4 Server: NetWare teaming NetWare* 4.1x Adapter Teaming Installation Notes ================================================ Location of driver: \NWSERVER\AFT.NLM NOTES: AFT is supported on NetWare 4.10 and 4.11 only. Overview -------- The PRO/100+ adapter provides several options for increasing throughput and fault tolerance when running NetWare 4.1x or newer: Adapter Fault Tolerance (AFT) - creates a team of 2 - 4 adapters to provide automatic redundancy for your adapter. If the primary adapter fails, a secondary takes over. Adaptive Load Balancing (ALB) - creates a team of 2 - 4 adapters to increase transmission throughput. Also includes AFT option. Works with any 100BASE-TX switch. Fast EtherChannel* (FEC) - creates a team of 2 - 4 adapters to increase transmission and reception throughput. Also includes AFT option. Requires a Cisco switch with FEC capability. A minimum of two (2) adapter cards must be configured in a team for the AFT.NLM to bind. The AFT.NLM must be loaded prior to loading any LAN driver. For more information on AFT, ALB or FEC see the Adapter Teaming readme file (TEAMING.TXT). Common load and bind statements for AFT, ALB and FEC modes ---------------------------------------------------------- The following statements will be referenced for all modes. The slot numbers on your server may differ from the example given. ;- Load AFT.NLM (Must be loaded before the lan driver is loaded.) load aft ;- Load LAN Driver on 1st Adapter load e100b slot=4 frame=ethernet_802.2 name=pri_802.2 load e100b slot=4 frame=ethernet_802.3 name=pri_802.3 load e100b slot=4 frame=ethernet_snap name=pri_snap load e100b slot=4 frame=ethernet_ii name=pri_ii ;- Load LAN Driver on 2nd Adapter load e100b slot=5 frame=ethernet_802.2 name=sec_802.2 load e100b slot=5 frame=ethernet_802.3 name=sec_802.3 load e100b slot=5 frame=ethernet_snap name=sec_snap load e100b slot=5 frame=ethernet_ii name=sec_ii ;- Bind ipx to 1st adapter bind ipx pri_802.2 net=2 bind ipx pri_802.3 net=3 bind ipx pri_snap net=5 bind ip pri_ii addr=127.0.0.1 mask=255.255.255.0 ;- Use only one of the following commands depending on the ;- mode desired. Details of each command follow. ;- For AFT mode aft bind 4 5 ;- For ALB mode aft balance 4 5 ;- For FEC mode aft fec 4 5 Upon successful invocation, the following message is displayed: AFT Group has been created with primary adapter in slot X. It will be activated upon completion of network topology test. Adapter Fault Tolerance Mode ============================ Adapter Fault Tolerance (AFT) provides Adapter redundancy for two PRO/100+ adapters. When configured, these are set up as a primary and secondary PRO/100+ adapter. If the primary loses communication with the hub/switch, the secondary automatically takes over. The secondary adapter will take over for such reasons as cable connection problems, switch or hub port failure or adapter failure. Format: AFT BIND PrimarySlotNumber SecondarySlotNumber Example: aft bind 4 5 AFT NLM can also be bound by specifying logical names. For example: AFT NAMEBIND pri_802.2 sec_802.2 Note: Only one name from each adapter need to be bound. Adaptive Load Balancing Mode ============================ Adaptive Load Balancing (ALB) increases transmission throughput and provides adapter redundancy. When configured, there is a team of 2 - 4 adapters. One adapter is used for receiving and transmitting, all other team members transmit only. Includes AFT option in that if the primary (RxTx) adapter fails, one of the secondary adapters will take over that function. ALB works with any 100BASE-TX switch. Format: AFT BALANCE PrimarySlotNumber SecondarySlotNumber Example: AFT BALANCE 4 5 Adapters can also be bound to Adaptive Load Balance mode by specifying logical names in the bind command Format: AFT BALANCE NAMEBIND PrimaryName SecondaryName Example: AFT BALANCE NAMEBIND pri_802.2 sec_802.2 Note: Only one name from each adapter need to be bound. AFT will report the number of adapters in the team. For additional adapters, load the lan drivers similarly to the second adapter then bind aft to all adapters. Example: AFT BALANCE 4 5 6 7 Fast EtherChannel* Mode ======================= Fast EtherChannel* (FEC) increases receive and transmit throughput and provides adapter redundancy. When configured, there is a team of 2 to 4 adapters. All adapters are capable of receiving and transmitting. FEC includes the AFT option. Note: This feature requires a Cisco switch with FEC capability. Format: AFT FEC PrimarySlotNumber SecondarySlotNumber Example: AFT FEC 4 5 Adapters can also be bound to Fast EtherChannel by specifying