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I've been wrangling with connecting a Catalyst 4006 (running CatOS) to
a Cisco GbESM switch module (running IOS) in an IBM BladeCenter.

One area in which I'm still not sure how everything "fits together" is
in terms of VLANs (native and not), trunking and 802.1q. The problems
stem from the way the GbESM modules in the BladeCenters are setup, but
I'm temporarily unable to change how they work. Specifically, the
GbESM ships with it's management ports in VLAN 1 and all other ports
in VLAN 2. Unfortunately for me, all the ports on my Catalyst 4006 are
in VLAN 1.

If I don't set dot1q to "off", I get this when (in CatOS) when I try
and connect the GbESM to the Catalyst:

CAT4000-1> (enable) sh port 4/20
* = Configured MAC Address

Port Name Status Vlan Level Duplex Speed
Type
----- ------------------ ---------- ---------- ------ ------ -----
------------
4/20 connected trunk normal a-full a-1Gb
10/100/1000

Note that the VLAN status is "trunk". In this example, if the VLAN
status is "trunk", I am unable to pass any data to the BladeCenter --
I presume that it's expecting traffic on VLAN 2, and it's only
receiving traffic on VLAN 1 (which is what the 4006 has all of its
ports in) so it's not receiving any data. However, if I turn off dot1q
(using this command: set trunk 4/20 off dot1q 1-1005,1025-4094), on
the port connecting the two switches, I get this:

CAT4000-1> (enable) sh port 4/20
* = Configured MAC Address

Port Name Status Vlan Level Duplex Speed
Type
----- ------------------ ---------- ---------- ------ ------ -----
------------
4/20 connected 1 normal a-full a-1Gb
10/100/1000

And now everything works fine. My question is, what exactly is the
"set trunk 4/20 off dot1q 1-1005,1025-4094" command accomplishing?
>From CatOS, I can see this warning: "2007 Jan 30 07:00:33 EST -05:00
%CDP-4-NVLANMISMATCH:Native vlan mismatch detected on port 4/20". Am I
to presume that the dot1q command effectively tells the 4006 to ignore
the VLANs that it's seeing, and just pretend everything is in VLAN 1?
I suppose my ultimate question is, why does it work this way but no
others?

I have a reasonable idea of how VLANs work, but when it comes to
trunking and 802.1q I fear that I am getting a little lost. Any
replies helping to clarify this would be, by me, appreciated!

TIA and HAND,


Chris

Hello Chris ,
I'm jun from Japan
I set up a GbESM switch modulein an IBM BladeCenter H today.
I study them a little and hava an idea.

Probably,
Catalyst 4006 send VLAN info to BladeCenter as Vlan 1,
GbESM external port drop all data belonging to Vlan1, because vlan 1 is used
for management
module.
By setting dot1q to "off", 4006 will not send VLAN info with data.
If GbESM recieved that data which don't have Vlan info, GbESM add Vlan info
to Vlan2.
(external port was set to access vlan 2)
so connection can be established.

Probably





"Chris" <> wrote in message
news: ps.com...
> I've been wrangling with connecting a Catalyst 4006 (running CatOS) to
> a Cisco GbESM switch module (running IOS) in an IBM BladeCenter.
>
> One area in which I'm still not sure how everything "fits together" is
> in terms of VLANs (native and not), trunking and 802.1q. The problems
> stem from the way the GbESM modules in the BladeCenters are setup, but
> I'm temporarily unable to change how they work. Specifically, the
> GbESM ships with it's management ports in VLAN 1 and all other ports
> in VLAN 2. Unfortunately for me, all the ports on my Catalyst 4006 are
> in VLAN 1.
>
> If I don't set dot1q to "off", I get this when (in CatOS) when I try
> and connect the GbESM to the Catalyst:
>
> CAT4000-1> (enable) sh port 4/20
> * = Configured MAC Address
>
> Port Name Status Vlan Level Duplex Speed
> Type
> ----- ------------------ ---------- ---------- ------ ------ -----
> ------------
> 4/20 connected trunk normal a-full a-1Gb
> 10/100/1000
>
> Note that the VLAN status is "trunk". In this example, if the VLAN
> status is "trunk", I am unable to pass any data to the BladeCenter --
> I presume that it's expecting traffic on VLAN 2, and it's only
> receiving traffic on VLAN 1 (which is what the 4006 has all of its
> ports in) so it's not receiving any data. However, if I turn off dot1q
> (using this command: set trunk 4/20 off dot1q 1-1005,1025-4094), on
> the port connecting the two switches, I get this:
>
> CAT4000-1> (enable) sh port 4/20
> * = Configured MAC Address
>
> Port Name Status Vlan Level Duplex Speed
> Type
> ----- ------------------ ---------- ---------- ------ ------ -----
> ------------
> 4/20 connected 1 normal a-full a-1Gb
> 10/100/1000
>
> And now everything works fine. My question is, what exactly is the
> "set trunk 4/20 off dot1q 1-1005,1025-4094" command accomplishing?
> >From CatOS, I can see this warning: "2007 Jan 30 07:00:33 EST -05:00
> %CDP-4-NVLANMISMATCH:Native vlan mismatch detected on port 4/20". Am I
> to presume that the dot1q command effectively tells the 4006 to ignore
> the VLANs that it's seeing, and just pretend everything is in VLAN 1?
> I suppose my ultimate question is, why does it work this way but no
> others?
>
> I have a reasonable idea of how VLANs work, but when it comes to
> trunking and 802.1q I fear that I am getting a little lost. Any
> replies helping to clarify this would be, by me, appreciated!
>
> TIA and HAND,
>
>
> Chris
>

