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switchport trunk encapsulation negotiate
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| Yeti-GBR1 2002-04-18, 11:59 am |
| Has anyone had any experience with using the
switchport trunk encapsulation negotiate command when using cisco to other brands switches, and does it work 100% of the time?
I have been researching some stuff on "Trunks" and came across the command on Cisco's web ( http://www.cisco.com/univercd/cc/td...ayer2.htm#26096 )
quote:
switchport trunk encapsulation negotiate
Specifies that the interface negotiate with the neighboring interface to become an ISL (preferred) or 802.1Q trunk, depending on the configuration and capabilities of the neighboring interface.
Just curious that's all  | |
| Yeti-GBR1 2002-04-18, 12:06 pm |
| I suppose it would also need these setting on each switch as well:
SW1 switchport mode dynamic desirable
and SW2 switchport nonegotiate
Othewise it would not Trunk at all
Ref:
http://www.cisco.com/univercd/cc/td...ayer2.htm#18674
Any thoughts?  | |
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| quote:
Originally posted by Yeti-GBR1
when using cisco to other brands switches, and does it work 100% of the time?
ISL is Cisco Proprietry - so would never work with other manufacturers - leaving only dot1q - so why negotiate, nothing left except for none???? You getting me back for last weekend!
I believe neogitate uses DTP for it's negotiation, which is also Cisco proprietry - I guess the answer is no it will never work, I'll bring a 3COm & Nortel switch round this weekend for you to play with to prove it!!!!! And I thought I might get a weekend off!
The following link descripes negotiation quite well (but you've probably read it already):
http://www.cisco.com/univercd/cc/td...m#xtocid2490928 | |
| Yankee 2002-04-18, 4:07 pm |
| That's a nice question to play with while learning stuff but in the real world you want to define everything in your network design and not let any piece of equipment elect or negotiate anything. You be the boss and tell which device you want to what and with whom! 
Yankee | |
| Yeti-GBR1 2002-04-18, 4:50 pm |
| Ok forgive the TWIT (i.e. ME) for asking but...could you expand on why you would nail it down rather than negotiate please....seems logical to me but then as Mat P knows I'm far from logical  | |
| MadChef 2002-04-18, 7:06 pm |
| quote:
Originally posted by Yeti-GBR1
could you expand on why you would nail it down rather than negotiate please
Because if you give anything the opportunity to go wrong, it will. Let it negotiate and sometime, someplace (this usually involves a meeting full of people who make a lot more than you do) and your trunk will miraculously find a way to negotiate incorrectly. Afterwards, while waiting for your unemployment check, you will spend hours in a lab trying to reproduce the error, but will be unsuccessful. Then Yankee will say "I told you so."
I'm with Yankee. If you can lock it down (be it trunk negotiation, port speed, duplex, deciding who buys the beer) then do it.
MadChef | |
| Yeti-GBR1 2002-04-18, 7:25 pm |
| Ok I'm convinced...looks like I'm the one for the beers...with "I told you so" nagging in my ears... Sonuds more like Murphy's law if you ask me though | |
| Yankee 2002-04-19, 4:02 am |
| HEY! I ask permission to say "I told ya so!"
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