Table Of Contents
Release Notes for the Catalyst 1900 and Catalyst 2820 Series Switches, Version 9.00.05
Using Previous Releases of the Switch Firmware
Limitation Specific to the Catalyst 2820 Switches
Limitations for the Catalyst 1900 and Catalyst 2820 Switches
Usage Guidelines Specific to the Catalyst 1900 Switches
Usage Guidelines Specific to the Catalyst 2820 Switches
Usage Guidelines for the Catalyst 1900 and Catalyst 2820 Switches
Resolved Caveats in Version 9.00.05
Resolved Caveats in Previous Versions
Release Notes for the Catalyst 1900 and Catalyst 2820 Series Switches, Version 9.00.05
October, 2001
These release notes provide information on the Catalyst 1900 and Catalyst 2820 series Ethernet switches (hereafter referred to as the Catalyst 1900 switches and the Catalyst 2820 switches) using standard and Enterprise Edition firmware version 9.00.05.
Note
This document describes the problems that are resolved in versions 9.00.00 through 9.00.05.
Contents
This document has these sections:
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The tracking numbers for some items in this document are added for your convenience.
Using Previous Releases of the Switch Firmware
The Catalyst 1900 and Catalyst 2820 switches are shipped with firmware version 9.00.05. Depending on the board version of your switch, you need the minimum firmware releases listed in Table 1.
The "System Revision" field on the System Configuration menu displays the board revision of your switch. When you use the show version command from the command-line interface (CLI), the "Hardware Board Revision Is" field displays the board revision.
The Firmware Configuration Menu and the Console and Upgrade Configuration page display the firmware version in use.
Supported Browsers
To use the Catalyst 1900 or Catalyst 2820 Switch Manager, you must have one of these web browsers installed on your management station:
Table 2 Browser Support for Web-Based Management
Netscape Communicator
4.5
4.5, 4.51, 4.61
Microsoft Internet Explorer
4.01a
4.01a, 5.0
Note
For information about configuring your browsers, refer to the Catalyst 1900 Series Installation and Configuration Guide and the Catalyst 2820 Series Installation and Configuration Guide.
Features
The Catalyst 1900 and 2820 switches running firmware version 9.00.00 and above have these features:
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Limitations
These sections provide usage limitations for the switches.
Limitation Specific to the Catalyst 2820 Switches
After removing or inserting a module, click Reload to display a fresh switch image on the Home page.
Limitations for the Catalyst 1900 and Catalyst 2820 Switches
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Usage Guidelines
These sections provide usage guidelines for the switches:
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Usage Guidelines Specific to the Catalyst 1900 Switches
This section describes usage guidelines specific to the Catalyst 1900 switches.
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Usage Guidelines Specific to the Catalyst 2820 Switches
This section describes usage guidelines specific to the Catalyst 2820 switches.
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Usage Guidelines for the Catalyst 1900 and Catalyst 2820 Switches
This section describes usage guidelines that apply to both the Catalyst 1900 and Catalyst 2820 switches.
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Do not use the right mouse-button to bookmark the switch IP address; doing so only saves the specific frame (image) of the switch manager page.
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If the switch is dialing out, the configured baud rate of the switch does not change. The Match Remote Baud rate option (auto baud) applies only when the switch is answering an incoming call and matches a rate less than or equal to the configured rate. When the call is over, the switch reverts to the last configured baud rate.
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Use the System Configuration menu, CLI, or SNMP to change from VLANs to bridge groups and vice versa.
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Caveats
These sections describe open and resolved caveats in firmware versions 9.00.00 through 9.00.05.
Open Caveats
This section describes possible unexpected activity in firmware versions 9.00.00 through 9.00.05.
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When using Netscape Communicator 4.xx on PCs and Sun workstations, minimized, maximized and resized pages of the Catalyst 1900 and Catalyst 2820 Switch Manager might not refresh properly.
The workaround is to click Reload to refresh the page.
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When using Netscape Communicator 4.xx on Windows 95, clicking Apply after making changes to the Port Security Table page sometimes displays a blank page.
The workaround is to click Stop to redisplay the Port Security Table page with your saved changes.
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The Catalyst 1900 and Catalyst 2820 switches do not support the hidden-enable password. If the switch inherits the command-switch hidden-enable password, the switch stores the password as an unencrypted password.
The workaround is to assign a secret enable password to the command switch when your cluster contains Catalyst 1900 and Catalyst 2820 member switches.
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Do not use these settings for the console port when upgrading the switch through the XMODEM protocol: 9600 baud, 7 data bits, 2 stop bits, and even parity.
