Yes, I have both 1000Mb and 100Mb fiber links and 100 Mb UTP links as well,
to other vendors switches.
I just wish that the other vendors switches supported UDLD and BPDU's per
VLAN like Cisco does.
Scott
> Well, the spanning tree thing was a rare thing, but TAC does have other
> instances of it happening. But none of it is with the newer switches,
> almost all when replacing legacy equipment.
>
> Do you have fiber links between Cisco/Bay? This isn't my problem but I am
> curious.
>
>
> Thanks,
>
> Steve Brokaw
>
> -----Original Message-----
> From: Scott Nelson [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, September 27, 2000 4:06 PM
> To: Steve and Monica Brokaw
> Subject: Re: Upgrading to Cisco switches
>
>
> 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
>> http://www.groupstudy.com/list/Associates.html
>> _________________________________
>> UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
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>>
>> **NOTE: New CCNA/CCDA List has been formed. For more information go to
>> http://www.groupstudy.com/list/Associates.html
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>> Report misconduct and Nondisclosure violations to [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."
> ----------------------------------------------
>
----------------------------------------------------------
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
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