Nortel Networks manual Release Notes for the BayStack 450 10/100/1000 Series Switch

Release Notes for the BayStack 450 10/100/1000 Series Switch

•IEEE 802.1D spanning tree parameters

Spanning tree parameters cannot be configured from the console interface (CI) menus and screens.

Configuration support is available through the Bridge MIB using Simple Network Management Protocol (SNMP). Refer to RFC 1493 for more information.

•The spanning tree configuration must be the same on both ends of a MultiLink trunk.

•Spanning tree port participation

The Fast Learning value (used with the Participation field in the Spanning Tree Port Configuration screen) is the same as the Normal Learning value, except that the state transition timer is shortened to two seconds.

Nortel Networks recommends using the Fast Learning value to optimize switch-to-endstation connections. When you connect one switch to another switch, the Normal Learning (default) value provides the best results.

•MAC address-based security learning process

If you move a device from one port to another during the MAC address-based security learning process, the device’s MAC address will move to the new port and will no longer be allowed on the original port. A given MAC address can be learned on only one port at a time.

•The BayStack 450-2M3 and the BayStack 450-2S3 MDAs do not support MAC-based security, Autotopology protocol, and EAPOL.

•You cannot assign an untagged port to multiple protocol VLANs that have the same protocol ID.

•Redundant gigabit Phy

You cannot use the redundant gigabit Phy port (the backup Phy port) to create two different paths.

•Autonegotiation restriction with gigabit ports

The BayStack 450 switch’s gigabit MDA ports comply with IEEE 802.3z Draft 3.2 and IEEE 802.3z Draft 4.1; however, the following restriction applies to the autonegotiation feature:

--Autonegotiation does not restart if an invalid code word is received from the link partner during the autonegotiation process. In cases where autonegotiation fails, disable and then enable autonegotiation.

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