemented for an address mask:CLASS B: 255.255. 0. 0 Default net mask for CLASS Bmask: 255.255.255. 0 Subnet extension is 0.0.255.0IP: 15. 29. 0.182 Zero subnet extension, now legalIP: 16.121.255. 71 Ones subnet extension, now legal
•You can set the subnet mask to a supernet value. The following example shows a subnet mask that is shorter than the class default mask.CLASS C: 255.255.255. 0 Default net mask for CLASS Cmask: 255.248. 0. 0 Supernet mask (shorter than C)
Use the HP 10Base-T Hub-16M Installation and Reference Guide with this document.
Cisco Connection Online
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 access CCO in the following ways:
•Modem: From North America, 408 526-8070; from Europe, 33 1 64 46 40 82. Use the following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up to 28.8 kbps.
For a copy of CCO's Frequently Asked Questions (FAQ), contact firstname.lastname@example.org. For additional information, contact email@example.com.
Note If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or firstname.lastname@example.org. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or email@example.com.
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more up to date 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 orderable as a single package or as an annual subscription on the World Wide Web at http://www.cisco.com/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.
OL-0159-01 Rev. A0