From: kym blair (kymblair@xxxxxxxxxxx)
Date: Mon Oct 01 2001 - 19:55:42 GMT-3
I've had this problem several times with 4000 and 2500 series routers; in
almost every case, the problem was heat. Point a fan toward your rack and
you should be fine. In a couple cases, I had to replace the NP-4T, or quit
using the bad interface.
You didn't ask about 2500s, but their fan is located on the bottom of the
router. The 2500 should be rack mounted, or at least have it's pads in
place to raise it off the table.
One other possibility: Cisco specs say that the main memory sticks on a 400
must be the same size (4+4, 16+16). You are running 16+4. I've never run
mismatched memory sticks, so don't know if it matters. I doubt that this is
the problem, but if you have a couple 4000's, you might swap memory around
for a while to see if it makes a difference.
Kym
>From: "David Siwula" <DSiwula@ceira.com>
>Reply-To: "David Siwula" <DSiwula@ceira.com>
>To: "Charles Huang" <charlesny2000@yahoo.com>, <ccielab@groupstudy.com>
>Subject: RE: Problem with NP-2T on Cisco 4000 router
>Date: Mon, 1 Oct 2001 09:35:26 -0700
>
>Possibly crappy cables? Sometimes cables act up. I had this problem
>until we actually bought the cisco cables....
>Dave
>
>-----Original Message-----
>From: Charles Huang [mailto:charlesny2000@yahoo.com]
>Sent: Monday, October 01, 2001 9:30 AM
>To: ccielab@groupstudy.com
>Subject: OT: Problem with NP-2T on Cisco 4000 router
>
>
>Hi,
>
>I have a Cisco 4000 router with 4M flash/16+4 RAM with
>two * NP-4T cards. Serial 2 & Serial 6 ( 3rd port on
>each of the card ) on this router works fine for about
>20-30 minutes. after that the link/line protocol
>bounce up and down, then it goes down completely. I
>tried both Frame-Relay and HDLC encapsulation as well
>as lowing the clock rate to 56000 and 64000.
>
>Has anyone cames across same or simular kind of
>problem ?
>The router is running 12.0(15) IP/IPX/AT/DEC Plus
>feature set.
>
>Any help/suggestions will be appricated
>
>Thanks in advance
>
>Charles
>
>
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