I have an issue with a Cisco 4900M switch with a WS-X4908-10G-RJ45 half card. The link connection between a 10Gbase-T server nic and the switch does not establish, i believe it is an auto negotiation problem. The link fluctuates constantly between connected and disconnected when set to auto negotiate. When the 10G half card port groups are configured for 1G connections it does the same. If i hard code the server nic to 1G the link remains up when the port group is at 1G. If i hard code the server nic to 10G the link stay down, i don't think the port speed and duplex can be hard coded on the switch end. I have tried updating the drivers on the server as well as diagnostic tests on the nic, which passed. The 4900M IOS code is version 15.0.2-SG2. If i plug a laptop into the 1G configured port the switch and the laptop negotiate at 1G. Also, i believe, if the 10G server nic is plugged into another 1G only switch the link auto negotiates to 1G as normal. The server nic is an INTEL Server Adapter AT 10G, which became end of life in 2009. I believe the half card came out in 2010.
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...