From: MADMAN (dave@interprise.com)
Date: Thu Jul 03 2003 - 13:30:41 GMT-3
John Matijevic wrote:
> 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.
If you have a 24 port 3550 running EMI and you configure every
interface as a L3 interface you could call all of them management
interfaces is you wish.
Dave
>
> 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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>
>
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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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