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Cisco 2801 Router Interface Up; Line Protocol Down

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RichardBurrows6005
Level 1
Level 1

‎07-22-2019 11:23 AM

I have two 2801 routers, when I connect them with a CAT-5 cable to each other, then show  up / down.  When I connect them to a switch, it shows up/up.  Everything is set to auto on the interfaces.  I have read some of the posts about nothing being plugged into the ports, but I have a Router connected to Router with a DTE/DCE cable and FastEthernet cable into F0/0.  Has anyone seen this before?

 

Thank You for any help

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15 Replies 15

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RichardBurrows6005
Level 1
Level 1
In response to andrew.butterworth

‎07-23-2019 11:15 AM

We ran a longer known good cross-over cable to another router that we knew worked.  Still had the same issue.  We swap out the cable to straight-through and connect to a switch, the ports work, but when we go back to cross-over nothing.

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