From: Salau, Yemi (yemi.salau@siemens.com)
Date: Sat Jul 14 2007 - 07:20:34 ART
Is the question...what is the order of config for ether channel trunk
setup?
The answers I got from you guys was...order does not matter and the phy
int
should be twins for speed/duplex.
1. Do we need to put the below commands on both phy and port channel or
only
on port channel? or will the config from port-channel inherit to the
physical interface?
"The Port-Channel inherit these from the physical interfaces provided
they are all "synched" up together, I prefer using int range command to
synch them up."
sw port trunk encap dot1q
sw mode trunk
One of the book was showing the phy int have channel-group mode command
skipping the sw commands!!
"That will be because the int are already configured for those
switchport commands"
2. The interesting thing i found is that if there is only a single phy
int in port-channel , the changes you make at phy int level are "bubbled
up " to the port channel level !!
"Same for multiple interfaces"
3. the defaults for "switchport mode ..." command is different for
switch models / version numbers !!!
3550/12.1(22)EA2 - default is "dynamic desirable"
http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/relea
se/12.1_20_ea2/command/reference/cli2.html#wp2422818
3560/3750/12.2(37) - default is "dynamic auto"
http://www.cisco.com/en/US/products/ps7077/products_command_reference_ch
apter09186a00808163f4.html#wp1948171
Thanks!
Many Thanks
Yemi Salau
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Capt.Spock
Sent: Saturday, July 14, 2007 11:00 AM
To: anthony.sequeira@thomson.com
Cc: doubleccie@yahoo.com; sadiqtanko@gmail.com; edisonmortiz@gmail.com;
wjoh71@gmail.com; ccielab@groupstudy.com
Subject: Re: Switching
Is the question...what is the order of config for ether channel trunk
setup?
The answers I got from you guys was...order does not matter and the phy
int
should be twins for speed/duplex.
1. Do we need to put the below commands on both phy and port channel or
only
on port channel? or will the config from port-channel inherit to the
physical interface?
sw port trunk encap dot1q
sw mode trunk
One of the book was showing the phy int have channel-group mode command
skipping the sw commands!!
2. The interesting thing i found is that if there is only a single phy
int
in port-channel , the changes you make at phy int level are "bubbled up
" to
the port channel level !!
3. the defaults for "switchport mode ..." command is different for
switch
models / version numbers !!!
3550/12.1(22)EA2 - default is "dynamic desirable"
http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/relea
se/12.1_20_ea2/command/reference/cli2.html#wp2422818
3560/3750/12.2(37) - default is "dynamic auto"
http://www.cisco.com/en/US/products/ps7077/products_command_reference_ch
apter09186a00808163f4.html#wp1948171
Thanks!
On 6/18/07, anthony.sequeira@thomson.com <anthony.sequeira@thomson.com>
wrote:
>
> I agree the order is not critical...a couple of more points...
>
> Do not forget about interface range configuration mode. This allows
you
> to apply a configuration to multiple interfaces at the same time.
>
> Also, I am always scared of breaking the network, so I ensure I
shutdown
> interfaces on one side of the link before the EtherChannel formation.
> You do not want one side set to EtherChannel (ON mode) and the other
> side not with both sides active, for example.
>
> The interfaces you want to EtherChannel need to be pretty much "twins"
> in their configuration. By this I mean things like same duplex and
> speed, same trunk encap, same allowed VLANs, etc.
>
> Anthony J. Sequeira
> #15626
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Peter Svidler
> Sent: Monday, June 18, 2007 7:10 PM
> To: Sadiq Yakasai; Edison Ortiz
> Cc: joh willi; ccielab@groupstudy.com
> Subject: Re: Switching
>
> I do not think the order of the configuration will really matter ,
> however having the etherchannel first will make sense so you can
> configure the trunk config under the port channel ( instead of doing
it
> more than once )
>
> you can have the etherchannel in access or trunk mode and it works
> both ways , in some situations some cutomers prefer to have the
> etherchannel connections part of single vlan (access mode ) for
> performance issues so the link does not have to carry traffic of
> multiple Vlans
>
> HTH
>
>
>
>
> Sadiq Yakasai <sadiqtanko@gmail.com> wrote:
> Guys,
>
> 1) I tried it both ways and it worked. I dont think it matters, so far
> you configure it in the right way.
> 2) I am not sure why you would want to configure an etherchannel
> between two switches and make it an access port? Not a routed port?
> Please would there be any situation when you would configure a link
> between 2 switches and not make it either a trunk or a routed link?
>
> Thanks
>
>
> On 6/18/07, Edison Ortiz wrote:
> > 1) trunk first, etherchannel second.
> >
> > 2) Yes.
> > __
> >
> > Edison Ortiz
> > (Routing & Switching, CCIE # 17943)
> >
> >
> >
> > ----- Original Message -----
> > From: "joh willi"
> > To:
> > Sent: Monday, June 18, 2007 4:45 PM
> > Subject: Switching
> >
> >
> > > SW1 3550 ---------- SW2 3560
> > >
> > > Could you answer to the following considering SW1 is connected to
> SW2?.
> > >
> > > 1. If I configure the L2 etherchannel between them, should I worry
> about
> > > trunk?. If yes, then in which order (trunk first, etherchannel
> second)
> > > the
> > > config needs to be done?
> > > 2. If I configure the L2 etherchannel between them, can I assign
> them as
> > > access port?.
> > >
> > > Thanks
> > > Joh
> > >
> > >
>
This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:40 ART