June 2007
Intermediate to advanced
600 pages
18h 19m
English
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Configuring and Managing EtherChannel
The device on the other end of the EtherChannel is usually the determining factor in how the EtherChannel is configured. One design rule that must always be applied is that each of the links participating in an EtherChannel must have the same configuration. The descriptions can be different, but each of the physical links must be the same type and speed, and they must all be in the same VLAN. If they are trunks, they must all be configured with the same trunk parameters.
EtherChannel Protocols
EtherChannel will negotiate with the device on the other side of the link. Two
protocols are supported on Cisco devices. The first is the Link Aggregation Control
Protocol (LACP), which is defined in IEEE specification 802.3ad. LACP is used when
connecting to non-Cisco devices, such as servers. As an example, Solaris will negotiate
with a Cisco switch via LACP. The other protocol used in negotiating EtherChannel links
is the Port Aggregation Control Protocol (PAgP), which is a Cisco-proprietary protocol.
Since PAgP is Cisco-proprietary, it is used only when connecting two Cisco devices via
an EtherChannel. Each protocol supports two modes: a passive mode (auto in PAgP and passive
in LACP), and an active mode (desirable in PAgP and
active in LACP). Alternatively, you can set the
mode to on, thus forcing the creation of the
EtherChannel. The available protocols and modes are outlined in Figure 7-6.
Figure 7-6. EtherChannel protocols and their modes
Generally, ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.