Autonegotiation issues may result from nonconforming implementation, hardware incapabilities, or software defects. When NICs or vendor switches do not conform exactly to the IEEE specification 802.3u, problems may result. Hardware incompatibility and other issues may also exist as a result of vendor-specific advanced features, such as autopolarity or cabling integrity, which are not described in IEEE 802.3u for 10/100 Mbps autonegotiation. Generally, if both the NIC and the switch adhere to IEEE 802.3u autonegotiation specifications and all additional features are disabled, autonegotiation should properly negotiate speed and duplex, and no operational issues should exist.
I had a similar issue where the switch ports were set on autonegotiate and the switchports of the Ip phone also.Unfortunately,some PC's were configured at 100/full (settings could not be changed for some reason) and although my PC port on the ip phone was also set on 100/full,the real status of the port was 100/half.
For some NIC's this was not an issue but for those who did had a problem we had to force the PC port of the phone to autonegiate.
I asked Cisco and they came up with a very nice document were states that the PC port and the switchport,both of the phone,must be equal configured.
My initial configuration (switchport autoneg and PC port 100/full) is not supported by Cisco.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...
If you have 2 ISR routers, one acting as Failover, do we need to have both the same number of SRST licenses on the 2 routers?
No. You will only need the SRST licenses on the primary router. Because this feature...
You have reached the Cisco Logistics Support Center.. To Check Status of your RMA, visit Product Returns & Replacements (RMA).
Need help? Contact us by Phone or Email.
Phone: 1800 553 2447 Option 4