Either Channel Question

bravealikhanbravealikhan ■□□□□□□□□□ Posts: 2Registered Users ■□□□□□□□□□
Hi

I have two Cisco 2960 Switches (in lab environment, named as Sw1 & Sw2), I connected both switches via two Giga 0/1 & 0/2 with Cross over cable.

On Switch1 i did the following configuration to make an either channel:

Sw-1:

Config t
interface range giga 0/1 - 2
interface mode trunk
channel-group 1 mode desirable

One Sw-2

Config t
interface range giga 0/1 - 2
interface mode trunk
channel-group 1 mode desirable

When i see show ip interface bri on switch 1:

it show:

Giga 1 is up up
giga 2 is status up protocl down
port-channel1 up up

I have attached two screen shot of Show ip interface bri
and
show interface port-channel 1 etherchannel


I'll appreciate if someone guide how do i properly configure Etherchannel.... do i need to make a trunk link or either channel can work without trunking...

Thanks

Regards

Ali

Comments

  • HondabuffHondabuff ■■■□□□□□□□ Posts: 667Member ■■■□□□□□□□
    Here is the down and dirty way with enabling PAGP or LACP.

    Switch>en
    Switch#conf t
    Switch(config)#int range gigabitEthernet 0/1 - 2
    Switch(config-if-range)#shut

    Switch(config-if-range)#
    %LINK-5-CHANGED: Interface GigabitEthernet0/1, changed state to administratively down
    %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down
    %LINK-5-CHANGED: Interface GigabitEthernet0/2, changed state to administratively down
    %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/2, changed state to down

    Switch(config-if-range)#switchport mode trunk
    Switch(config-if-range)#channel-group 1 mode on
    Switch(config-if-range)#
    Creating a port-channel interface Port-channel 1
    Switch(config-if-range)#no shut
    %LINK-5-CHANGED: Interface GigabitEthernet0/1, changed state to up
    %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up
    %LINK-5-CHANGED: Interface Port-channel 1, changed state to up
    %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel 1, changed state to up
    %LINK-5-CHANGED: Interface GigabitEthernet0/2, changed state to up
    %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/2, changed state to up
    Switch(config-if-range)#
    Switch(config-if-range)#exit
    Switch#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 - in use f - failed to allocate aggregator
    u - unsuitable for bundling
    w - waiting to be aggregated
    d - default port

    Number of channel-groups in use: 1
    Number of aggregators: 1
    Group Port-channel Protocol Ports
    +
    +
    +
    1 Po1(SU) - Gig0/1(P) Gig0/2(P)
    “The problem with quotes on the Internet is that you can’t always be sure of their authenticity.” ~Abraham Lincoln
  • dsgmdsgm ■■■□□□□□□□ Posts: 228Member ■■■□□□□□□□
    If i remember correctly it should not be in trunk, or doesnt need to be, i may be wrong
  • HondabuffHondabuff ■■■□□□□□□□ Posts: 667Member ■■■□□□□□□□
    dsgm wrote: »
    If i remember correctly it should not be in trunk, or doesnt need to be, i may be wrong

    That's the whole point of Etherchannel is to make a aggregated trunk port of multiple links up to 8.
    You might be thinking of a L3 Portchannel where you assign the portchannel an IP address.
    “The problem with quotes on the Internet is that you can’t always be sure of their authenticity.” ~Abraham Lincoln
  • dsgmdsgm ■■■□□□□□□□ Posts: 228Member ■■■□□□□□□□
    Hondabuff wrote: »
    That's the whole point of Etherchannel is to make a aggregated trunk port of multiple links up to 8.
    You might be thinking of a L3 Portchannel where you assign the portchannel an IP address.

    you are correct sir
  • bravealikhanbravealikhan ■□□□□□□□□□ Posts: 2Registered Users ■□□□□□□□□□
    Hi, thanks for your reply,

    I tried the above commands but result was same.. on GigabitEthernet ports

    But when i tried following commands on FastEthernet 23-24 to make an EtherChannel and its work fine,

    SW-1:

    # Interface range FastEthernet 0/23 - 24
    # channel-protocol PaGP
    # channel-group 1 mode desirable

    SW-2:

    # Interface range FastEthernet 0/23 - 24
    # channel-protocol PaGP
    # channel-group 1 mode desirable


    Why i am not be able to bundled on GigabitEthernet Ports?
  • HondabuffHondabuff ■■■□□□□□□□ Posts: 667Member ■■■□□□□□□□
    What version of Packet tracer? I'm using 6.1.0.0120 and it works fine on the gig ports.
    “The problem with quotes on the Internet is that you can’t always be sure of their authenticity.” ~Abraham Lincoln
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