From: Weidong Xiao (Weidong.Xiao@vi.net)
Date: Wed Jan 14 2004 - 12:18:31 GMT-3
Because I set channel group mode to on, no PAGP date unit between switches could have exchanged. So channel-group number mismatching between switches by itself didn't matter.
But I set allowed vlans on port-channel 10 on both swithes. So the real like----port-channe 10 to port-channel 11----wasn't happy with that, and caused unpredictable behavior.
Thanks again, Daniel.
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Weidong Xiao
> Sent: 14 January 2004 12:21
> To: Daniel Sheedy; ccielab@groupstudy.com
> Subject: RE: channel group number's significancy domain
>
>
> Thank you Daniel.
>
> I was and am pretty sure that the channel group number is
> only local significant. Before my post, I checked the command
> and config guide again. But the part that you quoted does not
> nessaryly mean the number is local signicante.
>
> Actually I configed a port-channel between two 6500 and used
> different channel-group number (typo!!!!, in production), and
> it worked fine. There days later eigrp neighbor between 2
> 6500s began flapping. After changed to same channel-group
> number, the problem disappeared.
>
> So I'm still not 100% sure that channel group number is only
> locally significant.
>
> Cheers,
> Weidong
>
>
> > -----Original Message-----
> > From: Daniel Sheedy [mailto:dansheedy@gmx.net]
> > Sent: 14 January 2004 11:38
> > To: ccielab@groupstudy.com
> > Cc: Weidong Xiao
> > Subject: Re: channel group number's significancy domain
> >
> >
> > Hi Weidong,
> >
> > If you look at this link below, you will see a paragraph a
> > little further
> > down:
> >
> > http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/1211
> > 9ea1/3550cr/cli1.htm#1860162
> >
> > "Any configuration or attribute changes you make to the port-channel
> > interface are propagated to all interfaces within the same
> > channel group as
> > the port channel (for example, configuration changes are also
> > propagated to
> > the physical interfaces that are not part of the port
> > channel, but are part
> > of the channel group)."
> >
> > So, the number is locally significant, to group together
> > interfaces that on
> > the same switch.
> >
> > Dan Sheedy
> >
> > ----- Original Message -----
> > From: "Weidong Xiao" <Weidong.Xiao@vi.net>
> > To: <ccielab@groupstudy.com>
> > Sent: Wednesday, January 14, 2004 12:23 PM
> > Subject: channel group number's significancy domain
> >
> >
> > > Hi,
> > >
> > > If I config layer 2 channel-groups between 2 switches,
> > using different
> > channel group numbers between them (sw1 use 10 and sw2 use
> > 11, like below),
> > will the channel work?
> > >
> > > The question can be express as: is the channel group number only
> > significant on the switch or between switches?
> > >
> > > Thanks in advance,
> > > Weidong
> > >
> > >
> > > --------------------------------------
> > > SW1:
> > > interface GigabitEthernet0/1
> > > switchport
> > > switchport trunk encapsulation isl
> > > switchport mode trunk
> > > channel-group 11 mode on
> > > !
> > > interface GigabitEthernet0/2
> > > switchport
> > > switchport trunk encapsulation isl
> > > switchport mode trunk
> > > channel-group 11 mode on
> > > ---------------------------------------
> > > SW2:
> > > interface GigabitEthernet0/1
> > > switchport
> > > switchport trunk encapsulation isl
> > > switchport mode trunk
> > > channel-group 10 mode on
> > > !
> > > interface GigabitEthernet0/2
> > > switchport
> > > switchport trunk encapsulation isl
> > > switchport mode trunk
> > > channel-group 10 mode on
> > >
> > >
> > ______________________________________________________________
> > _________
> > > Please help support GroupStudy by purchasing your study
> > materials from:
> > > http://shop.groupstudy.com
> > >
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
>
> ______________________________________________________________
> _________
> Please help support GroupStudy by purchasing your study
> materials from:
> http://shop.groupstudy.com
>
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Mon Feb 02 2004 - 09:07:44 GMT-3