logical names in the bind command. For example: AFT FEC NAMEBIND pri_802.2 sec_802.2 For additional adapters load the lan drivers similarly to the second adapter then bind aft to all adapters. Example: AFT FEC 4 5 6 7 Please refer to the documentation that came with your Cisco switch for instructions on configuring Fast EtherChannel on the switch. Additional Information ====================== Following are some commands that can be helpful in configuring or troubleshooting Adapter Fault Tolerance. Usually the default values are suitable for most networks. Command: AFT BIND, AFT Namebind, AFT Balance, AFT Balance Namebind ------------------------------------------------------------------ Error Conditions: If you receive the error message: "Failed to create AFT group. Make sure that the drivers for supported adapters are loaded, primary adapter is bound to protocols and secondary adapter is not bound to any protocols." Check the following: 1 The slot number is valid for the primary and secondary adapter. 2 The primary adapter has a protocol stack bound to it. 3 The secondary adapter is not bound to a protocol stack. 4 AFT is not being bound to an unsupported adapter. Command: AFT FEC, AFT FEC Namebind --------------------------------- Error Conditions: If you receive the error message: "LAN driver loopback error detected. Driver for network x received its own packet." Check the following: 1 All adapters are plugged into a Cisco Switch blade that supports FEC and the switch is properly configured. Command: AFT RESET SLOT ----------------------- Description: Used for issuing a hardware reset to the slot in the system. This command is particularly useful after a transceiver failure has happened and the user is trying to correct the problem. Format: AFT RESET SLOT SlotNumber Example: AFT RESET SLOT 10001 Command: AFT LINK TIMEOUT ------------------------- Description: Used for setting the link timeout value. During the binding process, AFT does a network topology test for a short period of time before creating an Adapter Fault Tolerance group. This test ensures that both cards are connected to the same network segment, and that they can properly transfer data. The default value for this parameter is 5 seconds. When using AFT with certain Fast Ethernet switches, AFT may fail to create the group within the five second timeout. In this case, the timeout should be extended to allow the switch to begin passing traffic. The recommended value is 40 seconds for Catalyst* 5000 and other Cisco switches. This command must be issued before the AFT BIND command. Format: AFT LINK TIMEOUT TimeoutValue Example: AFT LINK TIMEOUT 40 Command: AFT STATUS ------------------- Description: Displays the current ACTIVE status for the primary and secondary adapters in an AFT/ALB/FEC team. Format: AFT STATUS Example: AFT STATUS Command: AFT SET FEC ALERT ON ----------------------------- Description: By default, alert messages in FEC mode are OFF. This command will turn the logging functionality on for FEC. AFT relies on receiving traffic to determine the state of an adapter in the team. On fairly quiet networks, this may cause the error log to fill with spurious messages. While AFT delays logging these status changes for two minutes, Fault Tolerance and Load Balancing algorithms are still functioning. Note: event logging for AFT and ALB is always on and cannot be shut off. Format: AFT SET FEC ALERT ON Command: AFT SET FEC ALERT OFF ------------------------------ Description: This command is used to disable event logging (for FEC only) when it had previously been turned on manually. Format: AFT SET FEC ALERT OFF Troubleshooting AFT ------------------- Symptom AFT reports adapter as inactive. Cause When AFT detects the adapter status as inactive, that adapter is still a member of the team, though an inactive member. When the situation is resolved and AFT receives an indication that the adapter is functioning normally again, it will output a message stating "Detected a status change for adapter in slot x". At this point, that adapter can take over as Primary adapter once again, should the need arise. Symptom Adapters swap from being active to inactive every few seconds. Cause In AFT or ALB mode, the AFT.NLM checks the status of the other team members by passing probe packets to the other members. Connecting teamed adapters to different switches may introduce a delay in probe responses and the AFT.NLM will inactivate an adapter. * Third-party trademarks are the property of their respective owners.Download Driver Pack
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