06-21-2013 08:32 AM - edited 03-07-2019 02:01 PM
I am trying to bring back up a Cisco 3640 router. Fa1/0 is connected to gig card (6748) on a 6500.
Config on Gig port 1/47:
Current configuration : 156 bytes
!
interface GigabitEthernet1/47
description CR3640
switchport
switchport mode access
switchport nonegotiate
no keepalive
speed 100
duplex full
end
Config on fa1/0:
Current configuration : 158 bytes
!
interface FastEthernet1/0
description To Cisco 6509
ip address 129.111.99.18 255.255.255.192
no ip mroute-cache
no keepalive
speed 100
full-duplex
I was not sure if I need the non-negotiate on the gig port.
If I add speed and duplex to the gig port, port and line protocol show down/down. If I remove it, it is up and up and the port is up but line protocol shows up but I think it is because I removed keepalives.
Any ideas?
Thank you
06-21-2013 08:48 AM
Hi,
"switchport nonegotiate" refers to DTP (Dynamic Trunking Protocol) which is not relevant in this scenario. It sounds from what you have said that the issue might be to do with speed and duplex negotation. It might be a silly question but do you realise that you cannot set the gig side to "speed 1000" because your router port can only run at "speed 100" because it is fastethernet?
06-21-2013 09:10 AM
When I configure each port to full 100, I lose layer 2 on the router. Isn't their a non-negotiate I can configure on the 6500. The show interface will alway show the port a half/10 when in auto negotiate.
Yes mfurnival, I do realize I cannot configure "speed 1000" on the gig side. . I apprecaite the response.
06-21-2013 03:25 PM
Do you realize that your old 3640 won't be able to push 50 Mbps of data? So I guess this you put you configure your router's speed is irrelevant. :)
Don't remember the exact speed but I remember seeing to be very low. It doesn't matter what NM you attach in the router.
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06-21-2013 04:31 PM
Base on this document, the 3640 won't go higher than 25.6 Mbps.
So you can stick a NM-1GE module but you won't go anywhere near 100 Mbps.
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