From: Michael Brooks (michaeljbrooks@gmail.com)
Date: Fri Nov 10 2006 - 12:25:07 ART
Thanks for your suggestion Ivan. I did find this best practice from cisco:
*Cisco Best Practice Recommendation:*
*Cisco recommends an explicit trunk configuration of desirable at both ends.
In this mode, network operators can trust syslog and command line status
messages that a port is up and trunking, unlike on mode, which can make a
port appear up even though the neighbor is misconfigured. In addition,
desirable mode trunk provides stability in situations where one side of the
link cannot become a trunk or drops trunk state. *
It makes sense. So I will try it.
Mike
On 11/10/06, Ivan <ivan@iip.net> wrote:
>
> In native IOS try this
> int po101
> swi mode dyn desirable
>
> In Your config CatOS switch use DTP to bring up the trunk, but Native IOS
> doesn't use it.
>
> On Thursday 09 November 2006 19:32, Michael Brooks wrote:
> > Hello everyone,
> >
> > Has anyone experienced odd behavior when creating trunks and channels
> > between a CatOS switch and a Native IOS Switch ? Is there any known
> > issues with this type of connection such as with trunk negotiation or
> with
> > the channeling? Below is a configuration that seems to be sort of
> flaky.
> > I am intermittenly seeing problems with channels and trunks between the
> > different switches. Your suggestions and comments would be greatly
> > appreciated.
> >
> > *CatOS:*
> > set trunk 1/1 desirable dot1q 1-1005,1025-4094
> > set trunk 1/2 desirable dot1q 1-1005,1025-4094
> > set port channel 1/1-2 mode desirable silent
> >
> > *Native IOS:*
> > interface Port-channel101
> > description trunk CatOS gi1/1-2
> > no ip address
> > switchport
> > switchport trunk encapsulation dot1q
> > switchport mode trunk
> > end
> > !
> > interface GigabitEthernet3/5
> > description trunk to CatOS switch g1/1
> > no ip address
> > switchport
> > switchport trunk encapsulation dot1q
> > switchport mode trunk
> > channel-group 101 mode desirable
> > end
> > !
> > interface GigabitEthernet3/6
> > description trunk to CatOS switch g1/2
> > no ip address
> > switchport
> > switchport trunk encapsulation dot1q
> > switchport mode trunk
> > channel-group 101 mode desirable
> > end
> >
> >
> > Thank you,
> > Michael Brooks
> > CCIE# 16027
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> --
> Ivan
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