Auto-Negotiation advertisements use Custom Auto-Negotiation Advertisement (CANA) to control the speed and duplex settings that the interface modules advertise during Auto-Negotiation sessions between Ethernet devices. Modules can only establish links using these advertised settings, rather than at the highest common supported operating mode and data rate.
Use CANA to provide smooth migration from 10 Mbps to 10000 Mbps on host and server connections. Using Auto-Negotiation only, the switch always uses the fastest possible data rates. In limited-uplink-bandwidth scenarios, CANA provides control over negotiated access speeds, and improves control over traffic load patterns.
Use the auto-negotiation-advertisements command to configure CANA.
To use CANA, you must enable Auto-Negotiation.
Important
If a port belongs to a MultiLink Trunking (MLT) group and you configure CANA on the port (that is, you configure an advertisement other than the default), you must apply the same configuration to all other ports of the MLT group if they support CANA.
The following platforms (switches and removable modules) support full duplex and half duplex modes for CANA:
|
Platform |
Full duplex |
Half duplex |
|---|---|---|
| 5420 Series | Supported on
|
Supported on
|
|
5520 Series |
Yes |
Supported on 5520-24T, 5520-24W, 5520-48T, 5520-48W and ports 1/1/ - 1/36 on 5520-12MW-36Wonly. |
|
VSP 4450 Series |
Yes |
Yes |
|
VSP 4900 Series |
Yes |
Supported at 100Mbps onVSP4900-48P and first 12 ports of VSP4900-12MXU-12XEonly. |
|
VSP 7200 Series |
Yes |
No |
|
VSP 7400 Series |
yes |
No |
|
VSP 8200 Series |
Yes |
No |
|
VSP 8400 Series (includes 8424XT, 8418XTQ, and 8424GT ESMs) |
Yes |
No |
|
VSP 8600 Series |
Yes |
No |
|
XA1400 Series |
Yes |
Yes Supported on ports 1/1-1/4 only. |