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PIX 506e and CIsco 2811

We am upgrading from DSL to a T1.  The vendor has supplied a managed Cisco 2811.  When I plug a computer directly into the router and configure the IP addresses correctly I can get out to the internet.  However when I plug a PIX 506e (same one we are using for the DSL)  into the router after changing the ip address and gateway (static route), the link is listed as down in ASDM.  Also, the link light for the port on the PIX does not light up when plugged into the router.  I change the PIX configuration back and plug it back into the DSL modem and the link comes up.

I've not seen anything like this before.  Is there something I'm missing?  I've tried both a straight and cross-over cable with the same results.
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d-mass
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d-mass
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1 Solution
 
SouljaCommented:
Are the duplex / speed settings matched between the two?
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akalbfellCommented:
DO you happen to have a spare switch that you can connect the router and firewall to?
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SouljaCommented:
That's another great option.
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d-massAuthor Commented:
The port on the PIX is set to Auto / Auto (and I've rebooted it after saving the configuration).  Because the router is managed by the supplier I can't check it.

I can try manually set the port on the PIX to the different possible combinations.
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akalbfellCommented:
there is probably a 99% chance the router is set to full/100
Do you have a switch to try? I like using that type of setup anyway because then you can plug a PC directly into that switch, assign an external IP and bypass the firewall. Comes in handy every now and again for things.

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d-massAuthor Commented:
I tried all of the combinations other than Auto and failed each time.  I don't have a switch available at the moment.  I 'll need to pick that up from my office as I'm at at a satellite plant.

I'm somewhat confused how that will help.  I've been able to demonstrate that it work's if a computer is plugged directly into the router.
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akalbfellCommented:
The router isn't the issue. You said you can't bring the port on the PIX up. You can rule out the router port being disabled since everything works when you plug a PC into that port. If you connect to the switch and the port doesn't come up there is a problem with the interface.

Might as well mention that you should double check the PIX to make sure that interface isn't admin down.
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d-massAuthor Commented:
The PIX interface does work when the PIX is plugged into the DSL modem.  The link comes up and the internet connection works.  When the PIX is plugged into the 2811 the link does not come up (or light up).
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akalbfellCommented:
My apologies. That is obviously very strange. If you get around to trying a switch it will probably work. Unfortunately I can't give you a good explanation why it's not working as is.
I really doubt it's a config issue or a speed/duplex mismatch especially considering all the ways you tried it. Can't really be a hardware issue either since you pretty much ruled that out.
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pgolding00Commented:
does the dsl modem include a few ports for the local network, like a switch? could be that the cable you use between dsl and pix outside is a normal straight-through. if you used that same cable from pix to 2800, it would not work as both are DTE interfaces and neither likely support mdi/mdix auto-sensing. you need a crossover cable from pix to 2800, unless one of them supports mdi/mdix auto sensing.
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d-massAuthor Commented:
This falls into the category of don't assume anything.  Using a switch I realized that the port on the router was not staying up.  It appears that in the 2 hours between testing connection with my laptop and attempting to plug the PIX in, the carrier disabled that port on the router.  After calling their support and getting the port reenabled, everything works as expected.

Thanks for the suggestions.
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d-massAuthor Commented:
Not the solution but provided guidance to determine the problem.
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akalbfellCommented:
odd especially considering this... "I've been able to demonstrate that it work's if a computer is plugged directly into the router"

Glad you were able to get it working. Leave it to the phone company to do something like that.
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