The workaround is to use other settings or the console port default settings (9600 baud, 8 data bits, 1 stop bit, and no parity).
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If you use bridge groups and Spanning Tree Protocol (STP) is disabled on a bridge group, the switch does not forward the bridge protocol data units (BPDUs) received on any ports in the bridge group to other members of the bridge group. If you are running STP on the rest of your network, network loops might result if the switch connects to other switches.
The workaround is to disable STP on all bridge groups so that the switch forwards received BPDUs if you want to use bridge groups with STP disabled. Assign at least one port to all bridge groups, and then disable STP for each bridge group, using the Bridge Group Spanning Tree Configuration menu (or CLI or SNMP). You can then reassign the ports to whichever group you wish.
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Networks that use IBM Type 1 cabling with ports configured as monitor ports can have problems if the cable becomes disconnected.
The workaround is to configure ports for half-duplex operation because the switch does not detect a loopback if the hermaphroditic connector on the cable is disconnected.
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In a full-duplex configuration with STP disabled, the switch does not detect a loop if an IBM Type 1 cable is disconnected.
The workaround is to configure ports for half-duplex operation if you must have STP disabled.
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If a 100-Mbps switch port has a disconnected IBM Type 1 cable, a change to the Port Fast mode does not take effect.
The workaround is to reset the switch.
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If a full-duplex port is assigned to more than one bridge group and an IBM Type 1 cable is disconnected, the switch might not detect a loopback.
There is no workaround.
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If a nonroot switch is bridged to a root switch through full-duplex ports using IBM Type 1 cabling, the root port on the nonroot switch might take longer to reach the STP blocking state if the cabling is disconnected and creates a loopback.
There is no workaround.
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If a dynamic port that is assigned to a VLAN is disconnected and reconnected to a different station, the VLAN of the port is not rediscovered.
The workaround is to change the port to half duplex so that the switch assigns the port to a new VLAN.
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If there are two or more Catalyst 1900 or Catalyst 2820 switches connected to a Catalyst 5000 switch by using Fast EtherChannel—and if there are two stations communicating through the Catalyst 5000 switch—the switches learn the addresses of both stations from the broadcast packets sent from those stations. Flooding of unknown unicast packets can occur if one of the stations becomes disconnected from the Catalyst 5000 switch and the other station continues to send packets to that station. The flooding stops when the switches reach the specified aging time for retaining the address of the disconnected station.
The workaround is to use the port-channel preserve-order command to preserve the frame transmission order on the switch port.
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When using the Fast EtherChannel feature with VLAN trunking between two Catalyst 1900 or Catalyst 2820 switches, changing the active link might cause flooding. You can change an active link either by changing the Port Aggregation Protocol (PAgP) port priority or by disconnecting one of the high-speed links and reconnecting it.
The workaround is to disconnect both ports to change the active link.
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If you use VTP pruning with Fast EtherChannel, losing one connection on one high-speed link prevents pruning from working properly. This does not cause connectivity problems, but flood traffic is sent to the neighboring switch (which should drop such traffic, resulting in minimal degradation to network performance). Pruning still works in the neighboring switches.
The workaround is to disconnect the remaining link and then to reconnect both links to restore proper operation of VTP pruning.
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When a Catalyst 1900 or Catalyst 2820 switch is operating at the edge of a VTP domain and is subsequently configured for VTP transparent mode, trunk ports will not be in the correct pruning state.
The workaround is to reestablish the trunk after changing the VTP mode to transparent in one of these ways:
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After you select Auto-negotiate as the 100BASE-TX port duplex mode from the Catalyst 1900 Port Management page and click Apply, Auto-negotiate appears in the Actual field while the switch and the other device negotiate the duplex mode.
The workaround is to click the Port option on the switch manager menu bar to display the final duplex state of the port.
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If you try to upgrade the module firmware from the Catalyst 2820 Switch Manager and the Module (Slot A or B) TFTP Upgrade button is not on the Console and Upgrade Configuration page, the module firmware is corrupted.
The workaround is to stop the upgrade attempt from the switch manager. Use the management console to upgrade the module firmware.
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After you select Auto-negotiate as the 100BASE-TX switch module-port duplex mode from the Catalyst 2820 Module Management page and click Apply, Auto-negotiate appears in the Actual field while the switch and the other device negotiate the duplex mode.
The workaround is to click the Module option on the switch manager menu bar to display the final duplex state of the port.
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When the switch does not have its own IP address and is a cluster member, the Telnet link on the Catalyst 1900 or Catalyst 2820 Switch Manager Home page is disabled.
