Nortel Networks 350 manual Snmp MIB Support, Autosensing and Autonegotiation

BayStack 350 10/100/1000 Series Switches

SNMP MIB Support

The BayStack 350 switch supports an SNMP agent with industry standard MIBs, as well as private MIB extensions, which ensures compatibility with existing network management tools. The BayStack 350 switch supports MIB-II

(RFC 1213) and the RMON MIB (RFC 1757), which provide access to detailed management statistics. With SNMP management, you can configure SNMP traps (on individual ports) to be generated automatically for conditions such as an unauthorized access attempt or changes in a port’s operating status.

Autosensing and Autonegotiation

BayStack 350 switches are autosensing and autonegotiating devices:

•The term autosense refers to a port’s ability to sense the speed of an attached device.

•The term autonegotiation refers to a standardized protocol (IEEE 802.3u) that exists between two IEEE 802.3u-capable devices. Autonegotiation allows the BayStack 350 switch to select the best of both speed and duplex modes.

Autosensing is used when the attached device is not capable of autonegotiation or is using a form of autonegotiation that is not compatible with the IEEE 802.3u autonegotiation standard. In this case, because it is not possible to sense the duplex mode of the attached device, the BayStack 350 switch reverts to half-duplex mode.

When autonegotiation-capable devices are attached to the BayStack 350 switch, the switch ports negotiate down from 100 Mb/s speed and full-duplex mode until a supported speed and duplex mode is acknowledged by the attached device.

For more information about autosensing and autonegotiation modes, see “Autonegotiation Modes” on page 4-6.

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