Cabletron Systems ELS100-24TX specifications Known Restrictions and Limitations

35 Industrial Way PO Box 5005 Rochester, NH 03867-5005 (603)332-9400

CUSTOMER RELEASE NOTES

16.When a 2-port fiber module was present in an ELS100-24TXM, the diagnostic tests on the fiber ports would sometimes fail. – This has been fixed.

KNOWN RESTRICTIONS AND LIMITATIONS:

1.Upgrading 1.00.0X firmware to 2.00.02 or greater erases configuration information.

When upgrading firmware from any 1.00.0X version to 2.00.02 or greater, the switch configuration information such as IP address, VLANs, etc. will be lost and must be reprogrammed. (Upgrades from version 2.00.02 to any higher version do not erase the configuration.)

2.In order to use the embedded Web Management feature when upgrading from any 1.00.0X version to

2.00.02or greater, two file downloads must be performed. First, the image file (2xxxx.dnl) must be

downloaded to the switch and then a second file (2xxxx.web) must be downloaded for Web Management. (Note: This applies only to upgrades, as new units will be configured with the appropriate files at the time

of manufacture.)

3.Certain traffic patterns may occasionally place addresses into the forwarding table that have not been actually seen by the switch. The Source MAC address of error frames (64 bytes or greater in length) is improperly learned by the switch.

4.Error and dropped packet statistics reported on the “Switch Summary and Individual Port Statistics” screen may not synchronize properly with each other; dependant on the traffic flow through the switch.

5.Broadcast frames increment the SNMP “ifOutOctets” counter for ports that have no link.

6.When new entries are made to the SNMP RMON log table, they are not done so sequentially.

7.VLAN must be enabled to use Class of Service (priority queuing).

8.ELS100-24TX: The maximum number of port based VLANs that can be configured on the switch is eight.

ELS100-24TXG/24TXM: The maximum number of port based VLANs that can be configured on

switches manufactured in week 9908 and later (and running this version of firmware) is 128. Any VLAN ID within the range of 0-4095 is valid, but only 128 VLANs can be created on the switch at one time.

(Note: Units manufactured prior to week 9908 will support only eight VLANs.)

9.The broadcast performance on one group of 8 ports (1-8, 9-16, or 17-24) is less than that of the ports on the switch; dependent on which switch cluster broadcasts are being passed to the CPU.

10.When VLAN operation on the switch is enabled, the overall throughput performance of the switch drops due to the fact that internally, each packet passing through the switch is appended with a four byte IEEE 802.1Q VLAN tag.

11.When using the port mirroring feature, the mirroring and mirrored (source and destination) ports must be in the same switch cluster.(i.e. Group of 8 ports)

12.When using port mirroring, traffic rates on the mirroring port may be less than those on the mirrored port; dependent on the traffic flow through the switch.

13.Discard address filtering rules can be overwritten. If a packet is received by the switch with a source MAC address that is the same as a static address set to be discarded, the discard rule will be overwritten, allowing packets with the source address to be forwarded through the switch.

14.When transmitting packets out of a port, the packet size statistics counters on the Port Statistics screen do not increment properly. The counters do properly increment for packets received on the port.

15.Firmware upgrades to version 2.00.XX and later on switches running boot code version 1.02 or earlier can only be made in-band via TFTP, not out-of-band via XMODEM. The Boot code version must be upgraded to 1.05 or greater for download via XMODEM.

16.The switch will execute a software reset after performing a TFTP download. The reset will occur whether or not the download was successful or failed.

2/7/00 P/N: 9032741-08 Subject to Change Without Notice Page 4 of 7