The workaround is to use the rcommand member-number command from the command-switch CLI to Telnet to the switch.
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When a switch port is assigned to be the network port, unknown unicast address packets are only sent to that port. If an attached device, such as a server, is idle for longer than the specified address aging time value, the switch removes the device address from its address table. Therefore, if a network port is assigned, the switch does not forward any unknown unicast address packets destined to that device.
The workarounds are to
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You cannot use IP to manage the switch if the management VLAN is pruned.
The workaround is to be sure that the management VLAN is not pruned if VTP pruning is enabled.
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When the Fast EtherChannel feature is enabled, the spanning-tree state for the port channel is shown as N/A on the Port Configuration menu for port A or port B. (The VTP pruning statistics on the VTP Statistics Report apply to the port channel as a whole, not specifically to port A or port B.)
The workaround is to use the Fast EtherChannel Management page, the CLI, or the SNMP Bridge MIB to find out the actual state of the port channel.
Resolved Caveats in Version 9.00.05
These problems were resolved in version 9.00.05:
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Catalyst 1900 and 2820 switches can now communicate with other management VLANs even if the switch has no ARP entry in its ARP table for a default gateway or does not have a port assigned to a management VLAN.
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The MIB object IfLastChange now reports the correct time when the LinkUp/LinkDown Traps are disabled on the switch.
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The FDDI DAS module no longer incorrectly appears as an SAS module in a Catalyst 2820 switch.
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The show cdp neighbor detail command now works correctly on the switch and no longer shows only the IP address of the command switch.
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The switch no longer fails when the HTTP server is enabled and a browser tries to access the URL http://switch-ipaddr/anytext?/.
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Catalyst 1900 and 2820 switches running Enterprise software release 9.00.05 can now answer queries for the MIB object ipAdEntNetMask when you use the snmpget command.
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SNMP operations with null community strings are no longer allowed.
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If a switch is installed before the DHCP scope is configured on the DHCP server, or before the DHCP server is online the switch now completes automatic configuration through TFTP.
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Catalyst 1900 and 2820 switches now respond to ARP requests in a redundant uplink configuration where there are no access ports assigned to the management VLAN.
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Catalyst 1900 and 2820 switches no longer allow community strings ending with a numeral or an @ symbol.
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Catalyst 1900 and 2820 switches no longer allow privileged EXEC access with a user EXEC password.
Resolved Caveats in Previous Versions
This problem was resolved in version 9.00.04:
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Version 9.00.04 corrected a condition on the Catalyst 1900 and 2820 switches running Enterprise Edition firmware that caused VLAN Trunk Protocol (VTP) configuration information to be lost. The VTP mode changes from transparent or server mode to client mode after VTP parameters are configured. In version 9.00.03, these parameters were lost after the switch was reset, and the switch would revert back to server mode.
Note
This problem was resolved in version 9.00.03:
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Version 9.00.03 corrected an anomolous user-invoked system reset condition. If you reset the system through the console interface (as opposed to recycling power), it was statistically possible for a single, random port on the unit to fail to acquire link and operate properly. You would then observe a nonfunctional or dead port. Power cycling the switch corrected the problem. The software modification reset all ports in the switch so that a port cannot lock up immediately after a user-invoked reset.
This problem was resolved in version 9.00.02:
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Catalyst 1900 and 2820 switches no longer cause spanning-tree loops when UplinkFast is enabled.
These problems were resolved in version 9.00.01:
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If you issue a Get_Next_Request in an SNMP MIB list on an interface, there is no longer an extra entry at the end that does not belong.
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In a Telnet session, the paste function in the CLI configuration mode now works correctly.
These problems were resolved in version 9.00.00:
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The CDP checksum algorithm is now compatible with the Cisco IOS software. Previously, when a CDP packet had an odd number of bytes and the value of the last byte was greater than 0x80, the device sending the packet was not recognized as a neighbor.
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You can use a DEC Alpha 1000a BOOTP server to automatically assign an IP address to the switch.
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The switch can now autoconfigure from a DHCP server that is not Windows NT.
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You can use the ipNetToMediaEntry MIB object from a Catalyst 1900 WS-C1912 model.
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Whether in VTP transparent or server mode, the switch drops VTP packets from blocked ports and no longer receives and sends these packets to unblocked ports.
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The switch can use a CiscoSecure NT TACACS server to authenticate access based on the switch IP address.
Related Documentation
Use these Catalyst 1900 and Catalyst 2820 publications for firmware version 9.x with this document:
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