Here is a repost of one of the posts I just did yesterday.
Just FYI to general -L, please do a search on http://www.groupstudy.com/
before you ask a question. This will cut down on a lot of repeat questions.
This should also be in the FAQ for this Newsgroup/ -L.
Scott
====================================
>>There is no big mystery around the "management VLAN", it is just a regular
>>VLAN that the Sup or similar device needs to made a part of to communicate
>>with the outside world so that you can communicate and manage it.
>>
>>By default, the Sup modules are part of VLAN one, which you should use as
>>you management VLAN and put all other traffic on another VLAN if you really
>>want to make it easier for troubleshooting and a couple other reasons, but
>>you don't have to do this if you don't want to. It just makes your network
>>cleaner. If you only have one VLAN and a small network, just leave it that
>>way.
>>
>>I make my management VLAN an rfc1918 network, ( IE 192.168.x.x, etc )
>>so that I am using IP addresses that are blocked from being routed, for
>>security reasons and that I am not burning IP addresses that don't need to
>>go outside my network, IE: accessing the internet for HTTP, FTP, etc.
>>
>>You can put what VLAN the Sup module attaches to, part of any VLAN so you
>>could make a management VLAN, any VLAN number if you wish. However, the
>>default management VLAN by default from Cisco and other vendors is VLAN 1.
>>
>>I would recommend though that VLAN 1 remain the management VLAN for 1
>>reason, if you add a new switch to the network, it is by default in VLAN 1
>>unless it is programmed before it is put on the network. Why take a chance
>>of it being on the wrong VLAN? There have been cases where some switches
>>just won't work very well in anything else but VLAN 1 for management. Just
>>a
>>bug in the code. Some switches won't even let you move management from
>>working out of anything else than VLAN 1. Mostly the older switches though.
>>
>>If you have under 200 switches/devices on VLAN 1 that need to be managed
>>and
>>the router goes down or you start having router issues, all of your devices
>>are already on the same VLAN, which doesn't require routing at this point
>>since they are all on the same VLAN, then stick all everything else in
>>another VLAN. I have had NICs go bad and cause some nasty broadcast storms
>>but since they were on another VLAN, only that VLAN was really effected.
>>
>>You can have a port setup to be in VLAN 1 so you can attach a workstation
>>to
>>it to get to your devices in a pinch as you won't be routing at this point
>>as you will be on the same subnet.
>>( Assuming you are not doing secondary addressing or subinterfaces on the
>>router or running on the VLAN )
>>
>>I even set aside port 1 on all the switches I manage so that when I am in a
>>closet, I know I have a port to connect my laptop to, to manage the
>>switches, routers with. I even host 5 addresses on this net from my DHCP
>>server so that I don't even have to change my settings on my MAC Powerbook.
================================================
As people have said before there is no such thing as a "true" administrative
VLAN. VLAN 1 is just the default. When you do trunking you can tell it
which VLAN's to trunk. An ISL trunk is not part of any VLAN that is the
whole point. It just trunks groups of VLAN's. If someone can say it better
please do cause I know that did not come out very good.
John
----- Original Message -----
From: Bill Fenech <mailto:[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
Sent: Tuesday, September 12, 2000 11:39 PM
Subject: ISL Trunking on Cat 5500
Does your administrative VLAN have to be VLAN1 if you are using
ISL Trunking? I seem to remember reading this a couple months
ago, but now I can't find it.
Thanks in advance
Bill Fenech
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
----------------------------------------------------------
Scott Nelson - Network Engineer
Wash DC +1202-270-8968 & +1202-352-6646
Los Angeles +1310-367-6646
mailto:[EMAIL PROTECTED]
----------------------------------------------------------
"The better the customer service, the sooner you get to speak
with someone who can't help you."
----------------------------------------------
**NOTE: New CCNA/CCDA List has been formed. For more information go to
http://www.groupstudy.com/list/Associates.html
_________________________________
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
