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Posted by JD on August 23, 2005, 8:57 pm
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mark.boolootian@gmail.com wrote:
> Folks,
>
> I've got a question concerning media converters and autonegotiation.
> Consider the following diagram (a fixed width font will help):
>
>
> ----------- tp ------ fiber ------ tp ------------
> | switch1 |-------| MC1| ============== | MC2|--------| switch2 |
> ----------- ------ ------ ------------
>
> tp - twisted pair
> MC - media converter
>
> Assume the media converters are not of the bridge variety. If switch1
> were set to autonegotiate, but MC1 was not, would the link code word
> be sent across the fiber link and on to switch2? Presumably if that
> were true, it would be important that MC2 be configured similarly so
> that switch2's link code word would propagate to switch1.
>
> thanks for any clarity you can provide,
> mb
>
Mark,
My limited experince says Murphy will stick his head in there. We had
varying results (Allied Telesyn) where sometimes the auto negotiation
would work, sometimes not. And we're talking about the same pair of
machines, one restart they negotiated properly, the next it didn't.
Allied makes a converter for the 100 meg that is basically a 2 port
switch - that type of converter does fairly well. If it's a fiber
switch feeding a convert to a copper host/switch, the negotiation
generally works. The configuration you ask for is ususally begging for
the settings to be forced at the swtiches.
Jay Drew
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