Multilink Trunking; 302401-D Rev 00; Port Mirroring; Autosensing And Autonegotiation - Nortel BayStack 450 Using Manual

Using the BayStack 450 10/100/1000 Series Switch

MultiLink Trunking

The MultiLink Trunking feature allows you to group multiple ports (up to four)
together when forming a link to another switch or server, thus increasing
aggregate throughput of the interconnection between two devices, up to 800 Mb/s
in full-duplex mode. BayStack 450 switches can be configured with up to six
MultiLink Trunks. The trunk members can be configured within a single unit in
the stack or distributed between any of the units within the stack configuration
(distributed trunking).
For more information about the MultiLink Trunking feature, see
Trunks" on

Port Mirroring

The port mirroring feature (sometimes referred to as conversation steering) allows
you to designate a single switch port as a traffic monitor for up to two specified
ports or two media access control (MAC) addresses. You can specify port-based
monitoring, where all traffic on specified ports is monitored, or address-based
monitoring, where traffic between specified MAC addresses is monitored. You
can attach a probe device (such as a Nortel Networks StackProbe, or equivalent) to
the designated monitor port.
For more information about the port mirroring feature, see
(Conversation

Autosensing and Autonegotiation

BayStack 450 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 450 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 450 switch reverts to
half-duplex mode.
1-16
page 1-57.
Steering)" on page 1-76.
"MultiLink
"Port Mirroring

302401-D Rev 00