From: MADMAN (dave@interprise.com)
Date: Thu Jul 03 2003 - 14:31:03 GMT-3
John Matijevic wrote:
> Hi Mohit,
> You cannot shutdown the management vlan, vlan1, try it. I would not spend
> to much time on this just realize that vlan1 is the default management vlan.
> If there is something more that the question is asking please post it here.
> Sincerely,
> Matijevic
OK I'll accept your challenge since I know I can shut down VLAN 1, it
is how I access a 3512XL in the lab!!!
interface VLAN1
no ip address
no ip directed-broadcast
shutdown
!
interface VLAN64
ip address 172.28.64.4 255.255.255.0
no ip directed-broadcast
ip nat outside
!
VLAN 64 is the inband management VLAN.
Dave
> ----- Original Message -----
> From: "SHARMA,MOHIT (HP-Germany,ex1)" <mohit.sharma@hp.com>
> To: "'John Matijevic'" <matijevi@bellsouth.net>; <ccielab@groupstudy.com>
> Sent: Thursday, July 03, 2003 12:09 PM
> Subject: RE: Switchin Basics
>
>
>
>>Hi John,
>>
>>thanx for the followup, but what would then be exactly "the management
>>vlan"", If vlan 1 is shutdown and as Jonathan said there could be a number
>>of SVI's. How would the switch decide, which one to consider the
>
> management
>
>>vlan?Or is it like the default vlan the default management vlan is always
>>"1" ??
>>
>>
>>
>>-----Original Message-----
>>From: John Matijevic [mailto:matijevi@bellsouth.net]
>>Sent: Thursday, July 03, 2003 5:58 PM
>>To: Jonathan V Hays; 'SHARMA,MOHIT (HP-Germany,ex1)';
>>
>>Subject: Re: Switchin Basics
>>
>>
>>Hello Team,
>>I politely disagree with Jonathan in the following:
>>
>>>However, on the Catalyst 3550 you can have multiple "management" VLANs.
>>
>>my answer is:
>>Only one management VLAN can be administratively active at a time.
>>
>>also,
>>You cant change the default vlan 1.
>>
>>As a followup note:
>>Management interfaces and vlans is documented in the 3550 admin guide.
>
> The
>
>>management interface communicates with the switch ip address. The ip
>
> address
>
>>is associated with the management vlan. You can only have one management
>>vlan at a time. The management vlan is the vlan used to manage the switch,
>>so when you add a vlan and assign an ip address, that vlan communicates
>
> with
>
>>the management vlan.
>>Hopefully this helps clarify,
>>Sincerely,
>>Matijevic
>>
>>----- Original Message -----
>>From: "Jonathan V Hays" <jhays@jtan.com>
>>To: "'SHARMA,MOHIT (HP-Germany,ex1)'" <mohit.sharma@hp.com>;
>><ccielab@groupstudy.com>
>>Sent: Thursday, July 03, 2003 10:17 AM
>>Subject: RE: Switchin Basics
>>
>>
>>
>>>See below.
>>>
>>>
>>>>-----Original Message-----
>>>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
>>>>Behalf Of SHARMA,MOHIT (HP-Germany,ex1)
>>>>Sent: Thursday, July 03, 2003 7:22 AM
>>>>To: 'ccielab@groupstudy.com'
>>>>Subject: RE: Switchin Basics
>>>>
>>>>
>>>>Hi all,
>>>>
>>>>I know this may sound like a really stupid question from a
>>>>guy preparing for
>>>>the esteemed exam, but could someone please take out some
>>>>time to enmlighten
>>>>me. I really need to get this basics clear.
>>>>
>>>>Thanks for your understanding and cooperation.
>>>>
>>>>Smiles,
>>>>
>>>>Mohit.
>>>>-----Original Message-----
>>>>From: SHARMA,MOHIT (HP-Germany,ex1) [mailto:mohit.sharma@hp.com]
>>>>Sent: Thursday, July 03, 2003 12:54 AM
>>>>To: 'ccielab@groupstudy.com'
>>>>Subject: Switchin Basics
>>>>
>>>>
>>>>Hi All,
>>>>
>>>>This may sound like one of the basic questions for switching,
>>>>however I just
>>>>tried these on my newly acquired 3550's and am really confused.
>>>>
>>>>1.> If asked to change the default VLAN, how does it work? I
>>>>have tried
>>>>using the default vlan <x> command, but when I do sh vlan it
>>>>always gives me
>>>>the default vlan as 1. First I thought that after giving this command
>>>>changing the names would do the trick but it still allocates
>>>>the unused
>>>>ports to VLAN 1 :(
>>>>
>>>
>>>****
>>>The default VLAN on an unconfigured Cisco switch is VLAN 1. I don't
>>>think this can be changed. For an unconfigured switch, it simply means
>>>that by default all ports are a member of VLAN 1. I suppose the
>>>programmers could have alternatively assigned all ports to no VLAN at
>>>all, which would have forced the sysadmin to assign a VLAN to a port
>>>before using the switch. With a default of VLAN 1 on all ports, you can
>>>turn on the switch and immediately plug in ethernet cables and start
>>>using the switch.
>>>
>>>I think your lab scenario is really asking you to assign ports to
>>>different VLANs. Or maybe to assign a new management VLAN by creating a
>>>new switched virtual interface (SVI). See below.
>>>****
>>>
>>>
>>>
>>>>2.> What does management interface mean. If I have a number of VLAN
>>>>interfaces with IP address configured, how does the switch
>>>>decide, which one
>>>>is the management interface???IS it the default VLAN again at play???
>>>
>>>
>>>****
>>>Older IOS-type switches (e.g., 2900/3550XL, 2950, etc.) only allowed one
>>>"management" VLAN. For example, to shut down VLAN 1 as the management
>>>VLAN on a 2900/3500 XL switch you used the "management" command.
>>>
>>>However, on the Catalyst 3550 you can have multiple "management" VLANs.
>>>(Cisco does not use the term "management" very often in the 3550
>>>configuration guide.) To do this, you just create anther SVI with the
>>>"int vlan XXX" command. To disable VLAN 1 as a "management" VLAN:
>>>
>>>int vlan 1
>>> shutdown
>>>
>>>http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12113ea1/3550s
>>>cg/swint.htm#1026951
>>>
>>><quote>
>>>By default, an SVI is created for the default VLAN (VLAN 1) to permit
>>>remote switch administration. Additional SVIs must be explicitly
>>>configured. In Layer 2 mode, SVIs provide IP host connectivity only to
>>>the system; in Layer 3 mode, you can configure routing across SVIs.
>>></quote>
>>>
>>>HTH
>>>
>>>Jonathan
>>>
>>>****
>>>
>>>
>>>
>>>>Thanks as always for showing me the light :)
>>>>
>>>>Smiles,
>>>>
>>>>Mohit.
>>>>
>>>>
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-- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367"Government can do something for the people only in proportion as it can do something to the people." -- Thomas Jefferson
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