Hi,
I don`t think the protocols are mismatched.
Quoting from the documentation:
desirable Unconditionally enable PAgP.
Desirable mode places a port into an active negotiating state in
which the port starts negotiations with other ports by sending PAgP
packets.
A channel is formed with another port group in either the desirable
or auto mode. When desirable is enabled, silent operation is the
default.
auto Enable the Port Aggregation Protocol (PAgP) only if a PAgP
device is detected.
Auto mode places a port into a passive negotiating state in which
the port responds to PAgP packets it receives but does not start PAgP
packet
negotiation. A channel is formed only with another port group in
desirable mode. When auto is enabled, silent operation is the default.
Both sides use PAgP and the right switch (Switch0) initiates the
creation of the channel. Looks perfectly legal for me besides the
issue with fa0/24 as Imad pointed out already.
Cheers,
Christian
Date: Wed, 12 Dec 2012 08:16:44 -0700
From: Sean Cook <[email protected]>
To: imad Abdallah <[email protected]>
Cc: "[email protected]" <[email protected]>,
waheed Ahmed <[email protected]>
Subject: Re: [OSL | CCIE_RS] TrunkLink Over EtherChannel
Your protocols are mismatched. The etherchannel on switch 0 will
never come up as its trying to negotiate using PagP. Switch 1 is not
using any protocol. Match both sides and correct fa0/24 on switch 0.
On 2012-12-12, at 7:41 AM, imad Abdallah <[email protected]>
wrote:
Why do you have fa0/24 defined as access port ?
[...]
On Dec 12, 2012, at 3:29 PM, "waheed Ahmed" <[email protected]>
wrote:
Hi Guys,
Am facing some problems related to VLAN and EtherChannel .
Configurations are mentioned below please guide me what i did wrong
with configurations:-
1. Switch0 and attached VLAN is okay working well.
2. EtherChannel on ports is okay and configured with Trunk
capabilities.
Left Switch configuration(Switch1)
[...]
interface FastEthernet0/21
channel-group 12 mode auto
!
interface FastEthernet0/22
channel-group 12 mode auto
!
interface FastEthernet0/23
channel-group 12 mode auto
!
interface FastEthernet0/24
channel-group 12 mode auto
[...]
Right Switch configuration(Switch0)
[...]
interface FastEthernet0/21
channel-group 12 mode desirable
!
interface FastEthernet0/22
channel-group 12 mode desirable
!
interface FastEthernet0/23
channel-group 12 mode desirable
!
interface FastEthernet0/24
channel-group 12 mode desirable
switchport mode access
!
[...]
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