Cisco 837 - Ethernet 2 interface issue

growse

growse

growse

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Hi all, just read about the fact that the cisco 837 has more than one useable ethernet interface. I know it lists 3 (0-2), but assumed that 0 was connected to the switch and the other two were unusable. Turns out that if you enable 2, the 4th port on the switch (fastethernet 4) becomes the physical interface for ethernet 2. Useful for setting up a DMZ.

So I go and configure the interface, just give it an ip of 10.1.0.1/24, and bring it up. Seems to come up ok. Then I plug something into the 4th port, and the internet stops working on ethernet0. It's rather strange, as soon as I plug something in, dns stops happening for ethernet0. Unplug it from ethernet2, and it starts working again.

Any ideas what the hell's going on?
 
You mean ethernet 2? Looking at the documentation for my IOS, ethernet 2 is there to provide another interface for use as a DMZ, so it should all be supported...
 
Code: 
nosey>sh ver
Cisco IOS Software, C837 Software (C837-K9O3Y6-M), Version 12.3(8)YG2, RELEASE SOFTWARE (fc1)
Synched to technology version 12.3(10.3)T2
Technical Support: [url]http://www.cisco.com/techsupport[/url]
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Fri 06-May-05 05:19 by ealyon

ROM: System Bootstrap, Version 12.2(8r)YN, RELEASE SOFTWARE (fc1)
ROM: Cisco IOS Software, C837 Software (C837-K9O3Y6-M), Version 12.3(8)YG2, RELEASE SOFTWARE (fc1)

nosey uptime is 3 weeks, 2 hours, 10 minutes
System returned to ROM by reload at 08:34:54 BST Thu Feb 2 2006
System restarted at 08:37:31 GMT Thu Feb 2 2006
System image file is "flash:c837-k9o3y6-mz.123-8.YG2.bin"

I'm on 12.3(8) here, so it should support it. It's certainly in the 12.3(8)YG2 documentation...
 
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