Entering Commands 53
■3cVlan.mib — 3Com VLAN MIB (43.10.1.14.1).
■3cWeb.mib — 3Com Web Management MIB (43.29.4.24).
■cb9000Mod.mib — Layer 2 and Layer 3.
MIB names and numbers are usually retained when organizations restructure their businesses; therefore, some of the 3Com Enterprise MIB names may not contain the word “3Com.”
Entering Commands
Before you enter any command, 3Com recommends that you:
■Examine all menus and submenus carefully to obtain the complete and correct command string.
■Consult the documentation for the valid minimum abbreviation for the command string.
Understanding | The autonegotiation capability on CoreBuilder 9000 Fast Ethernet and |
Autonegotiation | Gigabit Ethernet Layer 2 switching modules functions in compliance with |
| the IEEE 802.3z specification. In Gigabit Ethernet modules, |
| autonegotiation coordinates flow control parameters between local and |
| remote ports. Both ends of the Gigabit Ethernet connection must support |
| autonegotiation and have it enabled for the connection to work properly. |
| If autonegotiation is implemented or configured differently on local and |
| remote connected ports, unexpected results or link failures may result. |
| For example: |
| ■ If a Gigabit Ethernet switching module port has autonegotiation |
| enabled but the remote end of the connection does not support |
| autonegotiation or has it disabled, the local module port does not |
| come up (the module port state is |
| autonegotiation state is configuring). |
| ■ If a Gigabit Ethernet switching module port has autonegotiation |
| disabled but the remote end of the connection has autonegotiation |
| enabled, no traffic flows in either direction between the ports. |
| However, the module port state and port status still display online |
| and enabled, respectively. Also, if Spanning Tree is enabled, the |
| linkstate is up and the module port state is forwarding. |