EtherChannel Configuration

1. config multi interfaces at same time
  (config)# interface range fa0/21 - 24    ,or  fa0/21 , fa0/23

2. before config the new setting, the old setting in those interfaces must be remove firstly. (with command 'no')

3. there are 3 options for the channel-protocol: pagp, lacp, none
  the channel mode is depended by protocol:
   pagp:  'auto' or 'desirable'
   lacp:  'active' or 'passive'
   None: 'on'

 Note: the port-channel interfaces with channel mode marked as 'on'  will always up.

4. commands for checking etherChannel:
 - show etherchannel summary
SwitchC#show etherchannel summary
Flags:  D - down        P - in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        u - unsuitable for bundling
        U - in use      f - failed to allocate aggregator
        d - default port

Number of channel-groups in use: 4
Number of aggregators:           4

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(SU)         LACP      Fa0/22(Pd)  Fa0/24(P)
2      Po2(SU)          -        Fa0/21(Pd)  Fa0/23(P)
3      Po3(SD)          -
5      Po5(SD)          -


- show interface portchannel 1
SwitchC#show interfaces port-channel 1 etherchannel
Port-channel1   (Primary aggregator)

Age of the Port-channel   = 0d:03h:45m:04s
Logical slot/port   = 1/0          Number of ports = 2
HotStandBy port = null
Port state          = Port-channel Ag-Inuse
Protocol            =   LACP

Ports in the Port-channel:

Index   Load   Port     EC state        No of bits
------+------+------+------------------+-----------
  0     00     Fa0/22   Active             0
  0     00     Fa0/24   Active             0

Time since last port bundled:    0d:00h:54m:00s    Fa0/24
Time since last port Un-bundled: 0d:01h:21m:08s    Fa0/24

--
Just do it!
Posted by Gmail on E61