On Jan 30, 8:01 am, "Jun" <juntaroo2...@yahoo.co.jp> wrote:
> Hello Chris ,
> I'm jun from Japan
> I set up a GbESM switch modulein an IBM BladeCenter H today.
> I study them a little and hava an idea.
>
> Probably,
> Catalyst 4006 send VLAN info to BladeCenter as Vlan 1,
> GbESM external port drop all data belonging to Vlan1, because vlan 1 is used
> for management
> module.
> By setting dot1q to "off", 4006 will not send VLAN info with data.
> If GbESM recieved that data which don't have Vlan info, GbESM add Vlan info
> to Vlan2.
> (external port was set to access vlan 2)
> so connection can be established.

Arigato gozaimasu Jun! How have you connected your GbESM, do you have
the ports in VLAN 1 or VLAN 2? I would like all ports to be in the
same VLAN, but I do not know if it is possible.


Chris

>
> Probably
>
> "Chris" <chriswalt...@gmail.com> wrote in messagenews: glegroups.com...
>
> > I've been wrangling with connecting a Catalyst 4006 (running CatOS) to
> > a Cisco GbESM switch module (running IOS) in an IBM BladeCenter.
>
> > One area in which I'm still not sure how everything "fits together" is
> > in terms of VLANs (native and not), trunking and 802.1q. The problems
> > stem from the way the GbESM modules in the BladeCenters are setup, but
> > I'm temporarily unable to change how they work. Specifically, the
> > GbESM ships with it's management ports in VLAN 1 and all other ports
> > in VLAN 2. Unfortunately for me, all the ports on my Catalyst 4006 are
> > in VLAN 1.
>
> > If I don't set dot1q to "off", I get this when (in CatOS) when I try
> > and connect the GbESM to the Catalyst:
>
> > CAT4000-1> (enable) sh port 4/20
> > * = Configured MAC Address
>
> > Port Name Status Vlan Level Duplex Speed
> > Type
> > ----- ------------------ ---------- ---------- ------ ------ -----
> > ------------
> > 4/20 connected trunk normal a-full a-1Gb
> > 10/100/1000
>
> > Note that the VLAN status is "trunk". In this example, if the VLAN
> > status is "trunk", I am unable to pass any data to the BladeCenter --
> > I presume that it's expecting traffic on VLAN 2, and it's only
> > receiving traffic on VLAN 1 (which is what the 4006 has all of its
> > ports in) so it's not receiving any data. However, if I turn off dot1q
> > (using this command: set trunk 4/20 off dot1q 1-1005,1025-4094), on
> > the port connecting the two switches, I get this:
>
> > CAT4000-1> (enable) sh port 4/20
> > * = Configured MAC Address
>
> > Port Name Status Vlan Level Duplex Speed
> > Type
> > ----- ------------------ ---------- ---------- ------ ------ -----
> > ------------
> > 4/20 connected 1 normal a-full a-1Gb
> > 10/100/1000
>
> > And now everything works fine. My question is, what exactly is the
> > "set trunk 4/20 off dot1q 1-1005,1025-4094" command accomplishing?
> > >From CatOS, I can see this warning: "2007 Jan 30 07:00:33 EST -05:00
> > %CDP-4-NVLANMISMATCH:Native vlan mismatch detected on port 4/20". Am I
> > to presume that the dot1q command effectively tells the 4006 to ignore
> > the VLANs that it's seeing, and just pretend everything is in VLAN 1?
> > I suppose my ultimate question is, why does it work this way but no
> > others?
>
> > I have a reasonable idea of how VLANs work, but when it comes to
> > trunking and 802.1q I fear that I am getting a little lost. Any
> > replies helping to clarify this would be, by me, appreciated!
>
> > TIA and HAND,
>
> > Chris

Hi Chris,

I'm not sure this is your question.
my English problem
I setup GbESM via the management module (192.168.70.125 default )
Management module's web interface have a web interface and telnet session to
GbESM
It is not able to access GbESM via External port by default .
Workaround is create another VLAN ( ex VLAN 10)
Give the ip address to the VLAN 10,so we can access to GbESM via external
port.


