Bill,
A link that is trunking does not belong to any VLAN. However, if trunking
goes down, then the ports at either end of the link revert to their
"native" VLAN. If no VLAN has been assigned to those ports, then they
default to VLAN 1. VLAN 1 is the VLAN that carries CDP, STP, VTP, and other
control protocols. This is why VLAN 1 is always routed between switches
regardless of what VLAN the link ports belong to. Telnet and SNMP use the
VLAN that the management interface belongs to (whichever interface defines
the switch's IP address - sc0 on the Cat 4000, 5000, and 6000 series). Your
administrative/Management VLAN can be anything you want it to be. Your
trunking ports can have any native VLAN they want as long as the ports on
both ends of the link are part of the same VLAN (otherwise they won't be
able to communicate in order to set up the trunking).
I've simplified some stuff and left out other stuff but thats the gist of
it. Any clearer for you?
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
"John Kaberna"
<john.kaberna@net To: "Bill Fenech" <[EMAIL PROTECTED]>,
<[EMAIL PROTECTED]>
cginc.com> cc:
Sent by: Subject: Re: ISL Trunking on Cat 5500
nobody@groupstudy
.com
09/12/2000 11:56
PM
Please respond to
"John Kaberna"
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
To: [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]
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