Cana - Avaya 8800 Planning And Engineering

Table 11: Recommended autonegotiation setting on 10/100BASE-TX ports
Port on A
Autonegotiation
enabled
Full-duplex
Autonegotiation cannot detect the identities of neighbors or shut down misconnected ports.
These functions are performed by upper-layer protocols.

CANA

The R and RS modules support Custom Auto-Negotiation Advertisement (CANA). Use CANA
to control the speed and duplex settings that the R and RS modules advertise during
autonegotiation sessions between Ethernet devices. Links can only be established 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 Mbit/s to 1000 Mbit/s on host and server
connections. Using autonegotiation only, the switch always uses the fastest possible data
rates. In scenarios where uplink bandwidth is limited, CANA provides control over negotiated
access speeds, and thus improves control over traffic load patterns.
CANA is supported on 10/100/1000 Mbit/s RJ-45 ports only. To use CANA, you must enable
autonegotiation.
Important:
If a port belongs to a MultiLink Trunking (MLT) group and CANA is configured on the port
(that is, an advertisement other than the default is configured), then you must apply the same
configuration to all other ports of the MLT group (if they support CANA).
If a 10/100/1000 Mbit/s port that supports CANA is in a MLT group that has 10/100BASE-
TX ports, or any other port type that do not support CANA, then use CANA only if it does
not conflict with MLT abilities.
Planning and Engineering — Network Design
Port on B
Autonegotiation Ports negotiate on
enabled highest supported
mode on both sides.
Full-duplex Both sides require the
same mode.
Remarks Recommendations
Recommended setting
if both ports support
autonegotiation mode.
Recommended setting
if full-duplex is required,
but autonegotiation is
not supported.
CANA
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