I have heard similar things about the fiber connections must be Cisco to
Cisco, but I don't have anything technical to back it up.
HOWEVER, I do have first hand experience that there is a difference between
the way Bay and Cisco implement spanning tree. One of my customers plugged
in their brand new Cat5500 and brought down their entire backbone for over
40 hours. Due to non-disclosure I can't give you many specifics, I will
tell you that once the damage was done, the only way to fix it was to
shutdown the ENTIRE backbone. Since we had to do that, we just went ahead
and did a forklift upgrade of all the Bay stuff with Cisco stuff.
If it's possible you might want to do some experimenting in a non-production
environment before you start plugging stuff in. TAC says that what caused
our situation was a 1 in a million chance.
Steve Brokaw, MCSE CCNA CCNP
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Jorge Rodriguez
Sent: Wednesday, September 27, 2000 12:21 PM
To: NetEng; [EMAIL PROTECTED]
Subject: RE: Upgrading to Cisco switches
I am not an expert on mixed switching devices, but I would say in your
scenario I would make sure that if you're seting up
trunks then you will need to use 802.1q industry standar encap instead of
isl which is more of cisco proprietary.
Switches from different vendors must follow industry standard,
hoping that this is not a theory.
Jorge
------Original Message------
From: "NetEng" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Sent: September 25, 2000 6:25:31 PM GMT
Subject: Upgrading to Cisco switches
I am upgrading my network from Bay/Compaq/Misc. switches to Cisco switches.
I heard a rumor...in order to connect a Cisco switch (from a wiring closet)
via fiber (GBIC) the core switch must also be a Cisco. In other words, a
Cisco switch when connecting via fiber can only connect to another Cisco
switch. I find this hard to believe, but I want to make sure before I go
spouting off. Thanks in advance.
Jorge Rodriguez /CCNA
Network Analyst
R&S Networks Inc
1112 Boylston Street
Suite 222
Boston, MA 02115
1-781-614-1294
1-617-989-8634 Evenings
http://www.netwire.n3.net/
http://www.learncisco.n3.net/
........................................................
iWon.com http://www.iwon.com why wouldn't you?
........................................................
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