10-09-2012 05:14 AM - edited 03-07-2019 09:21 AM
Hi Friends,
I have some basic knowledge of making switch ports as 1 ethere channel. I just want to know something.
I have 4 cisco 2960 switches to which many users are connected. No vlans are the only default vlan 1 is there. Now I want to make ether channel on switch 1 whcih has 24 fast etherenet ports. Can I make port 1- 8 as one ether channel which are connected to users or i can only make ethere channel
of ports that are connectd to other switchs. If I can, how the other switchs will comnicate with the switch ports bundalled in the ether channel in switch 1. Please help me out.. Thanksss in advance.
Solved! Go to Solution.
10-09-2012 05:21 AM
Hello Shahzaib,
You can not make the port connected to normal PC user as ether channel ( Some storage/server supports ) and in your scenario you can only make etherchannel between your switches.
Once the ether channel is made, there will be another interface created called port-channel that will be having same properties like access/trunk based on your configuration
Since you have to create the channel on both switches, they can identify the etherchannel and communicate each oher
Hope this helps
Haris
Please rate all helpful post!.
10-09-2012 05:21 AM
Hello Shahzaib,
You can not make the port connected to normal PC user as ether channel ( Some storage/server supports ) and in your scenario you can only make etherchannel between your switches.
Once the ether channel is made, there will be another interface created called port-channel that will be having same properties like access/trunk based on your configuration
Since you have to create the channel on both switches, they can identify the etherchannel and communicate each oher
Hope this helps
Haris
Please rate all helpful post!.
10-09-2012 05:31 AM
HI Shahzaib,
EtherChannel is a technology-leveraging, standards-based Fast Ethernet used in parallel to provide the additional bandwidth network backbones require today. It provides flexible, scalable bandwidth with resiliency and load sharing across links for switches, router interfaces and servers. Supports up to eight links per channel.
You can take 8 ports, which are free.
for wt purpose you are creating Etherchannel:
see port channel and port configration:
Switch# configure terminal
Switch(config)# interface range gigabitethernet0/4 -5
Switch(config-if-range)# switchport mode access
Switch(config-if-range)# switchport access vlan 10
Switch(config-if-range)# channel-group 5 mode desirable
Switch(config-if-range)# end
Switch# configure terminal
Switch(config)# interface port-channel 5
Switch(config-if)# no switchport
Switch(config-if)# ip address 172.10.20.10 255.255.255.0
Switch(config-if)# end
Regards
Please rate if it helps.
10-09-2012 05:51 AM
Hello Sandeep,
your configuration example is wrong you have mixed the configuration of a L2 port channel using PAGP, and the configuration of a OSI L3 port channel.
when configuring a L3 port channel member ports are configured with
no switchport
no ip address
for switch to switch bundles a L2 port channel is more appropriate
the use of LACP is recommmended ( channel-group X mode active)
Hope to help
Giuseppe
10-09-2012 05:54 AM
Hi Giuseppe,
Thanks for correcting me.
U deserved +5 points.
just check this, is it ok or :
interface Port-channel1
description *vvvvvvv*
switchport trunk encapsulation dot1q
switchport mode trunk
interface GigabitEthernet2/0/1
Switchport trunk encapsulation dot1q
switchport mode trunk
channel-protocol lacp
channel-group 1 mode active
ip dhcp snooping trust
!
interface GigabitEthernet2/0/2
switchport trunk encapsulation dot1q
switchport mode trunk
channel-protocol lacp
channel-group 1 mode active
i hope this is ok.??
Thanks again
10-09-2012 06:15 AM
Hello Sandeep,
the port-channel interface is not configured manually, it is created by the switch automatically after having put the channel-group 1 mode active on member links.
A part from this the configuration is fine for a L2 port channel except for that ip dhcp snooping trust on one member link. gi2/0/1. member links need to be identical in configuration.
Later all changes to the list of permitted vlans for example are made on port channel interface
Hope to help
Giuseppe
10-09-2012 05:49 AM
@ harish and sandeep...
Thank you very much for your help. so now i will make etherchannel between switches.. Thanks again both of you.
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