From: Stefan Grey (examplebrain@hotmail.com)
Date: Thu Sep 22 2005 - 12:17:30 GMT-3
Thanks, but it doesn't answer my question. I think I know what do the LACP
and PAGP:) And I think and as it is done in many books the configuration for
PAGP for example on the switch is following:
int fa0/1
channel-group 1 mode desirable
switchport mode trunk
switchport trunk enc dot1q
int portchannel 1
switchport mode trunk
switchport trunk enc dot1q !!! Dot. This is the configuration.
The question is what could do explicitely the "channel-protocol pagp"
command. What is the purpuse of this command. I just read somewhere the same
config for etherchannel as above but also with the channel-protocol pagp and
now I wonder why it was there and what for. As for me the above config is
just enough to configure pagp etherchannel.
Thanks,
>From: "Schulz, Dave" <DSchulz@dpsciences.com>
>To: "Stefan Grey "
><examplebrain@hotmail.com>,<nobody@groupstudy.com>,<ccielab@groupstudy.com>
>Subject: RE: Etherchannel (channel-protocol pagp command)??
>Date: Thu, 22 Sep 2005 10:38:05 -0400
>
>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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