Yes, if you are using a GBIC it needs to be Cisco to Cisco. However, I
have had success making 802.1q trunks work between Bay and Cisco devices
using "bundled" (Fast EtherChannel) ports.
Iohan
At 01:59 PM 9/27/2000 -0500, Steve and Monica Brokaw wrote:
>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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