From: Mike Williams (ccie2be@swbell.net)
Date: Fri Sep 19 2003 - 00:51:51 GMT-3
Well, in all reality, I'm thinking you're probably right. Polarity
would (in the electronics world) be the +/- or -/+ . I think we have a
2507 sitting in storage that I could pull out and verify, but at this
point, I tend to agree with you.
Mike W.
-----Original Message-----
From: Scott Morris [mailto:swm@emanon.com]
Sent: Thursday, September 18, 2003 10:22 PM
To: 'Mike Williams'; 'Barney Gaumer'; 'Roger McNeace';
ccielab@groupstudy.com
Subject: RE: Cisco 2507 with Hub ports to 3550 Switch
Good question, and from an engineering standpoint, I couldn't tell you!
I have used 2507's years ago, and as far as I recall we did specifically
have to use crossover cables regardless of what we did special in the
config.
Unfortunately, I don't have one around any longer, so I can't prove
anything one way or the other!
Anyone else got one around that has their curiosity piqued?
Scott
-----Original Message-----
From: Mike Williams [mailto:ccie2be@swbell.net]
Sent: Thursday, September 18, 2003 11:08 PM
To: 'Scott Morris'; 'Barney Gaumer'; 'Roger McNeace';
ccielab@groupstudy.com
Subject: RE: Cisco 2507 with Hub ports to 3550 Switch
I see what you're saying, but are you sure that it's not an
auto-crossover thing? I mean, the +/- electrical thing shouldn't ever
be an issue should it? That's been the same ever since ethernet's
existed, right? I guess I say that because I've seen hubs that do just
that (auto-detect whether a port should be crossed or not) and they call
it polarity as well. From a "theoretical" point of view, making a port
that autodetects crossover status wouldn't be that hard, as it would
simply look for a voltage (Fast Link Pulse, etc) on the 1/2 or 3/6 pair
and know that the pair with the voltage on it is the "link" signal (i.e.
the send pair) from the other end.
Mike W.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Scott Morris
Sent: Thursday, September 18, 2003 12:12 PM
To: 'Barney Gaumer'; 'Roger McNeace'; ccielab@groupstudy.com
Subject: RE: Cisco 2507 with Hub ports to 3550 Switch
Close. It actually has to do with a crossing of 1 and 2 or 3 and 6 in
between themselves. It's a +/- electrical thing, not an auto-crossover
ethernet thing! (That WOULD be a cool feature!)
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
CISSP, JNCIS, et al. IPExpert CCIE Program Manager IPExpert Sr.
Technical Instructor swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
-----Original Message-----
From: Barney Gaumer [mailto:bagaumer@yahoo.com]
Sent: Thursday, September 18, 2003 1:03 PM
To: Roger McNeace; 'swm@emanon.com'; ccielab@groupstudy.com
Subject: RE: Cisco 2507 with Hub ports to 3550 Switch
I think by auto-polarity he means that the hub's
uplink port knows to flip pins 1&2 with 3&6 depending
on if its a x-over cable or not.
My guess,
BG
--- Roger McNeace <rmcneace@terremark.com> wrote:
> Ok I will try another crossover when i get home. Not
> sure what u mean by
> auto polarity. Clean config only ip address and no
> shut on e0. E0 was
> up/up, didn't check for errors etc on interface. I
> will also try a debug ip
> packet to see if i at least get broadcasts. ARP
> resolution doesn't work
> either. Been so long since i used a MDI/MDI-x port
> i spelled it
> phonetically. :)
>
> -----Original Message-----
> From: Scott Morris [mailto:swm@emanon.com]
> Sent: Thursday, September 18, 2003 12:10 PM
> To: 'Roger McNeace'; ccielab@groupstudy.com
> Subject: RE: Cisco 2507 with Hub ports to 3550
> Switch
>
>
> Do you have a different crossover cable to try?
> That would be the first
> step. Is your 2507 set to auto-polarity or not on
> the hub ports? Do
> you have anything funky on your 2507 config? (I've
> seen people mess
> things up when getting fancy with the "hub" configs
> and trying to
> segment things)
>
> On the 2507, you show and up/up? Post output from
> the show interface
> command. Any errors? Resets?
>
> It doesn't necessarily need to be in the CAM table,
> since a switch will
> flood out all unknown frames to all ports (within
> the vlan). I assume
> all ports on the 3550 we're talking about are in the
> same vlan and set
> up for access mode?
>
> I haven't seen a 2506. Although I think you're
> talking about an
> MDI/MDI-X port. MIDI is for music. :)
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service
> Provider) #4713,
> CISSP, JNCIS, et al.
> IPExpert CCIE Program Manager
> IPExpert Sr. Technical Instructor swm@emanon.com/smorris@ipexpert.net
> http://www.ipexpert.net
>
>
> -----Original Message-----
> From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On Behalf Of
> Roger McNeace
> Sent: Thursday, September 18, 2003 11:43 AM
> To: ccielab@groupstudy.com
> Subject: RE: Cisco 2507 with Hub ports to 3550
> Switch
>
>
> I do see a link light on the swith. The port is up
> (sh ip int brief) in
> the router but no link light on hub port. I am
> trying to ping between a
> 2501-----[cat3550]------2507. I dont see the e0
> mac address from the
> 2507
> in the switch cam table, I assume I need this to
> ping the e0 ip address
> interface. Pretty sure the crossover cable is good,
> I have used this
> cable in my rack before between other routers. I saw
> that the 2506 has a
> 14 por thub with a MIDI port, but the crossover
> should to the same
> thing.
>
> -----Original Message-----
> From: Scott Morris [mailto:swm@emanon.com]
> Sent: Thursday, September 18, 2003 10:25 AM
> To: 'Roger McNeace'; ccielab@groupstudy.com
> Subject: RE: Cisco 2507 with Hub ports to 3550
> Switch
>
>
> Is your cable good?
>
> While I haven't had a 2507 in quite a while, I do
> have other hubs
> plugged into a 3550 and they work just fine. Got
> one on a crossover
> cable, and another with a straight-through (uplink
> port on hub). You're
> correct on the 10-half setting though.
>
> What do you see on the switch? Link light?
> Anything? Errors?
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service
> Provider) #4713,
> CISSP, JNCIS, et al. IPExpert CCIE Program Manager
> IPExpert Sr.
> Technical Instructor
> swm@emanon.com/smorris@ipexpert.net
> http://www.ipexpert.net
>
>
> -----Original Message-----
> From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On Behalf Of
> Roger McNeace
> Sent: Thursday, September 18, 2003 9:15 AM
> To: 'ccielab@groupstudy.com'
> Subject: Cisco 2507 with Hub ports to 3550 Switch
>
>
> Does anyone know if it is possible to connect the
> hub ports on a 2507 to
> a 3550 switch. I tried a crossover cable, setting
> the speed and duplex
> speed to 10half on switch, setting swithport to
> routed port, but
> nothing works. Hub ports only seem to work if
> directly plugged into
> another router or PC.
>
> ***Get your CCIE and a FREE vacation:
> Shop.GroupStudy.com***
>
This archive was generated by hypermail 2.1.4 : Wed Oct 01 2003 - 07:24:31 GMT-3