"Chris" <> wrote in message
news: oups.com...
> On Jan 30, 8:01 am, "Jun" <juntaroo2...@yahoo.co.jp> wrote:
> > Hello Chris ,
> > I'm jun from Japan
> > I set up a GbESM switch modulein an IBM BladeCenter H today.
> > I study them a little and hava an idea.
> >
> > Probably,
> > Catalyst 4006 send VLAN info to BladeCenter as Vlan 1,
> > GbESM external port drop all data belonging to Vlan1, because vlan 1 is
used
> > for management
> > module.
> > By setting dot1q to "off", 4006 will not send VLAN info with data.
> > If GbESM recieved that data which don't have Vlan info, GbESM add Vlan
info
> > to Vlan2.
> > (external port was set to access vlan 2)
> > so connection can be established.
>
> Arigato gozaimasu Jun! How have you connected your GbESM, do you have
> the ports in VLAN 1 or VLAN 2? I would like all ports to be in the
> same VLAN, but I do not know if it is possible.
>
>
> Chris
>
> >
> > Probably
> >
> > "Chris" <chriswalt...@gmail.com> wrote in
messagenews: glegroups.com...
> >
> > > I've been wrangling with connecting a Catalyst 4006 (running CatOS) to
> > > a Cisco GbESM switch module (running IOS) in an IBM BladeCenter.
> >
> > > One area in which I'm still not sure how everything "fits together" is
> > > in terms of VLANs (native and not), trunking and 802.1q. The problems
> > > stem from the way the GbESM modules in the BladeCenters are setup, but
> > > I'm temporarily unable to change how they work. Specifically, the
> > > GbESM ships with it's management ports in VLAN 1 and all other ports
> > > in VLAN 2. Unfortunately for me, all the ports on my Catalyst 4006 are
> > > in VLAN 1.
> >
> > > If I don't set dot1q to "off", I get this when (in CatOS) when I try
> > > and connect the GbESM to the Catalyst:
> >
> > > CAT4000-1> (enable) sh port 4/20
> > > * = Configured MAC Address
> >
> > > Port Name Status Vlan Level Duplex Speed
> > > Type
> > > ----- ------------------ ---------- ---------- ------ ------ -----
> > > ------------
> > > 4/20 connected trunk normal a-full a-1Gb
> > > 10/100/1000
> >
> > > Note that the VLAN status is "trunk". In this example, if the VLAN
> > > status is "trunk", I am unable to pass any data to the BladeCenter --
> > > I presume that it's expecting traffic on VLAN 2, and it's only
> > > receiving traffic on VLAN 1 (which is what the 4006 has all of its
> > > ports in) so it's not receiving any data. However, if I turn off dot1q
> > > (using this command: set trunk 4/20 off dot1q 1-1005,1025-4094), on
> > > the port connecting the two switches, I get this:
> >
> > > CAT4000-1> (enable) sh port 4/20
> > > * = Configured MAC Address
> >
> > > Port Name Status Vlan Level Duplex Speed
> > > Type
> > > ----- ------------------ ---------- ---------- ------ ------ -----
> > > ------------
> > > 4/20 connected 1 normal a-full a-1Gb
> > > 10/100/1000
> >
> > > And now everything works fine. My question is, what exactly is the
> > > "set trunk 4/20 off dot1q 1-1005,1025-4094" command accomplishing?
> > > >From CatOS, I can see this warning: "2007 Jan 30 07:00:33 EST -05:00
> > > %CDP-4-NVLANMISMATCH:Native vlan mismatch detected on port 4/20". Am I
> > > to presume that the dot1q command effectively tells the 4006 to ignore
> > > the VLANs that it's seeing, and just pretend everything is in VLAN 1?
> > > I suppose my ultimate question is, why does it work this way but no
> > > others?
> >
> > > I have a reasonable idea of how VLANs work, but when it comes to
> > > trunking and 802.1q I fear that I am getting a little lost. Any
> > > replies helping to clarify this would be, by me, appreciated!
> >
> > > TIA and HAND,
> >
> > > Chris
>

Hi Chris,
Long thread, and I'm not sure exactly where you are at on this. Did yo
get your questions answered? There is an IBM red paper that might be o
help with your questions at:
http://www.redbooks.ibm.com/Redbooks.../REDP3869.html
Section 5.3 talks about how to select a management path for the IGES
(recommend over the MM uplinks, NOT over the IGESM uplinks). Section
discusses data connectivity for the IGESM uplinks, but does not includ
connecting the IGESM to a CatOS device upstream (this can be done, bu
you do have to understand the ways to do it, which would require mor
information).
Let me know if you’re still stuck and I will try to assist.
Thanks, Mat

--
Matt Slavi
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