CCNP TSHOOT CHAPTER 6 (ETHERCHANNEL)

CCNP TSHOOT CHAPTER 6 (ETHERCHANNEL)
10. What are the configuration steps to make etherchannel ?
11. What are the troubleshooting steps of etherchannel ?
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Solution:
10. What are the configuration steps to make etherchannel ?
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! Mirror configuration on both sides of switches
!
default intetface range fa0/1 - 6
interface range fa0/1 - 6
shutdown
!
do sh int status | in disable
!
switchport  trunk encapsulation dot11q
switchport  mode trunk
switchport trunk allowed vlan 10,20,30
channel-group 1 mode active
no shut
!
do debug etherchannel
! look at the status
show inter status | in trunk
sh int p01 switchport
!
! see the interfaces in bundle
!
sh etherchannel summary
sh interface trunk
sh spanning-tree vlan 10
!
! no blocking for sw1 & sw2 , for spanning tree perspective:
# sh etherchannel load-balance
( src-mac) by default
! use the command "port-channel load-balance " to change the default behaviour
! not working etherchannel

11. What are the troubleshooting steps of etherchannel ?
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check on both the switches
1. physical layer is working :
   show cdp neighbors
2. show etherchannel summary : po1(SD) in down state
3. sh inter po1 switchport ( operationally down)
4. may be switches uses different protocol like pagp & lacp
sh run | in FashEthernet|channel-group
! remove the auto-created po1 int
int range fa0/1- 6
shut
channel-group 1 mode active
no shut
# sh etherchannel summary  (now it is working)
some more commands:
sh int po1 switchport | ex private-vlan|Unknow
sh interface trunk
Note: but in other switch it only forward 10,20 vlans instead of 10,20,30
lacp allow this misconfiguration. we have to correct this
int por 1
swi trunk allowed vlan add 20
!
now it will work
!
do sh int trunk
!
so all the commands that is in po1 they have inherited on physical interface.