Cisco Catalyst 2950 Software Guide

10-15
Catalyst 2950 Desktop Switch Software Configuration Guide
78-11380-03
Chapter 10 Configuring the Switch Ports
Understanding the EtherChannel
Beginning in privileged EXEC mode, follow these steps to assign a Layer 2 Ethernet interface to a
Layer 2 EtherChannel:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and specify a physical
interface to configure.
Valid interfaces include physical interfaces.
Up to eight interfaces of the same type and speed can be
configured for the same group.
Step 3
channel-group channel-group-number mode
{auto [non-silent]|desirable [non-silent]|on}
Assign the interface to a channel group, and specify the PAgP
mode. The default mode is auto silent.
For channel-group-number, the range is 1 to 6. Each
EtherChannel can have up to eight compatibly configured
Ethernet interfaces.
For mode, select one of these keywords:
• auto—Enables PAgP only if a PAgP device is detected. It
places an interface into a passive negotiating state, in which
the interface responds to PAgP packets it receives but does
not initiate PAgP packet negotiation.
• desirable—Unconditionally enables PAgP. It places an
interface into an active negotiating state, in which the
interface initiates negotiations with other interfaces by
sending PAgP packets.
• on—Forces the interface to channel without PAgP. With the
on mode, a usable EtherChannel exists only when an
interface group in the on mode is connected to another
interface group in the on mode.
• non-silent—If your switch is connected to a partner that is
PAgP-capable, you can configure the switch interface for
non-silent operation. You can configure an interface with the
non-silentkeywordforuse with the auto or desirable mode.
If you do not specify non-silent with the auto or desirable
mode, silent is assumed. The silent setting is for connections
to file servers or packet analyzers; this setting allows PAgP
to operate, to attach the interface to a channel group, and to
use the interface for transmission.
For informationon compatible PAgP modes for the switch and its
partner, see the “PAgP Modes” sectiononpage10-10.
Step 4
end Return to privileged EXEC mode.
Step 5
show running-config Verify your entries.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz