Not true from my experience.
I have Bay Accelars as my core and Cisco, Cabletron and 3Com switches of
different types, including a Cisco 6509 and they work OK.
Just make sure you set your Spanning tree root switch up with a different
priority than the other switches as well as you back up root and if you are
doing trunking, you can only use 801.1q between vendors. Only industry
standard routing protocols will work between vendors, IE: RIP, OSPF, Etc.
Scott
> 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?
> ........................................................
>
> **NOTE: New CCNA/CCDA List has been formed. For more information go to
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> **NOTE: New CCNA/CCDA List has been formed. For more information go to
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----------------------------------------------------------
Scott Nelson - Network Engineer
Wash DC +1202-270-8968 & +1202-352-6646
Los Angeles +1310-367-6646
mailto:[EMAIL PROTECTED]
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"The better the customer service, the sooner you get to speak
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