Design Reference

CANA
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 10/100 Mbps to 1000 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.
You can use CANA only on 10/100/1000 Mbps RJ-45 ports. 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).
If a 10/100/1000 Mbps port that supports CANA is in a MLT group that has 10/100BASE-TX
ports, or any other port type that does not support CANA, use CANA only if it does not conflict
with MLT abilities.
Hardware fundamentals and guidelines
32 Network Design Reference for Avaya VSP 4000 Series January 2015
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