From: Schulz, Dave (DSchulz@dpsciences.com)
Date: Thu Sep 22 2005 - 11:38:05 GMT-3
Stefan -
This should answer your question from the Doc CD. PagP is the Cisco-prop,
and, LACP is IEEE standard....
The Port Aggregation Protocol (PAgP) and Link Aggregation Control Protocol
(LACP) facilitate the automatic creation of EtherChannels by exchanging
packets between Ethernet interfaces. PAgP is a Cisco-proprietary protocol that
can be run only on Cisco switches and on those switches licensed by licensed
vendors to support PAgP. LACP is defined in IEEE 802.3ad and allows Cisco
switches to manage Ethernet channels between switches that conform to the IEEE
802.3ad protocol.
By using one of these protocols, a switch learns the identity of partners
capable of supporting either PAgP or LACP and learns the capabilities of each
interface. It then dynamically groups similarly configured interfaces into a
single logical link (channel or aggregate port); these interfaces are grouped
based on hardware, administrative, and port parameter constraints. For
example, PAgP groups the interfaces with the same speed, duplex mode, native
VLAN, VLAN range, and trunking status and type. After grouping the links into
an EtherChannel, PAgP adds the group to the spanning tree as a single switch
port.
-----Original Message-----
From: nobody@groupstudy.com
To: ccielab@groupstudy.com
Sent: 9/22/2005 8:09 AM
Subject: Etherchannel (channel-protocol pagp command)??
What is the purpose of channel-protocol pagp command???
As I think when we configure Etherchannel on the switch:
interface fa0/1
channel-group mode desiramble <- this command already sets the pagp
active
mode.
In which cases the channel-protocol pagp command may be needed could be
used???
As I read it is used to set the pagp mode :((.
The same question for channel-protocol lacp command.
thanks,
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